ICHNEUMON-FLIES — GELINAE : MESOSTENINI 281 



infuscate apically; range: Rocky Mountains to Pacific and much of Mexico, 

 also western Texas 13 



13. Hind femur usually infuscate apically; base of third tergite usually black or 



fuscous; bands on wings usually wider 3. calipterus (Say) 



Hind femur entirely ferruginous, or sometimes a little brownish near apex; 

 base of third tergite not black or fuscous; bands on wings narrower . . 14 



14. Front wing about 7.3 to 10.0 mm. long; basal transverse carina of propodeum 



complete or incomplete 4. aridus, new species 



Front wing about 11.5 mm. long; basal transverse carina of propodeum in- 

 complete or indistinct 7. pallens, new species 



FEMALES 



1. Hind femur very stout, about 2.7 to 3.2 as long as deep; second segment of 



fiagellum about 2.0 as long as wide; thorax, coxae, trochanters, and femora 

 with irregular scattered punctures and unusually long hairs. 



14. resolutus (Cresson) 



Hind femur more slender, at least 3.6 as long as deep; second segment of 



fiagellum at least 2.5 as long as wide; thorax, coxae, trochanters, and 



femora more regularly punctate and with shorter hairs 2 



2. Hairs on second tergite very dense, their sockets separated by less than the 



length of the hairs (except sometimes sparser on a small medioapical area). 3 



Hairs on second tergite moderately sparse to very sparse, at least medioap- 



ically, where the hair sockets are separated by much more than the length 



of the hairs 6 



3. Thorax and abdomen entirely bluish black; front wing black with one yellow 



band (fig. 357); metapleurum rather coarsely punctatorugose; occipital 



carina very strong 1. fascilpenms (Brull6) 



Thorax and abdomen mostly ferruginous or fulvous; front wing with two or 

 three yellow areas; metapleurum rather finely punctatorugose; occipital 

 carina moderately strong 4 



4. Mandible strongly narrowed apically, ending in a single tooth (the upper 



tooth) but the lower tooth often present as a weak subapical lobe; head a 

 little wider across temples than across eyes; ovipositor about 4.0 as long 

 from nodus to apex as it is deep at nodus .... 8. buccatus (Cresson) 

 Mandible normal, ending in two teeth of approximately equal size; head nar- 

 rower across temples than across eyes; ovipositor more than 6.0 as long 

 between nodus and apex as it is deep at nodus 5 



5. First nine segments of fiagellum uniformly ferruginous, without a trace of a 



white mark; punctures of mesopleurum a little finer and closer; basal trans- 

 verse carina of propodeum sharp and complete . 2. texensis, new species 

 First nine segments of fiagellum ferruginous to fuscous, segments 6-9 usually 

 more or less whitish above (always marked with whitish when basal flag- 

 ellar segments are ferruginous, usually so marked when they are fuscous) ; 

 basal transverse carina of propodeum usually incomplete. 



3. calipterus (Say) 



6. Ovipositor about 9.3 as long from nodus to apex as it is deep at nodus; ovi- 



positor sheath about 1.35 as long as front wing; fourth tergite with a nar- 

 row fuscous band at base; front wing brown, with lighter brown areas. 



9. tricinctus, new species 

 Ovipositor about 6.5 as long from nodus to apex as it is deep at nodus; ovi- 

 positor sheath 0.5 to 1.1 as long as front wing; fourth tergite not fuscous at 



589900—62 19 



