Vol. Xxix] ENTOMOLOGICAL NEWS. 147 



each armed with a long subapical bristle on anterior surface ; dorsal 

 surface of hind tarsi with sparse, fine, upright hairs. Costa ending 

 slightly before middle of wing, its divisions j:2 1/ 2 :\\ fringe very short 

 and close ; fourth vein regularly arcuate, ending as far before apex of 

 wing as fifth does behind it. 

 Length, 2 mm. 



Type locality, Havana, Illinois, August 30. Taken in a 

 sand "blowout." 



This species differs in the chaetotaxy of frons, color of 

 abdomen and halteres, and number of scutellar bristles from 

 automata Malloch, which it most closely resembles. The only 

 species with black halteres which is known to me is aridus 

 Malloch, which is I mm. in length and has the third an- 

 tennal joint rounded. 



Aphiochaeta quadripunctata sp. n. 



$. Black. Frons rather glossy, pleurae glossy, abdomen, with ex- 

 ception of hypopygium, opaque. Antennae dark brown; palpi pale yel- 

 lowish ; legs stramineous, mid and hind coxae and femora fuscous. 

 Wings clear, veins black, 2 large oblong black spots near apex of 

 wing, one on fourth vein and the other on fifth, both of which 

 extend along the course of vein to margin of wing. Halteres black, 

 knobs stramineous. 



Frons slightly broader than high; lower transverse series of 

 bristles convex, the inner one on each side slightly lower than outer 

 and much closer to the latter than to the upper post-antennals ; 4 strong 

 post-antennals present, the lower pair little closer than the upper ; 

 antennae of moderate size, third joint rounded; arista very slender, 

 pubescent, nearly twice as long as height of frons; palpi larger than 

 antennae, armed with a few strong setulae. Mesopleurae with a 

 number of setulae on upper posterior third; scutellum with 2 strong 

 bristles and 2 weak anterior hairs. Abdomen subconical, with very 

 short setulae ; hypopygium small. Legs slender, fore tarsi short and 

 distinctly thickened; hind tibiae with weak setulae on their postero- 

 dorsal surfaces. Costa to middle of wing, first section slightly longer 

 than 2+3, third slightly more than one-third as long as second; 

 fringe of moderate length; fourth vein regularly arcuate, ending as 

 far before apex of wing as fifth does behind it. 



Length, 1.5 mm. 



Type locality, Elizabeth, Illinois, July 8. 



No described species of this genus has the wings spotted as 

 this one. In 1912 I described coiu/louicriila which has a black 

 spot at apex of wing, but in this species the spot consists of 

 numerous microscopic black hairs and n>t of a dark pigmen- 

 tation of the membrane as in quadripunctata. 



