THE GENUS TACHINOMYIA — WEBBER 289 



bristles present, directed forward, no orbital bristles in male; antenna 

 reaching lowest fourth of face, third segment at apex, outwardly 

 truncate, inwardly rounded; second segment somewhat elongate, in 

 female sometimes more than one-half length of third; arista bare, 

 second segment short; frontal bristles extending below base of third 

 antennal joint; front without evenly paired reclinate bristles outside 

 of frontal row ; no outer vertical bristle in male ; paraf acialia bare, at 

 narrowest part ranging from less than one-half to more than one-half 

 distance between vibrissae ; face moderately to strongly receding ; pro- 

 boscis short, fleshy; cheeks usually broad, never less than one-fifth 

 eye height ; vibrissae situated on or usually above oral margin ; palpi 

 well-developed. Thorax with three or four dorsocentral and three 

 sternopleural bristles; pteropleural bristle normal; apical scutellur 

 bristles present ; infra squamal spinules absent. Abdomen black or 

 brownish in ground color, poUinose, decidedly elongated in male, 

 shorter and stouter in female ; median marginal macrochaetae present 

 on all segments, second segment never with more than four macro- 

 chaetae ; discal macrochaetae absent in all except dakotensU ; no ven- 

 tral carina, male hypopygium prominent, anal forceps azygous; lobes 

 of tenth sternite broad at base, each terminating in a small fingerlike 

 process at each side of the hooklike anal forceps. Hind tibia irregu- 

 larly ciliate, middle tibia with two or more strong bristles on outer 

 front side, near middle ; claws and pulvilli in male conspicuously long. 

 Wings long, with the usual tachinid venation; first posterior cell 

 open, ending considerably before apex of wing; bend of fourth vein 

 destitute of a distinct appendage but frequentlj^ with a faint fold; 

 last section of fifth vein less than one-half as long as the precedin 

 veins bare except base of third. 



to 5 



KEY TO SPECIES OF TACHINOMYIA 



MALES 



1. Abdomen without discal macrochaetae 2 



Abdomen with discal macrochaetae dakotensis, new species 



2. Abdomen black ; two reclinate upper frontal bristles 3 



Abdomen broadly red at sides, fourth segment wholly red except 



at base; three reclinate upper frontal bristles; parafacialia 

 at narrowest less than one-half width of third antennal seg- 

 ment (Florida) fioridensis Townsend 



3. Hind tibiae inwardly with long villosity (fig. 17, g), the villi 



often over twice the tibial width in length ; lobes of fifth ster- 

 nite, at base, with conspicuous flange 4 



Hind tibiae inwardly with short villosity, the villi scai'cely the 

 tibial width in length; lobes of fifth sternite without basal 

 flange, their inner edges smooth or with a conspicuous elon- 

 gated ridge 5 



