ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 



161 



Key to the Nearctic species of Acropimpla 



1. Apical part of male clasper short (fig. 359); ovipositor preapically with an 

 even dorsal curvature (fig. 330,i) ; second recurrent vein usually conspicu- 

 ously before outer end of areolet; apical fuscous area on hind femur occupy- 

 ing about 0.25 the length of the femur, not sharply limited basally (fig. 321, h) . 



1. pronexus, new species 



Apical part of male clasper long (fig. 360) ; ovipositor preapically with a weak 



dorsal angle (fig. 331, a) ; second recurrent vein usually at or very near outer 



end of areolet; apical fuscous area on hind femur occupying about 0.15 the 



length of the femur, sharply limited basally (fig. 321, i). 



2. alboricta (Cresson) 



1. Acropimpla pronexus, new species 



Figures 321,h; 330,i; 359 



Front wing 4.0 to 7.7 mm. long. Similar to T. alboricta except 

 in the characters mentioned in the key. The black bands on the 

 hind tibia are rather frequently connected ventrally by a brownish 

 stripe. 



This new species is very close to A alboricta but is certaiuly distinct. 

 We are indebted to G. S. Walley for calling our attention to it, and 

 for supplying most of the specimens on which the description is 

 based. 



Type: d\ reared from Glypta fumiferanae, Searchmont, Ont., 

 emerged in incubator Feb. 19, 1944, W. R. Brown (Ottawa). 



Paratypes: cf, Beaverlodge, Alta., June 21, 1931, E. H. Strickland 

 (Townes). 2d", reared from Choristoneura fumiferana, Kootenay 

 Park, B. C, 1943 (Ottawa). 9, reared from Choristoneura fumiferana, 

 Monashee Summit, B. C, Feb. 26, 1945 (Ottawa). 9, Summers 

 Creek near Princeton, B. C, June 1938, J. M. Fraser (Ottawa). 

 cT, 29, reared from overwintering foliage of Abies, Charlo, N. B., 

 April 1955, D. R. Macdonald (Ottawa), tf 1 , Narrows Brook, N. B., 

 July 15, 1955 (MacDonald). d\ 9, Nictau, N. B., June 15, 1955 and 



Figure 67. — Localities for 

 Acropimpla pronexus. 



