ICHNEUMON-FLIES GELINAE I MESOSTENINI 71 



6. Front and middle coxae entirely ferruginous 4. ultimus (Cresson) 



Front and middle coxae partly or entirely black or fuscous 7 



7. Segments 2 and 3 of maxillary palpus wliite ... 6. canadensis (Provancher) 

 Segments 2 and 3 of maxillary palpus fuscous 8 



8. Temple strongly convex; punctures on second tergite separated by about 2.5 



their diameter; second tergite mostly or entirely ferruginous. 



2. apicatus (Provancher) 

 Temple weakly convex; punctures on second tergite separated by about 1.0 

 their diameter; second tergite either black or ferruginous. 



5. yukonensis, new species 



FEIMALES 



1. Middle and hind coxae black 2 



Middle and hind coxae ferruginous 4 



2. Tergites 2 and 3 black; wings strongly infuscate; punctures on second tergite 



very dense 1. bituminosus (Cushman) 



Tergites 2 and 3 ferruginous; wings subhyaline; punctures on second tergite 

 very sparse 3 



3. Femora ferruginous 2. apicatus (Provancher) 



Femora fuscous 3. tunicularubra (Fyles) 



4. Apex of lower valve of ovipositor with a well separated basal and apical set of 



teeth, its subapical teeth with both dorsal and ventral cusps (fig. 308,a) 



9. polyphemi Townes 

 Apex of lower valve of ovipositor with a continuous single set of teeth, its sub- 

 apical teeth without ventral cusps (figs. 327, k-o) 5 



5. Front coxa entirely ferruginous; fourth tergite usually ferruginous or mostly 



so 4. ultimus (Cresson) 



Front coxa largely or entirely fuscous; fourth tergite largely or entirely 

 black 6 



6. Apical margin of tergite 6 white; hind basitarsus entirely whitish or rarely 



with a weak subbasal infuscation 7. nuncius (Say) 



Apical margin of tergite 6 not white; hind basitarsus mostly or entirely 

 fuscous 7 



7. Ovipositor sheath about 0.87 as long as front wing; segments 2-4 of hind tarsus 



whitish or mostly so 8. extrematis (Cresson) 



Ovipositor sheath about 0.47 as long as front wing; segments 2-4 of hind tarsus 

 fuscous 8 



8. Tip of upper valve of ovipositor thick, its upper margin weakly scalloped (fig. 



327,1) ; wrinkling on mesopleurum coarser ... 5. yukonensis, new species 

 Tip of upper valve of ovipositor more slender, its upper margin simple oi 

 faintly scalloped (fig 327,m) ; wrinkling on mesopleurum finer. 



6. canadensis (Provancher) 



1. Gambrus bituminosus (Cushman) 



Figure 327,i 



Cryptoideus bituminosus Cushman, 1924, Proc. U.S. Nat. Mus., vol. 64, art. 4, 

 p. 6; 9. Type: 9, Flushing, N.Y. (Washington). 



Front wing 6.6 to 8.5 mm. long in male, 7.5 to 10.5 mm. long in fe- 

 male; clypeus rather short, moderately convex, with a very weak, 

 blunt, median, apical tooth but the tooth appearing to be rather 



