336 



Originally described from Massachusetts. The male is undescribed. 



Early stages and habits of adult unknown. 



Coquillett states that the eyes are very widely separated, but in the 

 specimen before me they are only narrowly so, though the vertex has 

 the eyes widely diverging posteriorly, which may be what Coc|uillett 

 saw instead of the frons. 



7. JOHANNSKNOMYIA .;EQUALIS, n. Sp. 



.Male. — This species agrees in coloration and size with polita, ex- 

 cept that the halteres are brown and the antenna! flagellum on basal 

 half and its plumes are yellow. 



The eyes are widely separated; antenna slightly longer than head 

 and thorax combined, basal joint of flagellum one and a half times as 

 long as second ; apical five joints elongated. Mesonotum not so highly 

 polished as in polita, the hairs and their disposition similar to those 

 of that species. Abdomen short ; the hypopygium exceptionally large, 

 about equal in length to remainder of abdomen, basal portion of lat- 

 eral arm about four times as long as its diameter, apical portion about 

 two thirds as long as basal, its apex in the form of a long slender hook. 

 Legs slender ; basal joint of hind tarsi slightly longer than remaining 

 joints together; fifth tarsal joint unspined; tarsal claws rather small, 

 equal on all legs. Third vein to four fifths the wing-length ; first, dis- 

 tinctly short of middle of third ; media forking distinctly in front of 

 cross vein, the base of posterior branch indistinct ; cubitus forking be- 

 low cross vein. 



Length, 1.5 mm. 



Type locality, Muncie, 111., on bank of Stony Creek, July 5, 1914 

 (T. R. Malloch). Paratvpes from Centerville, 111., August 16, 19 14 

 (J. R. Malloch). 



This species is remarkably close to polita in color, and as the male 

 of the latter in all probability has the claws of the tarsi subequal it is 

 likelv to be difficult to separate the males of the two species. The prin- 

 cipal reason why I have accepted this as distinct from polita is because 

 of the difference in venation. It is, I believe, a general rule that where 

 the elongation of the third vein is unequal in the sexes, the greater 

 elongation is in the female. Should the male described herewith prove 

 ultimately to be that of polita it will be an exception to the rule. As 

 indicated in the key to species, ccqualis is also closely related to cau- 

 delli. 



Female and earlv stasres unknown. 



