Milichiella dolichosurstyla
Content
Description
Male coloration: Black, except for yellow basomedial part of basoflagellomere, first three tarsomeres of all legs, which are dark dorsally and yellow ventrally, and yellow setulae ventrally on distal tip of tibia and first tarsomere of foreleg and on first two tarsomeres of hindleg. In paratype, palpus appears to be reddish and base and tip of tibiae are paler. Wing hyaline, veins light brown; halter stem brown, knob appears quite pale, only basally and distally darker.
Head: Eye 1.6x as high as long, notch in posterior eye margin about 0.08x the length of eye. Posterior orbital seta absent. Palpus with short setulae at tip and a few slightly longer setulae ventrally.
Thorax: Mesonotum appears to be dull. Two dorsocentral, 1 prescutellar, 1 presutural, and 1 long and 1 shorter (>0.5x) katepisternal setae.
Wing: R4+5 and M1 converging, costal section between R4+5 and M1 ~0.6x as long as section between R2+3 and R4+5. Notch at subcostal break extending about breadth of costa into wing plane. Ultimate section of M1 about 2.3x length of penultimate section. Wing length: >1.9 mm.
Abdomen: Tergites 2-5 black, but there may be a narrow silvery microtomentose line at the posterior margins. T5 is covered by an airfilm in holotype. Tergite and sternite 5 with sparse setulae. Male genitalia with surstylus longer than height of epandrium (Fig. 13).
Body length: >2.0 mm.A
A. Brake 2006: Diverse Milichiella Giglio-Tos (Diptera: Milichiidae) in Miocene Dominican amber. – Insect Syst. Evol. 37: 17-26
Head: Eye 1.6x as high as long, notch in posterior eye margin about 0.08x the length of eye. Posterior orbital seta absent. Palpus with short setulae at tip and a few slightly longer setulae ventrally.
Thorax: Mesonotum appears to be dull. Two dorsocentral, 1 prescutellar, 1 presutural, and 1 long and 1 shorter (>0.5x) katepisternal setae.
Wing: R4+5 and M1 converging, costal section between R4+5 and M1 ~0.6x as long as section between R2+3 and R4+5. Notch at subcostal break extending about breadth of costa into wing plane. Ultimate section of M1 about 2.3x length of penultimate section. Wing length: >1.9 mm.
Abdomen: Tergites 2-5 black, but there may be a narrow silvery microtomentose line at the posterior margins. T5 is covered by an airfilm in holotype. Tergite and sternite 5 with sparse setulae. Male genitalia with surstylus longer than height of epandrium (Fig. 13).
Body length: >2.0 mm.A
Discussion
This species is similar to Milichiella hendeli Brake, 2000, which occurs in California, and M. tristis Lamb, 1914, which occurs in Africa. Both have pale halters, pale tarsi, and black tergites. Milichiella hendeli has red palpi with black tips and red tibiae, similar to the paratype of M. dolichosurstyla n. sp. Milichiella tristis has only 1 dorsocentral seta instead of 2 setae. The male genitalia of both species are undescribed.B
B. Brake 2006: Diverse Milichiella Giglio-Tos (Diptera: Milichiidae) in Miocene Dominican amber. – Insect Syst. Evol. 37: 17-26