124 



U. S. NATIONAL MUSEUM BULLETIN 216 



This species is transcontinental in the Canadian zone and it occurs 

 also in northern Europe. Most specimens have been collected in 



spring. 



11. Triclistus pallipes Holmgren 



Figures 186,h; 187,j 



Triclistus pallipes Holmgren, 1873, Ofvers. Svenska Vetensk. Akad. Forh., 

 vol. 30, p. 59; ?. Types: 9 9, "Wermelandia et Norvegia" (Stockholm). 



Exochus pygmaeus Cresson, 1864, Proe. Ent. Soc. Philadelphia, vol. 3, p. 

 285; "c?" 1 ^ 9 (new synonymy). Type: 9, Illinois (Philadelphia). 



Front wing 3.4 to 5.6 mm. long; face rather strongly mat, its punc- 

 tures small, their interspaces about 0.8 then diameters; temple of male 

 moderately convex, its hairs moderately dense, evenly spaced ; temple 

 of female almost flat and above not bulging as in T. podagricus, its 

 hairs numerous next to eye and occipital carina, elsewhere sparse and 

 irregularly spaced, absent in median areas; metapleurum of male with 

 1 to 15 hairs, of female with to 3 hairs; median longitudinal carinae 

 of propodeum sharp but not particularly strong, divergent at position 

 of costula (which is absent), convergent subbasally; hairs on area of 

 second lateral area of propodeum sparse ; median apical area of propo- 

 deum about 0.50 as long as wide; hind spur of hind tibia about 3.0 

 as long as wide; second segment of hind tarsus about 3.1 as long as 

 wide in male, about 2.7 as long as wide in female; first tergite unusually 

 convex, about 1.5 as long as wide in male, about 1.6 as long as wide in 

 female, its dorsal carinae extending about 0.50 its length; tergites of 

 male medially bare on the basal 4 tergites, laterally with rather long 

 hairs, the hairs progressively more numerous toward apical tergites, 

 beyond fourth or fifth tergite without median hairless area; tergites 

 of female bare, laterally with scattered short hairs which are progres- 

 sively more numerous towards apex of abdomen, and often with a 

 very few discal hairs; apical notch of female subgenital plate about 

 0.4 as deep as wide. 



Figure 79. — Localities for 

 Triclistus pallipes. 



