6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



— Forceps viewed from behind, at their widest part, scarcely one-fourth 



their length ; front tarsi of female noticeably thicliened ; posterior spira- 

 cles of puparium situated on longitudinal axis 3. anisotae, new species. 



13. Inner forceps of male genitalia, when viewed in profile, nearly straight 



or, at most, slightly bowed on their outer side, variable in length, form, 

 and pigmentation ; outer forceps slender. Sides of front in male mod- 

 erately hairy, not thiciily beset with minute hairs; posterior spiracles 

 of puparium situated on longitudinal axis. 



1. frenchii (Williston and complex. 



— Inner forceps of male genitalia, when viewed in profile, distinctly bowed 



or straight for one-half their length and then inclined forward ; outer 

 forceps stout Sides of front in male densely beset with minute black 

 hairs ; posterior spiracles of puparium situated above the longitudinal 

 axis 2. euchaetiae, new species. 



14. First two segments of abdomen destitute of marginal bristles 15. 



— First segment of abdomen without, second segment with, margi- 



nal bristles 19. 



15. Hind tibiae evenly ciliate with one longer bristle 17. 



— Hind tibiae evenly ciliate without a longer bristle 16. 



IG. Inner eye margins but slightly diverging below ; face and front cinereous ; 



abdomen brown or yellowish with a well-defined dorsal vitta. 



16. rileyi (Williston). 



— Inner eye margins widely diverging below ; front and face golden pollinose ; 



abdomen yellowish, thinly gray pollinose, without clearly defined 

 vitta 17. laniiferae, new species. 



17. Head, thorax, and abdomen densely covered with golden pollen. 



19. spectabilis (Aldrich), 



— Head, thorax, and abdomen black, grayish pollinose, at most with sides of 



second and third segments reddish 18. 



18. Third antennal joint in both sexes at least three times the length of 



second; eyes distinctly pubescent under high magnification (if eyes 

 are bare, front at widest part over eye width, see archippivora or 

 schiztirae) 12. aletiae (Riley). 



— Third antennal joint in both sexes scarcely twice the length of second; 



eyes completely bare 6. cuculliae, new species. 



19. Hind tibiae evenly ciliate with one longer bristle 22. 



— Hind tibiae evenly ciliate witliout a longer bristle 20, 



20. Abdomen black, gray pollinose ; third antennal joint in both sexes at least 



three times the second 21. 



— Abdomen brown or yellowish with a well-defined median vitta ; third an- 



tennal joint in both sexes hardly twice the second ; marginal bristles 

 of the second abdominal segment weak or vestigial. 



16. rileyi (Williston). 



21. Median marginal bristles of second abdominal segment strong; hind 



tibiae densely ciliated ; lai'ge form, 10-12 mm. in length. 



15. piperi (Townsend). 



— Median marginal bristles of second abdominal segment weak but constant 



in their appearance ; hind tibiae moderately ciliated ; medium sized forms 

 8-9 mm. in length. Thorax thickly gray pollinose with yellowish tinge 

 (particularly noticeable when a series of specimens is observed) ; facial 

 ridges usually bristly one-half way to antennae, sometimes a little less; 

 front and face cinereous, the former witli slight yellowish tinge, especially 

 in female. This species is exceedingly close to aletiae but differs from 



