198 THE CANADIAN ENTOMOLOGIST. 



vein, extending along fifth vein to base of discal cell, bright yellow, 

 remainder of wing from costa to fifth vein dark brown, a streak in outer 

 half of discal cell, a fascia across middle of first posterior cell, sometimes 

 interrupted, and nearly whole of second posterior cell, hyaline ; wings 

 behind fifth vein smoky gray; apex of first vein and the costa from apex 

 of auxiliary to midway between apices of second and third veins, bright 

 yellow ; halteres yellow ; length, 7 to 9 mm. Fifty-six specimens, of both 

 sexes, collected August nth to 27th. 



Habitat. — Sierra Madre, Chihuahua, Mexico (head of Rio Piedras 

 Verdes, about 7,300 feet altitude). 



Type.— Cat. No. 6294, U. S. N. M. 



My op a p 11 1 c lira, new species. 



Differs from /enestrata as follows : Sides of face with only the 

 uppermost brown spot, sides and hind margin of mesonotum, entire 

 scutellum, broad sides of first two abdominal segments, front corners of 

 the third and middle of the last segment, yellow ; mesonotum marked 

 with four velvet black vittte ; yellow on bases of wings more extended, 

 including the fourth vein to base of discal cell, hyaline fascia of first 

 posterior cell reduced to a subtriangular spot next to the fourth vein, 

 wings behind fifth vein nearly pure hyaline ; length, S mm. Five 

 specimens, of both sexes, collected August 26th to September 2nd. 



I/ad/tat. — Same as the preceding species. 



Type.— Cat. No. 6295, U. S. N. M. 



Sicus brevirostris, new species. 



Face and cheeks pale yellow, front reddish yellow, the upper 

 corners and occiput black, antennae reddish yellow, inserted nearly 

 length of last two joints from the adjacent eye, first and third joints 

 slightly longer than broad, the second as wide as long, slightly shorter 

 than the third, mouth-parts black, last section of proboscis less than 

 one-third as long as the preceding section ; body black, grayish pruinose, 

 apex in male and whole of genitalia of female polished, second and third 

 abdominal segments in the male in ground colour largely yellow; legs 

 black, the knees yellow; wings hyaline, tinged with gray at the base and 

 in the costal cell, first posterior cell closed and petiolate ; halteres yellow; 

 length, 4 mm Four males and three females collected August 29th to 

 September 7th. 



Habitat. — Same as the preceding species. 



Type.—ZzX. No. 6296, U. S. N. M. 



