122 HYMENOPTERA 05 AMERICA. [PART I. 



men blackish ; the first segment rufous, margined with yellow and 

 blackish before the yellow band. Wings brownish, dark along 

 the ct S 



% . Clvpeus black, terminated bj two distant teeth as in the 

 other species. 



is. ft. diff. — This certainly very variable species is quite 

 similar to M. Spinolae in its size and livery, but the thorax is not 

 so slender, the head is more inflated, the 1st segment more flat- 

 tened. It has nearly the fades of a Pachymenes because of the 

 exceptionally depressed form of this segment, which forms nearly 

 a campanular petiole. 



Hah. Brazil. 



I have described the specimen in the Turin museum; it is also 

 a species of the rich collection of Spinola. 



15. 81. >Iexicana Sauss. (Fig. 11.) — Obscure ferruginea ; alis dilute 

 fuscis ; capite et thorace valde pnnctatis ; clvpeo bidentato ; pronoto 

 baud angulato scutellis sulco partitis : post-scatello cririnato-crenulato, 

 flavo; irietanoto rugoso, per solemn vel foveolam baud roargiuataui 

 diviso; abdouiine sericeo; prirno segmeuto infundibulifonni, apieem 

 versus linea impressa notato ; alis infuscatis, cyanescentibus. J. 



Yariat. Ouinino ferruginea, aiis faseesceutibus. 



Mantezumia Mexieana SArss. Tespides, I, 94. 14 (1S52). 

 Total leugtb, 20 mm. ; wing. 15 mm. 



9 . Insect slender. Head and thorax densely cribrose, sha- 

 greened, rugose. Clvpeus pyriform, convex, strongly punctured, 

 terminated by two little subcontiguous teeth. Between the 

 antenna? is a little carina in form of a T. Thorax lengthened ; 

 prothorax slightly retracted anteriorly, very finely rimmed, not 

 angulate. Scuteilum and post-scutel divided by a longitudinal 

 groove: the post-scutel separated from the scuteilum by a deep 

 furrow and forming a ridge, transverse, crenulate. divided by the 

 medial groove. Metathorax offering two convex cheeks much 

 more rugose than the remainder of the thorax, divided by a striate 

 fossette. which has no distinct margin ; the lateral ridges effaced 

 by the rugosities. Abdomen smooth, shining, sericeous, or vel- 

 vety : the first segment at the base subsessile. then funnel-shaped, 

 convex, having a lengthened depression above : the second seg- 

 ment moderately larger than the first, its border a little upturned. 

 The abdomen finely punctured beneath its velvety pile. 



