AET. 14 ICHNEUMON-FLIES OF GENUS POLYCYBTUS CUSHMAN 41 



appear to be niiontezuina and one female from Cuba that is almost 

 certainly semialhus. Between the Mexican and Cuban specimens 

 there are only very minor differences, which, however, so far as the 

 scanty material goes, appear to be constant, although perhaps not of 

 specific signifiance. 



In the specimens that I am considering montezunia the eyes 

 are a little more distinctly convergent below ; the cheeks in side view 

 a little broader; and the pale markings more strongly tinted with 

 yellow than in semialbus. 



As here identified the two species are very much like niajor 

 Cresson, differing principally as follows : Frons with a more or less 

 well-defined tubercle above base of horn; occipital carina in side 

 view i^arallel with posterior margin of eye, complete to hypostomal 

 carina: temples from above slightly convex; metapleurum and pro- 

 podeum more strongly sculptured, apophyses stouter and straight. 



Propodeum without a transverse black line on carina; media,n 

 black spot on second tergite not emarginate anteriorly but narrowly 

 truncate or rounded; femora ferruginous, at most a little darker 

 above; tibiae not infuscate. 



The specimens of iiionteziima in the National Collection are from 

 the C. F. Baker collection and are labeled simply " Mex." 



The one specimen of semialhus was taken by S. C. Bruner on 

 November 6, 1922, at Santiago de las Vegas, Cuba. 



42. POLYCYRTUS (FOLYCYRTUS) LITURATUS Brulle 



Figure 3 



Mesostenus (Polyoyrtus) lituratus BrttliJ;, Hist. Nat. Ins. Hym., vol. 4, 



1846, p. 208, female, male. 

 Mesostenus lituratus Cbesson, Proc. Ent. Soc. Phila., vol. 4, 1865, p. 28, 



female, male. 



The specimens that I have identified as this species agree perfectly 

 with Brulle's description except that the dark color of the head and 

 thorax is a dark brown or piceous rather than true black. In this 

 respect it is very distinct from the two following species in which 

 the color pattern is very similar. 



Female. — Length 13 mm. 



Vertex in front view flat ; frons with rather deep scrobes and with 

 a high median ridge above base of horn, latter stout conical; eyes 

 weakly convergent below, comprising much less than two-thirds 

 total width of head ; inner and superior orbits minutely alutaceous ; 

 face longitudinally impressed each side of middle, medially coarsely 

 punctate ; occipital carina in side view slightly convergent above with 

 posterior margin of eye, complete and strong to hypostomal carina, 

 latter very high throughout and leaning toward its fellow (fig. 3) ; 



