ICHNEUMON-FLIES — GELINAE : MESOSTENINI 



447 



This species occurs throiiglioiit the United States and adjacent parts 

 of Canada and Mexico. 



6. Mesostenus clitellatus, new species 



Front wing 5.0 to 8.5 mm. long; clypeus small, strongly convex, 

 its apical margin straight; temple moderately convex; prepectal carina 

 ending dorsallj^ near upper 0.4 of hind margin of pronotum, its upper 

 part not so sharp as the rest and forming the hind margin of a white 

 spot; punctures on mesopleurum moderately coarse and strong, those 

 near middle of mesopleurum crowded and irregular, their margins 

 tending into longitudinal ^VTinkling; apical propodeal carina of male 

 sharp, complete or sometimes with a narrow median interruption, 

 sublaterally elevated as a weak crest; apical propodeal carina of female 

 rather broadly interrupted medially, its lateral section rather strongly 

 oblique, sublaterally wealdy elevated to form a weak crest; areolet 

 about 1.6 as wide as high; second tergite of female weakly mat, its 

 punctures of moderate size, separated b}^ about 0.8 their diameter; 

 ovipositor sheath about 0.73 as long as front wing; ovipositor tip about 

 6.3 as long from nodus to apex as it is deep at nodus. 



Coloration of both sexes shnilar to that of corresponding sex of M. 

 thoracicus except that postscutellum and apex of scutellum are always 

 black, and that propodeum basad of its basal carina averages more 

 extensively black. Usually the basal area of the propodeum has a 

 broad transverse black mark which is a little constricted on the mid- 

 line, so that it has some resemblance to a pair of pack saddles. This 

 is the origin of the specific epithet "clitellatus." 



Type: 9, Moorestowai, N.J., July 20, 1939, H. and AI. Townes 

 (Washington, USNM 63828). 



Paratypes {54: d', 589) : From Arkansas (Bentonville) ; British 

 Columbia (Robson) ; Connecticut (South Meriden) ; Illinois (Florence) ; 

 Iowa (Ankeny and Jefferson Co.); Kansas (Baldwin, Johnson Co., 



Figure 248. — Localities for 

 Mesostenus clitellatus. 



