246 KANSAS UNIVERSITY QUARTERLY. 



black, on the sides red; second' segment with a yellowish or reddish 

 band subinterrupted in the middle (where it is about one-sixth the 

 width of the segment, and does not quite reach the anterior margin), 

 on the sides strongly dilated, extending from the anterior nearly to 

 the posterior margin; behind this band the segment is black in the 

 middle and brown on the sides; third segment similar to the second 

 except that posteriorly it is broadly reddish or brownish; fourth seg- 

 ment wholly yellow, except narrowly in front; hypopygium brown. 

 Legs reddish brown, basal half of tibiae yellow, hind femora above 

 and behind black, except at the base and tip. Wings subhyaline, 

 brown on the anterior half, the costal cell is hyaline and the first and 

 second basal cells are brown. — Length 11 mm. 



One specimen, taken by Mr, Hugo Kahl near the summit of "Little 

 Baldy" in the Magdalena range, N. M., an altitude of more than 9000 

 feet (August). 



A very beautiful species and markedly different from its congeners. 



Oeria abbreviata Loew. 



A female specimen from Colorado (Gillette, No. 593) agrees very 

 well with specimens from the White mountains, N. H. The third 

 antennal joint is brownish rather than black and the scutellum is 

 almost entirely yellow. Known hitherto from New England, Virginia, 

 Florida. 



Ceria tridens Loew. 



A male and a female, LasCruces, N. M. (Townsend: male, April 8; 

 female, June 21). — A western species. 



Ceria townsendi, n. sp. 



Red species, varied with yellow. Face yellow; antennal process 

 less than half the length of tha first antennal joint; dorsum of meso- 

 notum black; scutellum yellow; second abdominal segment narrowed 

 basally; second, third and fourth segments with yellow posterior 

 bands; the slight angle of the last section of the third longitudinal 

 vein emits a stump of a vein into the posterior cell. 



Male. Face with a slight tubercle; yellow; in the middle with a 

 ferruginous stripe concolorous with and proceeding from the short an- 

 tennal process; this median stripe is widest nearest its middle and 

 bounded laterally by two narrow blackish stripes that come together at 

 the oral margin; just before the yellow cheeks are two distinctly separ- 

 ated oblique black stripes proceeding from eye to oral margin. Antennae 

 brown, first joint reddish, slender, nearly as long as the two following 

 joints together; third joint distinctly shorter than the second. Ver- 

 tex yellow, swollen; ocellar area blackish; frontal triangle shining 



