156 [June 



spot on the intermediate cox?e beneath, the posterior coxae, their 

 femora except extreme base and apex, and the tips of their tibice, 

 black. Abdomen elongate, stout, bUick ; the first segment, except pe- 

 duncle, apical two-thirds of the second, and the apical half of the two 

 following segments, yellow ; remaining segments black, narrowly mar- 

 gined at tip with obscure yellowish, shining; basal segment bilineated, 

 finely aciculate ; basal foveas of the 2nd segment small ; beneath colored 

 same as above, except that the black bands of the 2nd, 3rd and 4th 

 segments are interrupted on the middle. Length 9 lines; expanse of 

 win"s 15 lines. 



Hah. — Illinois. Dr. Saml. Lewis. 



Closely resembles Ich. /sefus Brulle, but is much larger, the wings 

 longer, and the central area of the metathorax differently shaped ; the 

 colors are arranged pretty much the same, but the apical segments of 

 Isetus are always black. 



I would remark here that Ich. parata Say, Contrib. Macl. Lye. i, 

 p. 68, and Ich. pavdtd Say, Bost. Journ. Nat. Hist. i. p. 228, refer to 

 two separate and distinct species; the former belongs, I think, to Isch- 

 nus. and the latter is a true Ichneumon^ and identical with Ich. Isetus 

 Brulle, — Say having mistaken the two for % and 9 of the same species. 

 I have six specimens of the former species, all males, and fifteen of the 

 latter, also all males. They are widely distinct and answer exactly to 

 the desci'iptions given of them. I have therefore separated the two as 

 follows : — 



Ischnus paratus Say. — Ichneumon parata Say, Contrib. Macl. Lye. i. p 68. 



Ichneumon laetus Brulle. — Ich. parata Say, Bost. Jour. Nat. Hist, i, p. 228. 



33. Ich. fiavizonatus. n. sp. 



Black: face, seutellum, legs, two spots on metatliorax and 5 bands on the 

 abdomen, yellow ; wings subhyaline : central area of metathorax transverse. 



Black ; the face, clypeus, mandibles except base and apex, frontal 

 orbits not reaching the vertex, and the palpi, yellow ; antennae about 

 half the length of the body, porrect, black or brown above, fvilvous 

 beneath, obfuscated at the tips, the basal joint beneath yellow. Thorax 

 densely and finely punctured ; the collar above, tegulfe, a short sutural 

 line before and a short line beneath the wings, yellow; seutellum 

 rather convex, polished, entirely yellow, with a small transverse spot 

 immediately behind it; metathorax densely and rather finely punc- 



