ANASIMYIA 57.B
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57.a. Tergites 2-5 completely shiny › 58 ANASIMYIA 57.b. Tergites 2-5 dull in the middle, shiny at the margins, creating a large, median dull area on the abdomen › 59 Introduction 58.a. Thorax and abdomen black. Males: Anasimyia frequent marshy areas and the eyes meet on frons › Melanogaster banks of waterways, where they fly around Rondani partim (p. 134) the vegetation or just above the water. They 58.b. Thorax and abdomen greenish, for visit the many flowers along the banks, such one species partly purple to reddish. as Mentha, Lysimachia and Iris. Anasimyia lin- Males: eyes separated on frons › eata is the most common species and is fre- Lejogaster Rondani (p. 125) quently encountered on the water’s edge. A. lunulata is the rarest, and is found in similar 59.a. Sternite 1 dull; tergite 2: dull; ter- habitats to Parhelophilus consimilis. Both are gites velvety black or black with purple or green sheen; wing: tm ends perpen- dicular to R4+5 (and is nearly straight) or it ends in a sharp angle towards the 64. wing tip (figure 60). Male: facial knob more or less developed › 60 curved 59.b. Sternite 1 shiny; tergite 2: shiny on middle; tergites with green to bronze colour; wing: tm ends perpendicular to R4+5 (in this case, middle part of tm bent inwards) or it ends towards the wing base and angular (figure 61). Male: facial knob absent › 61 60.a. Antennae black; thorax and abdomen black › Melanogaster 65. Rondani partim (p. 134) 60.b. Antennae red; thorax and abdomen black with purple or greenish sheen triangular › Chrysogaster Meigen (p. 80) 61.a. Wing: tm ends perpendicular to R4+5 and middle part of tm bent inwards, creating an S-shaped vein (fig- ure 62) › Riponnensia Maibach, Goeldlin & Spheight (p. 196) 61.b. Wing: tm ends towards the wing base on R4+5, the last part recessive, 66. creating an angular vein (figure 61) › Orthonevra Macquart (p. 151) hooked pointed figure 64. Anasimyia interpuncta, male abdomen. figure 65. Anasimyia lunulata, male abdomen. figure 63. Anasimyia lineata, head of male figure 66. Anasimyia transfuga, male (Verlinden). abdomen (Verlinden). 37 67. 72. contracted 73. hooked 68. face produced curved figure 72. Anasimyia interpuncta, head of male 69. figure 73. Anasimyia lunulata, head of male (Verlinden). elongate 70. hooked peatland species, a habitat that is becoming increasingly rare in Northwest Europe. The long-tailed larvae live in pools and ponds where decaying vegetation, particularly from Typha, accumulates (Rotheray, 1993). 71. Recognition Small hoverflies with longitudinal pale stripes of dust on a black thorax and pale contracted grey, yellow or orange markings on the abdomen. Where Helophilus and Parhelo - hooked philus appear yellowish, Anasimyia species appear much paler, almost grey on black. Face without bare stripe, in contrast to Helophilus. Key figure 67. Anasimyia contracta, male abdomen. 1.a. Mouth edge not forming a pointed figure 68. Anasymia interpuncta, female snout (figure 72, figure 73); wing: stigma represented by a darkened cross vein › 2 abdomen. 1.b. Mouth edge strongly protrudes for- figure 69. Anasimyia lunulata, female wards like a pointed snout (figure 63); abdomen. wing: stigma represented by a dark patch figure 70. Anasimyia transfuga, female between the veins. 8-9 mm. Holarctic dis- abdomen. tribution › Anasimyia lineata Fabricius figure 71. Anasimyia contracta, female Jizz: face long pointed, males greyish, females yel- abdomen (Verlinden). lowish. 38.