Sif 
is more or less banded with yellow on the posterior margin of the seg- 
ments. The wing veins are light brownish for the most part; the costa 
and outer half of subcosta, the stigma, and the bases of most of the 
veins reaching the body of both fore and hind wings are nearly hyaline, 
Male.—Lenegth 6 to 7.5 mm.; rather slender, elongate, shining; struc- 
tural details in general as in female; head not narrowed back of com- 
pound eyes; frontal crest is less distinctly raised and more distinctly 
notched; antemme not compressed, almost as long as the body, and the 
nodes are distinctly enlarged, angular, clothed with distinct, rather 
short, black pubescence, third joint very robust and third to fifth sub- 
equal; procidentia very broad, slightly tapering and rounded at apex; 
hypopygium more or less excavated at tip. Color black; tips of fem- 
ora, tibie, and hypopygium yellowish, infuscated; tarsi, cerci, and tips 
S FETENS. 
Fia. 9.—Pachynematus extensicornis: a, eggs in wheat; b, young larvie; ¢, mature larva; d, cocoon; 
e, adult male; f, adult female; a@ and b, natural size; ¢ to f, enlarged. (rom Insect Life.) 
of tibiwe more distinctly infuscated; posterior orbits tinged with fulvous; 
veins dark brown; stigma and costa yellowish brown, the former lighter 
at center. 
Represented by many specimens of both sexes, some of them reared 
from larvie taken on wheat in Indiana by Mr. Webster and others 
collected throughout the Northeastern United States. (Colls. U. 5. 
Nat. Mus., Am. Ent. Soe., and Cornell Univ.) 
6. Pachynematus affinis new species. 
Female.—Length 5.5 to 6 mm.; very robust, shining; head greatly 
dilated back of eyes; clypeus very broadly and not deeply excavated, 
15449—No. 3 7 
