ICPINEUMON-FLIES — GELINAE : MESOSTENINI 443 



Niagara Falls, N.Y.; August 18 at Winslow, Maine; and August 27 

 at La Trappe, Que. 



This species occurs in the Alleghanian fauna. 



4. Mesostenus melanurus Cushman ^ 



Mesoslenus melanurus Cushman, 1929, Proc. U.S. Nat. Mus., vol. 74, art. 16, p. 

 47; 9. Type: 9 , Calgary, Alta. (Washington). 



Male: Unknown. 



Female: Front wing 5.5 mm. long; body build exceptionally stout; 

 clypeus very convex, in profile forming a low, rounded pyramid; 

 apical edge of clypeus strongl}^ arcuate; thorax very short and stout; 

 temple strongly convex, the head 0.90 as wide across midlength of 

 temple as across widest point of eyes; prepectal carina ending dorsad 

 at middle of hmd edge of pronotum; punctures on mesopleurum rather 

 coarse, near center of mesopleurum obscured by fine rugulosity; apical 

 carina of propodeum very strong, extending forward to near basal 

 carina, not produced sublaterally as a crest, its median 0.2 weak; areolet 

 1.65 as wide as high; second tergite subpolished, with fine, weak punc- 

 tures that are separated by about 4 tunes their diameter; ovipositor 

 sheath 0.57 as long as front wing; ovipositor 5.5 as long from nodus 

 to apex as it is deep at nodus. 



Black. Knees brown; tibiae and tarsi brown, the hind ones fuscous 

 brown; wings hyaline; apical 0.4 of first abdommal segment and aU of 

 second and third segments dark ferruginous. 



Redescribed from the type, a female labeled: Calgary, Alberta, 

 May 12, 1923, G. Salt (Washington). 



5. Mesostenus gracilis Cresson 



Mesostenus gracilis Cresson, 1864, Proc. Ent. Soc. Philadelphia, vol. 3, p. 315; 



c?. Type: cf, Virginia (Philadelphia). 

 Nematopodius orbitalis Ashmead, 1890, Bull. Colorado Biol. Assoc, vol. 1, p. 21; 



9. Type: 9 , Westcliflfe, Colo. (Washington). 



Front wing 3.6 to 6.7 mm. long; clypeus small, strongly convex, its 

 apical margin weakly arcuate; temple short, moderately convex; 

 prepectal carina sharp dorsad to about upper 0.4 of hind margin of 

 pronotum; punctures on mesopleurum moderately coarse, strong, 

 separated by about 0.3 their diameter in male, a little closer in female; 

 apical propodeal carina of male complete or with a narrow median 

 interruption; apical propodeal carina of female broadly interrupted 

 medially, its lateral section strongly oblique, sublaterally weakly 

 elevated to form a weak crest; areolet about 1.6 as wide as high; 

 second tergite of female moderately mat to subpolished, its punctures 

 rather small and weak, separated by about 1.5 their diameter; ovi- 

 positor sheath about 0.7 as long as front wing; ovipositor tip about 7.0 

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



