ICHNEUMON-FLIES GELINAE : MESOSTENINI 135 



mesopleurum and metapleurum, finer and sparser punctures on sec- 

 ond tergite, and slightly different course of the apical carina of pro- 

 podeum, which in latus tends to turn forward a little more sublaterally 

 at the position of the propodeal crests. 



Ischnus latus is even closer to the Nearctic /. cinctipes, and is 

 conceivably only subspecifically distinct. Besides the color differ- 

 ences, which are not impressive, it differs in a slightly more robust 

 body, longer male tyloids which are parallel to long axes of their 

 segments, more shiny lateral lobe of mesoscutum, stronger and more 

 punctate sculpture of mesopleurum and metapleurum, w^eaker for- 

 ward bowing of median part of apical carina of propodeum, and 

 slightly smaller punctures on second tergite. These structural differ- 

 ences, however, are only average, all of them bridged by individual 

 variation in both species. The difference in form of the male tyloids 

 seems to be more constant, and in determining specimens has been 

 used as a deciding character in doubtful cases. 



There are two subspecies, as keyed and described below. We have 

 seen no real intergrades. 



1. Hind coxa black or blackish; range: Atlantic to Rocky Mountains in Canadian 



zone la. latus latus (Provancher) 



Hind coxa fulvous or ferruginous; range: Atlantic to Minnesota, in Transition 

 zone lb. latus pinguis (Provancher) 



la. Ischnus latus latus (Provancher) 



Crypius latus Provancher, 1874, Naturaliste Canadien, vol. 6, pp. 178, 204; 9 



Type: 9, Quebec (lost) 

 Phygadeuon S-annulatiis Provancher, 1882, Naturaliste Canadien, vol. 13, p. 335, 



355 (Faiuie, p. 777); 9- Name preoccupied by Gravenhorst, 1829. Type: 



9, Quebec (Quebec). New Synonymy 

 Cryptus 3-annulatus Provancher, 1886, Additions et corrections au volume ii de 



la faune entomologique du Canada traitant des hymenopt^res, p. 74; cf. 



Type: cf, Ottawa, Ont. (Ottawa). 

 Ischnus fraterculus tricircularis Walkley, 1958, U.S. Dep. Agr., Agr. Monog., No. 



2, suppl., p. 46. New name for Phygadeuon 3-annulatus Provancher. 



Coxae black or blackish; first trochanters of front and middle legs 

 brown or fuscous, their apices and sometimes the front side (usually 

 in males) , white ; second trochanters of front and middle legs white in 

 males, white, fulvous, or brown in females; first trochanter of hind 

 leg brown or fuscous; second trochanter of hind leg fulvous to brown, 

 in male sometimes partly white. 



