HYMENOl'TERA ICHNRUMONIIXE. t'.u-.i 



UTIIoTolM'S gen. nov. (A/flo-r, ropo?). 



This genus of Ichueumonidae is undoubtedly allied to Kxyston, but 

 differs from it, as it does from all members of the familv known to me, bv 



- 



the separation of the first, from the second cubital cell liv a weak nervure, 

 not shown in the plate, which extends entirely across the space usually left 

 open in this family, though almost always closed in the Braconida-. It is 

 also remarkable for the flaring of the apical cubital cell. The antenna- are 

 shorter than the hodv and the abdomen has the basal joint comparatively 

 stout, considerably enlarging, and the subapical joints mure than twice as 

 broad as long. 



1,1 I MoToKTS CKESSONI. 

 I'l. in. KJ-. L'l. 



The single specimen is preserved on a side view in which all the parts 

 but the legs are preserved, but the wings are somewhat obscured by over- 

 lapping. Apparently, the areola is not closed externally, and the outer 

 cubital cell is opened unusually wide, while the radial cell is exceptionally 

 deep for its length ; the parts below the areola are obscure. The antenna- 

 are moderately stout, reaching to the middle of the abdomen, the joints 

 scarcely moniliform, twice as long as broad. The thorax is compact oval. 

 The abdomen beyond the basal joint is as long as the head and thorax 

 together ; the basal joint is more than twice as broad apically as at the base 

 and less than twice its greatest breadth. The whole body, but especially 

 the thorax, is dark colored. 



Length of body, 4""": of antenna', ;{"""; of wing, :')'"" 



Green River, Wyoming. One specimen, No. 131 (l>r. A S. Packard). 



K1IVSSA (iravenhorst. 



K'HYSSA .MVKMS. 



n. HI. \-i.>. MI. 



Although -mailer i!i. in aiiv speeies I have noted, and much smaller 

 than imi known to me, I can find no characters in this single specimen 

 which do not occur in Uli\>-a, except in the relative proportions of the tho- 

 rax and abdomen. The -|M-ciineii is preserved on a side view and in a 



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