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Entomologiske Meddelelser il ENTOMOLOGISKE MEDDELELSER UDGIVNE AF ENTOMOLOGISK FORENING. TRETTENDE BIND. (ANDEN RÆKKE. OTTENDE BIND.) MED 1 PORTRÆT OG 80 FIGURER I TEKSTEN. Wr KJØBENHAVN. ENTOMOLOGISK FORENINGS FORLAG. HOVEDKOMMISSIONÆR: H. HAGERUPS BOGHANDEL. N. T. KRGYERS BOGTRYKKERI, LYNGBY. 1921-22. Redaktionen af dette Bind er besorget af Mag. sc. Kai L. Henriksen. INDHOLD. Første Hefte (1919). J. P. Kryger: Dr. phil. J. C. Nielsen pag. 1 Peder Nielsen: Description of a new species of Nematocera polyneura from Denmark with notes concerning some . other species . , - 12 Eigin Suenson: Om Klækningen af Metoecus paradoxus L. 17 Niels Høeg: Nogle Meddelelser om Fund af sjældnere og enkelte for den danske Faunu nye Bille-Arter i Jylland, specielt Horsensegnen - 23 J. P. Kryger: Biologiske Oplysninger om nogle nye eller sjældne Billelarver. II — 30 Lavrids Jørgensen: De danske Arter af Slægten Nomada Scop - 40 Andet Hefte (1919). Lavrids Jørgensen: De danske Arter af Slægten Nomada Scop. (forts.) — 49 A. Norgaard: Verdenskrig og Insektbekæmpelse 73 Dansk entomologisk Litteratur — 85 Tredie Hefte (1920). H- O. Holstebroe: Christian Engelhart. 14. Juli 1857-21. Juni 1919 - 97 L. Andersen: Billefaunaen i Sønderjylland 108 H. Seht tz: Drei neue europäische Phoriden (Dipt.) . 115 R. Spärck: Om Larven til Philosepcdon humeralis Meig. (Dipt. Psychodidæ) - 120 Oluf Jacobsen: Fund af nye og sjældne Tæger i 1915-19, samt Bemærkninger om nogle Arter, der hidtil stod upaaagtede eller ubestemte i afdøde Konservator Schlicks Samling — 128 Mindre Meddelelser - 136 Dansk entomologisk Litteratur — 147 Fjerde Hefte (1920). Lavrids Jørgensen: Smaa Iagttagelser af nogle danske Biers Liv - 153 Peder Nielsen: Description of Trichocera forcipula n. sp., with notes on Limnophila meridiana Stæg 160 A. C. Ullmann: Hannerne av Strophosomns melanogram- mus Frst 163 E. Nielsen: Træk af Insekternes Liv - 168 Elisabeth Deiehmann: Note sur un cas de Hermaphro- ditisme lateral chez une Araignée — 181 J. P. Kryger: Further investigations upon the European Trichogramminae -- 183 Jens Brændegaard: The male of Thanatus stria tus C. L. -' Koch (Aran. Philodrom.) found for the first time . 189 Mindre Meddelelser - 192 Dansk entomologisk Litteratur - 195 Femte Hefte (1920). A. C. Jensen-Haarup: Hemipterological Notes and Des- criptions I - 209 J. P. Kryger: Carl C. R. Larsen. 2. August 1846-9. Maj 1920 - 225 Elisabeth Deiehmann: Oversigt over de danske Theridier samt over Slægten Dictyna (Aran.) (fortsættes) .... - 231 Sjette Hefte (1921). Elisabeth Deiehmann: Oversigt over de danske Theridier samt over Slægten Dictyna (Aran.) (sluttet) - 257 J. P. Kryger: Den store Myredød ved Louisehøj i Tisvilde Hegn i Foraaret 1920 - 289 H. O. Holstebroe: L. Andersen 6te Maj 1843 -4de Ok- tober 1920 - 293 Mindre Meddelelser - 296 Nyt entomologisk Værk — 298 Dansk entomologisk Litteratur 300 Syvende Hefte (1921). Kai L. Henriksen: Oversigt over de danske Coccidae . 305 H. Schmitz: Aptinandria, eine neue, in beiden Geschlech- tern flügel- und schwingerlose Phoridengattung aus Afrika (Phoridae, Diptera) 318 E. Tetens Nielsen: Paralyseringen hos Ammophila .... 323 T. Munster: Strophosomus melanogrammus Frst., rufipes Steph. og capitatus Degeer 330 Mindre Meddelelser - 336 Oversigt over Entomologisk Forenings Møder i Sæsonen 1917 18, 1918-19 og 1919-20 344 Medlemsfortegnelse 1. August 1921 — 352 ENTOMOLOGISKE MEDDELELSER UDGIVNE AF ENTOMOLOGISK FORENING. TRETTENDE BIND. FØRSTE HEFTE. / Indhold. pag. J. P. Kryger: Dr. phil. J. C. Nielsen 1 Peder Nielsen, Silkeborg: Description of a new species of Nematocera polyneura from Denmark with notes concerning some other species 12 Eigin Suenson: Om Klækningen af Metoecus paradoxus L. 17 Niels Høeg: Nogle Meddelelser om Fund af sjældnere og en- kelte for den danske Fauna nye Bille-Arter i Jylland, specielt Horsensegnen 23 J.P.Kryger: Biologiske Oplysninger om nogle nye eller sjældne Billelarver. II 30 Lavrids Jørgensen: De danske Arter af Slægten Nomada Scop. 40 Wr KJØBENHAVN. ENTOMOLOGISK FORENINGS FORLAG. HOVEDKOMMISSIONÆR: H. HAGERUPS BOGHANDEL. 1919. Dr. phil. J. C. Nielsen. Født 25. Marts 1881. - Død 15. Maj 1918. Af J. P. Kryger. Redaktøren ai vort Tidsskrift, Dr. phil. I. C. Nielsen er død, og jeg vil i den Anledning gerne have Lov til at mindes ham og hans Arbejde med dansk Entomologi. Mit første bestemte Indtryk af I. C. Nielsen stammer fra Dagen efter hans Doktordis- putats. Jeg var ved Middagstid paaVej til Hareskoven og var naaet til Bakken ved ,; Stralsund", da jeg mødte ham. Han kom fra Skoven, hvor han havde taget sig en Morgentur oven paa Gaarsdagens Anstren- gelser. Han svingede med Hatten, var glad og fornøjet og saa ikke ud til at lide af nogen Slags Træthed. Og saa- ledes som jeg husker Dr. phil. I. C. Nielsen. ham fra den Dag, saaledes er han blevet ved med at staa for mig: glad, fornøjet, aldrig trættet, stedse ivrigt arbejdende. I Aaret 1900 offentliggjorde en ung lQ-aarig Mand en Afhandling: Biologiske Studier over Grave- hvepse i Vid. Medd, fra Nat. For., Kbhvn. Afhandlingen fylder bare 25 Sider, men den indeholder foruden Be- skrivelsen af en for Videnskaben ny Gravehveps, en saa- dan Fylde af nye Iagttagelser hentede fra Naturen, at man ikke rigtig forstaar, at Iagttageren kun var 19 Aar gammel, og da han vel nok har brugt et Par Somre til sine Ind- samlinger, altsaa kun har været 17—18 Aar, da Arbejdet blev gjort. Den unge Mand var stud. jur. I. C. Nielsen, og at han ikke siden har behøvet at skamme sig over dette Ungdomsarbejde, kan man se deraf, at det har nydt den Ære at blive citeret omtrent Ord til andet i F. F. Kohls Standardværk Die Crabronen der palæ- arktischen Region (Ann. des k. k. natur. Hofmus. Wien. Band XXIX. 1915), hvilket Arbejde ogsaa gengiver I. C. Nielsens Tegninger af Rederne. At den unge Mand var stud. juris forekommer een mærkeligt; at han vedblev at være det og endog tog ju- ridisk Embedseksamen synes endnu mærkeligere. For dette Arbejde burde jo dog have overbevist alle dem, der kunde se, om, at den unge Mand var Zoologen af de høje Guders Naade, frem for nogen var den forstaa- ende Iagttager af det levende Liv ude i Naturen. Og havde Lederen af Zool. Mus. 3. Afdl., Dr. phil. Meinert, ikke alt paa dette Tidspunkt været en ældre Mand, hvis Interesser ikke mere drejede sig om Undersøgelse i det frie, saa havde han sat Himmel og Jord i Bevægelse for at sikre sit Museum denne »Kraft", der fuldt rustet plud- selig sprang frem paa Skuepladsen. Men Dr. Meinert fik altsaa ikke stud. juris I. C. Nielsen ansat paa Musæet og heller ikke gjorde han vist det mindste for at faa den unge Forsker til at studere Zoologi i Stedet for Jura. Det var nu utvivlsomt et Fejlgreb, at 1. C. Nielsen blev Jurist. Vel er Naturhistoriens Vej her i Danmark saare trang at vandre ad, og man skal sikkert ikke uden tvingende Grunde vælge Zoologien til Brødstudium, hvis man vil frem her i Landet. Det er forstaaeligt, at I. C. Nielsens Familie havde store Betænkeligheder ved at lade Sønnen følge sine Interesser. — Saavidt jeg har forstaaet afdøde Konservator Schlick havde Faderen, Sygehuslæge R. Nielsen, Hillerød henvendt sig til forskellige blandt andre ogsaa til ham, for at forhøre sig om Udsigterne for Zoologer. Schlick havde, som rimeligt var, givet Faderen ret nedslaaende Besked. Dette passede sikkert godt til den Mening, som Familien alt i Forvejen havde dannet sig, at Zoologien ikke var noget, man kunde leve af, mens Jura var noget, der nok kunde føde sin Mand. Men da det økonomiske ingen Rolle spillede for 1. C. Nielsen og hans Familie, er det alligevel ubegribeligt, at Planerne om Brødstudiet sejrede, og at I. C. Nielsen tog sin juridiske Embedseksamen. Faget morede ham ikke, og jeg er nærmest tilbøjelig til at tro, at det udelukkende var af Pietetshensyn overfor Faderen, at han fuldendte Studierne. Men samtidig med, at han studerede Jura, drev han ufortrødent sine Studier i Naturen. Først og fremmest vedblev han at sysle med Gravehvepsene, men han fik ogsaa Lejlighed til at hellige Bierne sin Opmærksomhed, og der fremkom fra hans Haand i Vid. Medd. fra Dansk Nat. For. 1902 et Arbejde: Biologiske Studier over danske enlige Bier og deres Snyltere, atter et Ar- bejde, der rummer en Masse nye Iagttagelser. Ogsaa paa andre Omraader (Bladhvepsegaller, Marvpletter ö. m. a.) har hans Arbejde i disse Aar baaret Frugt i Form af mange Nyiagttagelser, publicerede i danske og tyske Tidsskrifter. I Sommeren 1903 opdagede I. C. Nielsen under et Besøg i Tisvilde det senere saa berømte Pilehegn langs Vejen til Helene Grav. Han fik her Oje for hvilken Rolle Snylterne spiller i Kampen mellem Planter og Insekter og kommer derved ind paa Undersøgelser over Snylte- fluerne. Den Bane, han saaledes var ledet ind paa, skulde han ikke mere forlade. Tachinerne optog ham i stedse højere Grad, og i hans sidste Leveaar var al hans Fritid optaget af Studierne over Snyltefluernes Biologi og deres Systematik. Det første Resultat af Tachinunder- søgelserne er hans Doktordisputats, der udkom i 1909 og bærer Titlen: Iagttagelser over entoparasitiske Muscidelarver hos Arthropoder. Heri giver han først en Oversigt over det lidet, der indtil da var kendt om de biologiske Forhold hos Snyltefluernes Larver, og dernæst giver han Beskrivelse af og biologiske Oplysninger om adskilligt af ham selv tilvejebragt Materiale. Afhand- lingen er skrevet saaledes, at store Partier af den med Fornøjelse kan læses af Ikke-Specialister. I. C. Nielsen blev med Hæder Dr. phil., og Ent. Med., som trykte Dis- putatsen i 2. R. 4. Bind, maa regne denne Afhandling blandt dem, der vil give Tidsskriftet blivende Værd. Fra Tiden kort efter Disputatsen stammer mit nær- mere Bekendtskab med Dr. Nielsen. Det, der førte os sammen, var Snyltefluen Digonochæta setlpennis. Vi traf en Dag i Sommeren 1909 hinanden paa Zoologisk Mu- seum og kom i Snak om Snyltefluer. I Samtalens Løb bemærkede Dr. Nielsen, at Meinert i 1863 meddeler, at han flere Gange ved anatomiske Undersøgelser af Øren- tviste har fundet Fluelarver i disse.
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