ICHNEUMON-FLIES — GELINAE : MESOSTENINI 



243 



tarsi darkened apically; segments 3 and 4 and sometimes more of 

 hind tarsus, whitish; wings weakly infuscate; abdomen red, the 

 clasper fuscous. 



Female: Black. Orbit narrowly whitish in front, behind, and on 

 vertex; apical part of front and middle femora and front and middle 

 tibiae in front, broAvnish, the legs otherwise fuscous or black; wings 

 moderately infuscate ; abdomen red, its first segment partly infuscate 

 basally. 



This species was introduced into South Africa to control Loxostege 

 jrustralis, an important pest of a native pasture plant. The success 

 of the introduction is not reported upon, but as an incident to the 

 work Ullj'^ett described the biology of the parasite in the two papers 

 cited above. The host was Loxostege sticticalis in sug&r beet fields in 

 southern Alberta. The Loxostege makes its cocoon just below the 

 soil surface. The parasite is particularly in evidence at the end of 

 the second generation of Loxostege on the beet crop, attacking the 

 overwintering prepupae in the soil dm-ing the mild, sunny weather of 

 fall months. 



Specimens: cf , 9 (paratypes of inornatus), sweeping alfalfa. Fort 

 Collins, Colo., May 9, 1894, C. F. Baker (Washington). 5cf, reared 

 from Loxostege sticticalis, "Belleville, Ont.," F. J. Simonds (Washington 

 and Townes). 9, reared from Loxostege sticticalis, Montana, October 

 1941, F. J. Simonds (Washington). 



This species ranges from southern Alberta to northern Colorado. 

 It is a parasite of Loxostege. 



33. Trachysphyrus krombeini, new species 



' Male: Unknown, probably similar to male of 2\ albitarsis albitarsis. 



Female: Front wing 5.5 to 6.8 mm. long; similar in structure to 



female of T. albitarsis except that wrinkling on frons is a little weaker 



Figures 125-128. — Localities: 125 (left), Trachysphyrus scapulatus; 126 (center, left), T- 

 areolatus; 127 (center, right), T. latigenalis ; 128 (right), T. krombeini. 



