NORTH AMERICAN DIPTERA. 95 



in V. (1. Wulp's figure. In the New York specimen tlie third and 

 fourth veins have coalesced before the margin of the wing and sepa- 

 rated again at the margin, giving the appearance of a very small 

 second apical cell. The Pennsylvania specimen has a slight' stump 

 at bend of fourth vein, while the others are entirely without stump, 

 at most witli wrinkle. 



Ciiphocera inacrocera Wd. 



Two specimens from Portland, Jamaica (C. W. Johnson), I am 

 inclined to regard as this species. The antennae are wholly light 

 rufous, more or less yellowish on third joint. The fourth vdn has 

 a slight stump at bend, and the apical cross-vein is concave. 



Gymiiocha>ta alcedo Loew. 



One 9 specimen from Pennsylvania (C. W. Johnson). The palpi 

 are black at base. 



Gonia froiitosa Say. 



One specimen from Illinois, May (Westcott) ; one S. Illinois (Rob- 

 ertson) ; two Nebraska, March-April (Bruner) ; seven Iowa, all but 

 two April 18th (Osborn) ; two Minnesota? (Lugger) ; twenty-five 

 from Brookings, S. Dakota, April 11th— June 11th, m coi7« April 

 11th (Aldrich); two from Colorado (Gillette) ; eleven from Ottawa, 

 Canada, April 19th— 20th (Harrington). Many of the S. Dakota 

 males are very small, only 7 mm. 



Goiiia exul Will. 



This species graduates into G. frontom, and is very hard to sepa- 

 rate from it in some cases. As nearly as I can decide, I have thir- 

 teen specimens: two S. Illinois (Robertson); one Illinois, April 

 (Westcott) ; one Constantine, Mich., August 22d ; one Iowa, April 

 18th (Osborn); one Minnesota? (Lugger); and seven from Brook- 

 ings, S. Dakota, May Uth— June 14th (Aldrich). 



Gonia seqiiax Will. 



I have thirty-one specimens that I refer to this species, although 

 the claws of the % are nearly or quite as long as last tarsal joint: 

 four from Kansas, June ; twenty -six from Las Cruces, N. Mexico, 

 June 3d— September 25th; also one from Orono, Me. (Harvey), 

 which is apparently the same species. 



Gonia i»allc>n!« Wd. 



Four specimens from Portland, Jamaica. April — May (C. W. 

 Johnson). 



TKANS. AM. ENT. SOC. XIX. APRIL 1892. 



