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U. S. NATIONAL MUSEUM BULLETIN 216 



PART 3 



3.3 as long as wide; apical carina of propodeuni with its median third 

 usually absent but sometimes present and weak; second tergite mat, 

 with rather small punctures that are separated by about their di- 

 ameter; ovipositor sheath about 0.5 as long as front wing; teeth on 

 apex of ovipositor spaced as normal for the genus, not unusually 

 close. 



There are eastern and western subspecies, distinguished on color 

 as described below: 



1. Abdomen and hind femur ferruginous or mostly so; range: Rocky Mountains. 



3a. bicolor bicolor (Cushman) 

 Abdomen and hind femur entirely black; range: Quebec to Manitoba. 



3b. bicolor maurus, new subspecies 



3a. Xylophrurus bicolor bicolor (Cusbman) 



Cryptoideus bicolor Cushman, 1919, Proc. U.S. Nat. Mus., vol. 55, p. 537; 9 . 

 Type: 9, Colorado (Washington). 



Black. Narrow hind and frontal orbits, most of clypeus, a stain 

 on mandible, legs beyond trochanters, and abdomen ferruginous, the 

 legs often infuscate apically, the front legs beyond trochanters some- 

 times largely infuscate, the middle legs beyond trochanters sometimes 

 partly infuscate; base of first abdominal segment more or less infuscate 

 and apical tergites often more or less infuscate; flagellum of female 

 with a white band occupying about 3 segments (but brownish beneath), 

 sometimes with its basal segments more or less fulvous; wings varying 

 from uniformly infused with brown to pale brownish or subhyaline 

 with a broad brownish band just before areolet and apex brownish; 

 ovipositor sheath black, its apex usually fulvous. 



Specimens: cf , 29, Calgary, Alta., May 24, 1923, G. Salt (Wash- 

 ington and Townes). 9, Ohver, B.C., May 23, 1923, C. B. Garrett 



Figures 269, 270. — Localities: 269 (left), Xylophrurus bicolor bicolor; 270 (right), 



X. b. maurus. 



