Vol. XXVIII. pp. 45-48 March 12, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



FOUR NEW NORTH AMERICAN DIPTERA. 

 BY J. R. MALLOCH. 



In this paper I have described four new species of Diptera, 

 the types of three of which are in the collection of the Illinois 

 State Laboratory of Natural History. The type of Chironomus 

 macateei is in the collection of W. L. McAtee, Washington, D. C. 



Chironomus macateei and Metriocnomus annuliventris belong to 

 Chironominse, Sapromyza littoralis to Sapromyzida;, and Meoneura 

 nigrifrons to Milichinse, a subfamily of Agromyzidse. 



The figures of the hypopygia present one side only, viewed 

 froriD above. 



This paper is published by permission of Dr. S. A. Forbes, 

 State Entomologist of Illinois. 



Chironomus macateei n. sp. 



Male.— Vale yellow, subopaqne. Antennal flagellum pale brownish, 

 plumes and palpi yellow. Abdomen yellowish, green at base, yellow on 

 apical half, seventh segment and basal portion of hypopygium black. 

 Legs yellow, the hind tibiae with the usual black apical comb, wings 

 clear, veins pale yellow, cross vein clear. Halteres yellow. Hairs on 

 body and legs whitish yellow. 



Frontal tubercles indistinguishable ; antennae elongate, about 1)4 times 

 as long as head and thorax together. Hypopygium as Figure 1, the 

 inferior process much elongated. Legs slender, fore tarsi without long 

 hairs, basal joint one-fifth longer than fore tibiae (42:35), second joint 

 one-tenth longer than third (22:20); mid and hind legs with long hairs. 

 Wings rather broad and short, third and fourth veins ending at equal 

 distances before and behind apex, respectively; cubitus forking dis- 

 tinctly, but not greatly beyond the cross vein. 



Female.— Agrees with male in color except that the abdomen has only 

 one black mark, that on the seventh dorsal segment. 



Leg proportions and wing venation as in male. 



5— Pkoc. Biol. Soc. Wash., Vol. XXVIII, 1915. (45) 



