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On the Coleopterous Insects of Galapagos Islands. 1898 On the coleopterous insects of Galapagos Islands. 1898 Linell, Martin L. Washington, D. C.: Smithsonian Instutution Press, 1898 https://digital.library.wisc.edu/1711.dl/VN3XAPVPH6X778H Based on date of publication, this material is presumed to be in the public domain. For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright The libraries provide public access to a wide range of material, including online exhibits, digitized collections, archival finding aids, our catalog, online articles, and a growing range of materials in many media. When possible, we provide rights information in catalog records, finding aids, and other metadata that accompanies collections or items. However, it is always the user's obligation to evaluate copyright and rights issues in light of their own use. 728 State Street | Madison, Wisconsin 53706 | library.wisc.edu fe SMITHSONIAN INSTITUTION. UNITED STATES NATIONAL MUSEUM. 4 ONS THE COLEOPTEROUS INSECTS OF GALAPAGOS ISLANDS. BY MARTIN L. LINELL, Aid, Division of Insects From the Proceedings of the United States National Museum, Vol. XX1, pages 249-268 [No. 1143.] WASHINGTON: GOVERNMENT PRINTING OFFICE, 1898. od CYA AREA OED | Re die oe ite hee eee eB are Oyo ae aes Reece Ease ee Rear Sepia se ase aicheees uIP ee AGT RAE VELL nein crete AR ee ye Team oS oko. Meet race Pa: ead eh ne ee sers ye i eae ase ip we, eae gee eae Pianeta ie eee cele ae Bee eer es tee ss tpegeta eee Si vere aR aereMin iy esr TE Eee Bee Bes Pee eas ee ey ee ey ea ee A SESE BRC anu pees Police a eed ae Ree Segre eee ue eau a Lae Bek tA\ eh Vetch Geb Me pea EEE at LE ik @ ta amet areenee Sipe y ee rt eee get CECE ai ete athe eee ee ees eee Sates ee js ae em pa a yet! ee Re TBE: & = Me eh ge PRE ha oui EE Uae Rs ee ee Pose. Be eS ss eae Be aaron enviven > dS Sree REGO t es ie eee Ber Memes bra een. 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REUSE ean eet ai res ee a 2 : ie os Pie ot E eee Bria) & Bi ee aoe eee erent, 2 . eee 2 is eee ig e teal Fe ee ea ees 2h Weer ae ae aan = Be Ly Be. eee Te sles yeaa aed 38 os ect Eras Sree ae Ks ae ae Peli Reeaee eas a. Srey nna Sees ee eee (rs ess eer pa Meee a eee se as See A eat ane cee ER I i eee 5 gee ems cients as acs = = aenetane peraeee eu UNG pees ieee eee Bere ariet - e ot ie Sena Re St he a east ee ie eae REP pay ees sate, ee at arenes eS aka : ; ase 2 Ms de ae Sie ee Rue eaten e ks 7 ee rea SR Reape get be sSedereage fa On ere Seles ten ge ye ee 2: ON THE COLEOPTEROUS INSECTS OF GALAPAGOS ISLANDS. By Martin lL. LINELL,! Aid, Division of Insects. The general physical features of the Galapagos archipelago have been amply described by Darwin, Salvin, Hooker, and more recently by Alexander Agassiz,’ and need not be repeated here. The extreme poverty of the insect life of these islands is especially alluded to by Mr. Agassiz and particularly illustrated by Dr. Samuel H. Seudder in his account of the Galapagos Orthoptera.’ The whole number of species of this order is 20, including 5 cosmopolitan species. “The coleopterous fauna appears to be relatively equally poor, although, as must be expected from any locality, more numerons in species than the Orthop- tera. Charles Darwin, while on the famous Beagle expedition, collected 29 species, of which Rey. I. W. Hope* described one as new. The re- mainder were reported upon by George R. Waterhouse,’ who described 22 new species and 3 new genera. Of the remaining 6 species 2 were cosmopolitan and 4 were left as doubtfully identical with species pre- viously known from the American continent. In 1852 the Swedish frigate Hugenie touched the islands, and from the Coleoptera obtained there Boheman in 1858 described 6 as new. From that time until 1889 no further mention was made of the Coleoptera of these islands. In that year Dr. L. O. Howard, in his Annotated Catalogue of the Insects Collected in 1887-88 by U. 8. Fish Commission Steamer Albatross,’ lists 12 species determined by the writer, but the presumably new ones are not described. The Albatross again visited the islands in 1891, and 3 species were obtained. Later in the same year Dr. G. Baur, of Clark University, on a special trip to the islands, collected 21 species, which he presented to the U. S. National Museum, as the U.S. Fish Commis- sion had done with the two lots previously mentioned. Although some 1Mr. Linell died May 3, 1897.—Hditor. ‘Trans. Ent. Soc., London, 1837, p. 130. ?Bull. Mus, Comp. Zool., 1892, XXIII, p.56. "Ann. Nat. Hist., 1845, XVI, p. 19. ‘Idem, 1893, XXV,p.1. ®Proc, U.S. Nat. Mus., XII, No. 771. PROCEEDINGS U. S, NATIONA: Museum, VOL. XXI—No. 1143. oie 250 PROCEEDINGS OF THE NATIONAL MUSEUM. Vou. XT, of the forms of the different collectings are identical, there are now rep- resented in the Museum a total of 28 species. By careful examination of this material 8 forms prove to be identical with species collected by Darwin, but none of Boheman’s species have been recognized. Of the remaining 20 species 5 are found to have an extended distribution in tropical America, 1 is cosmopolitan, and 14 are described as new in the following pages. In view of the extreme interest attaching to the biology of these islands, it has been thought advisable to furnish a complete list of the 55 coleopterous species so far known to inhabit this archipelago. The percentage of apterous forms is very large, as will be seen by the list; and another peculiar feature is that they are generally of a smoother sculpture than their congeners of the continent. Of Waterhouse’s species that have been rediscovered, a more explicit description is given, and for one of them a new genus is proposed. Two new Brazil- ian Coleoptera attracted attention in the course of the work of com- parison and are characterized in footnotes. Family CARABIDAE. : CALOSOMA GALAPAGEIUM Hope. Calovome galapageium Horr, Trans. Ent. Soc. London, 1837, II, p. 130. Korm and size of Oychrus stenostomus, apterous, smooth, and very shining. Head black, impunctate; mandibles piceous; labrum and palpi ferruginous. Antennae ferruginous, slightly darker outward, finely rufo-pubescent from the fifth joint, reaching the elytra to one- fourth the length from the base. Thorax black, aeneous at the base, entirely impunctate, slightly wider than long, subcordate, somewhat wider at apex than at base; disk feebly convex, not depressed at the sides; median line distinctly impressed; basal foveae rounded, deep, approximate to the sides; base truncate; posterior angles prolonged and deflexed.
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