494 



ending at beginning of apical curve of wing, the cell enclosed by it rap- 

 idly narrowing apically ; cross vein very little before middle of wing ; 

 cubitus forking very slightly before cross vein. 



Length, 3 mm. 



Type locality, Easton, 111., taken by sweeping vegetation along 

 bank of Central Dredge Ditch, May i, 19 14 (C. A. Hart and J. R. 

 Malloch). 



This is very probably the species listed by Johannsen as gmundcn- 

 sis Egger. I can not reconcile the above description w'ith Egger's de- 

 scription of gimtndcnsis or with Schiner's later description of it. 

 Johannsen based his identification of the European form upon material 

 obtained from Europe, but there seems to me very good grounds for 

 rejecting the identification as erroneous, although possibly he made no 

 mistake in associating his American examples with the European ones. 

 I assume that I am correct in my inference as to what species Johann- 

 sen had before him, since I have examined a specimen in the collection 

 of the U. S. Bureau of Biological Survey, from Plummer's Island, 

 Md., which bears Johannsen's MS. label "gmiindcnsis." 



12. Tanytarsus muticus Johannsen 



Tanytarsus muticus Johannsen, Bull. 86, N. Y. State Mus., 3905, p. 294. 



Female. — Yellow, slightly shining. Head yellow, apical joint of 

 antennae fuscous. Mesonotum with reddish vitt?e. Abdomen green. 

 Legs yellow, fore pair slightly brownish. Wings clear, veins yellow. 



Pronotum linear; mesonotum protruding anteriorly. Basal joint 

 of fore tarsi one fourth longer than fore tibi?e, proportions of tibiae and 

 first and second tarsal joints, 20, 25, 14. Third vein ending just be- 

 yond beginning of apical curve of wing; distance from base of first 

 vein to cross vein less than one half that from cross vein to apex of 

 wing (22 : 51) ; cubitus forking conspicuously beyond cross vein. 



Length, 1.75 mm. 



Illinois locality, Urbana, October, 19 14, at light I'C. A. Hart and 

 J. R. Malloch). 



The male of this species was described by Johannsen from Ithaca, 

 N. Y. I have not seen this sex, but have little hesitation in associating 

 the female described above with Johannsen's species. 



The early stages are undescribed. 



13. Tanytarsus similatus, n. sp. 



Male. — Blackish brown. Head black, flagellum and plumes of an- 

 tennae fuscous. Thoracic vittae glossy black, spaces between them 



