166 DIPTEROUS GENUS DIAPHORUS 



33 Hypopygium large and conspicuous. 11, nigrescens Aid. 



Hypopygium normal. 34. 



34. Fore coxae with a few minute pale hairs and black bristles. 



29, sodalis Loew. 

 Fore coxae with black hairs and bristles. 35. 



35. Middle tibiae with two prominent bristles on the front 



side, one near the base and one at the middle ; thorax vit- 



tate. 30, trivittatns n.sp. 



Middle tibiae with only one bristle which is near the base ; 



thorax not vittate. 31, dnbiits Aid. 



36. Male with very large, pendant, white palpi. 



34, am oe ii its Aid. 

 Male with the palpi normal. 37. 



37. Eyes of the male not contiguous. 38. 

 Eyes of male contiguous. 42. 



38. Front and thorax with little pollen ; tip of abdomen of male 



without stout bristles. 35, parvitlus Aid. 



Front with considerable pollen ; tip of abdomen with dis- 

 tinct bristles. 39. 



39. Face narrower than the front ; thorax with or without a 



bronze vitta. 36, variabilis n.sp. 



Face wider than the front. 40. 



40. Fore coxae black. 41, femoratus n.sp. 

 Fore coxae yellow. 41. 



41. Venter yellow. 6, ventral is n.sp. 

 Venter not yellow. 37, subscjiinctits Loew. 



42. Middle and hind coxae infuscated for half their length ; 



antennae black. 40, deceptivus Aid. 



Fore and hind coxae altogether yellow, middle coxae dark- 

 ened at base ; antennae partly yellowish. 43. 



43. Thorax with but little pollen; abdomen without stout bris- 



tles at tip. 38, flavipes Aid. 



Thorax with thick yellowish pollen ; bristles at tip of ab- 

 domen short but distinct. 39, mundiis Loew. 



