THE CANADIAN ENTOMOLOGIST. 119' 



Locality: Champaign, Illinois, "swept from amongst grass an i 

 weeds," May 30, 1889 (Marten). 



Type: Illinois State Lab. Nat. Hist, collection. 



This species may be separated from any previously describe 1 

 form by the obtuse frontal triangle. It is most closely allied 

 glabra Meigen. 



Ghloropisca glabra, var. clypeata, n. var. 



This variety may be separated from the type form its by being 

 larger, 3 mm., in having the third antennal joint Vi times as lo.i i 

 as broad, the clypeus yellow, instead of black as in glabra, and the 

 sternopleura without the black spot. 



Localities: Algonquin, Illinois, September 21, 1894 (\V. A. 

 Nason), Urbana, Illinois, swept from catalpa, June 21, 1883 

 (Marten); Urbana, Illinois, July 15, 1887, in woods (C. A. Hart). 



This form may really be a distinct species, but colour alone is 

 not a reliable guide to the separation of species in this genus, an 1 

 till I see more material, I consider it best to give the form variet tl 

 rank only. 



Pseudochlorops, n. gen. 



The type species of this. genus is Chlorops unicolor Loew. It 

 differs from Chlorops in having a distinct sensory area on the hin 1 

 tibia, and from Chloropisca in having the scutellum convex. 



Prohippelates Malloch (Pr. U. S. N. M., 1913). . 



The type of this genus is Hippelates pallid its Loew. This genus 

 and its allies, Hippelates, Pseudohippelates and Ceratobarys, have 

 been dealt with in a paper which I have now in the press. 



Pseudohippelates Malloch (Pr. U. S. N. M. ( 1913). 



The type of this genus is Pseudohippelates capax Coquillett. 



Siphunculina Rondani. 



To this genus belongs Siphonella reticulata Loew. 



Neogaurax, n. gen. 



The type of this genus is Gaurax montanus Coquillett. It 

 differs, as indicated, in the foregoing table, from Gaurax in the. 



