186 DIPTEROUS GENUS DIAPHORUS 



28 Diaphorus similis n. sp. 



Male : Length 3 mm. Face and the rather large triangular 

 palpi silvery white; antennae black, third joint subquadrate, with 

 a short point at the upper corner, about as long as broad ( Fig. 

 6) ; arista inserted just above the point on the upper edge; front 

 green with the pollen of the face extending up onto the lower 

 part; latral and inferior orbital cilia white. Dorsum of the 

 thorax bright metallic green with a very little white pollen which 

 forms a spot on each side in the sutural • depression ; pleurae more 

 blackish, covered with white pollen. Abdomen metallic green 

 with coppery reflections, hairs on the dorsum short, black ; ven- 

 ter with a little pale hair ; hypopygium small, with a slender, 

 black organ extending backward along its ventral surface from 

 the base to beyond its tip. Coxae and femora black ; tip of fore 

 coxae and all trochanters yellow ; fore coxae with white hairs on 

 the front surface ; extreme tips of the femora, the tibiae and most 

 of the tarsi yellow ; tips of the fore and middle tarsi and most 

 of the hind tarsi infuscated ; middle tibiae with the usual bristle 

 near the knee ; hind tibiae with several on the upper side and one 

 larger one on the outer side near the knee ; pulvilli of fore and 

 middle tarsi considerably enlarged ; femora with the usual hairs 

 on the lower side. Tegulae, their cilia and the halters yellow. 

 Wings hyaline ; first vein does not reach quite half way to the 

 tip of the second vein ; third and fourth veins nearly straight 

 and parallel beyond the cross-vein. 



Described from one male from Delaware Co., Pa., May 21st. 

 (taken by E. T. Cresson, Jr.) 



Type in the collection of the American Entomological So- 

 ciety. Type No. 6070. 



Two females that seem to belong with this male have the 

 palpi and antennae smaller, and the pollen of the face more gray- 

 ish, the pollen of the thorax thicker and the thorax with coppery 

 reflections. Taken on the same date and at the same place as 

 the male. 



This species is very much like aldrichi, but the color is a 

 pure green, the face appears white in all directions and the -third 

 and fourth veins are not bent as in that species. 



