224 U. S. NATIONAL MUSEUM BULLETIN 216 



We found this species common along stream sides at around 5,500 

 ft. altitude in the mountains of Arizona, usually in the coolest, 

 dampest habitats and usually resting on the under side of foliage 

 just above the streams. A species of Pisaurina was common in this 

 habitat and may have been the host. 



2. Genus Schizopyga 



Figure 293, a 



Schizopyga Gravenhorst, 1829, Ichneumonologia europaea, vol. 3, p. 125. Type: 

 Schizopyga podagrica Gravenhorst; monobasic. 



Front wing 3.4 to 6.5 mm. long; eye with long conspicuous hairs; 

 clypeus in same contour as face, not at all separated, the combined 

 face and clypeus strongly convex transversely, weakly convex longi- 

 tudinally; mandible very narrow at apex, its lower tooth internal in 

 position and expanded into a wide flat blade; apex of maxilla very 

 large (these specializations of the mandible and maxilla occur in no 

 other genus of the tribe); temple long, rather flat; epomia weak but 

 placed on a conspicuous angle; mesoscutum subpolished, with moder- 

 ately dense, evenly distributed hairs ; notaulus long but not very strong ; 

 prepectal carina complete, its upper end near front margin of mesopleu- 

 rum ; pleural carina of propodeum complete ; legs rather stout ; areolet 

 absent; intercubitus about as long as second abscissa of cubitus; 

 nervulus postfurcal by about 0.25 its length; discoidella strong; 

 first tergite moderately stout; second to fourth tergites with weak 

 sublateral swellings and a weak postmedian transverse impression, 

 mat, with moderately dense hairs all over, their punctures small and 

 weak; ovipositor sheath about 0.67 as long as apical depth of abdomen ; 

 ovipositor stout, upcurved, tapered from base to a sharp point (fig. 

 332,d). 



This genus is Holarctic. There are two Nearctic species, one or 

 both of which occur also in Europe. The biology of a European 

 species has been reported on by Nielsen (1935. Entomologiske 

 Meddelelser, vol. 19; pp. 194-206). He found that the host is 

 Cheiracanthium carnifex, a spider that lives in nests. The adult 

 female enters the nest by biting a hole in the silk (which may explain 

 the peculiar mandibles of this genus). Its egg is laid on the cephalo- 

 thorax of the host, near the apex. 



Key to the Nearctic species of Schizopyga 



1. Hind tibia white, with broad apical and subbasal blackish bands (fig. 323, b) ; 

 abdomen entirely black; propodeum subpolished ... 1. frigida Cresson 

 Hind tibia fulvous, with a broad apical but no subbasal blackish band (fig. 

 323,c); abdomen usually partly fulvous; propodeum mostly mat. 



2. pulchra Walley 



