ICHNEUMON-FLIES — GELINAE : MESOSTENINI 79 



mens state that the parasite cocoon was spun outside the pupal shell of 

 the host. 



In our own collecting we find the species among low herbage and 

 grass along roadsides, edges of woods, and overgrown fields. Its 

 occurrence in this habitat explains why it is so often reared in studies 

 on economic insects. 



This species occurs over most of the United States and southern 

 Canada. It is more common in the East than in the West. 



5. Ganibrus yukonensis, new species 



Figure 327,1 



Front wing 4.0 to 7.4 mm. long; general structure as in G. ultimus 

 except that clypeus is a little more convex, sculpture more strongly 

 mat, wrinlding on mesopleurum stronger, coarser, and more reticulate, 

 punctures on second tergite of male a little stronger and closer, sec- 

 ond tergite of female mat all over and with more evenly distributed, 

 medium-sized, moderately strong punctures that are separated by 

 about 1.5 their diameter, and especially that the tip of upper valve of 

 ovipositor is thicker and has a distmctly scalloped upper margin 

 (fig. 327,1). 



Male: Black. Palpi fuscous; tegula black; front and middle 

 legs beyond trochanters ferruginous, their tarsi somewhat infuscate 

 and often the front femur infuscate basally; hind second trochanter 

 and femur ferruginous, the apical 0.2 ± of the femur black; hind 

 tibia brown, fuscous apically; hind tarsus fuscous brown, the first 

 three segments pale at base; wings faintly infuscate; abdomen black 

 with apical margin of tergites 2 and 3 ferruginous, or tergites 2-4 

 and apex of first tergite more or less ferruginous. 



Female: Black, including the palpi, flagellum and tegula. Front 

 and middle legs ferrugmous, some or all of front coxa, usually more 

 or less of front trochanters, and sometimes base of front femur, fus- 

 cous, their tarsi more or less mfuscate and their tibiae often tinged 

 with fuscous; hind coxa, trochanters, and femur ferruginous, the 

 apical 0.15 to 0.3 of the femur fuscous; hind tibia fuscous, tinged with 

 reddish brown; hind tarsus fuscous, paler at the joints; abdomen 

 black with apical margin of tergite 2 ferrugmous, or the second, tMrd, 

 and apical 0.4 ± of first tergite partly or entirely ferruginous. 



Type: 9, Rampart House, Yukon, July 31, 1951, J. E. H. Martin 

 (Ottawa) . 



Paratypes: d", Big Delta, Alaska, July 3, 1951, W. R. M. Mason 

 (Ottawa). 5c?, 49, Norman Wells, N. W. T., June 21, 22, 27, 29, 

 1949, and July 3, 4, 9, 21, 1949, W. R. M. Mason (Ottawa). 9, 

 Remdeer Depot, Mackenzie Delta, N. W. T., July 6, 1948, W. J. 

 Brown (Ottawa). 3cf, Rampart House, Yukon, June 17, 1951, and 

 July 19 and 27, 1951, J. E. H. Martin (Ottawa). 



