

J22 HYMENOPTERA OF AMERICA. [PART I. 



men blai kisb ; the first segment rufous, margined with yellow and 

 blackish before the yellow band. Wings brownish, dark along 

 the ens! a. 



I. Clypeus black, terminated by two distant teeth as in the 



other species. 



Mess. a. diff.— This certainly very variable species is quite 

 similar to M. Spinolse 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 campanula] - petiole. 



I hilt. Brazil. 



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

 a species of the rich collection of Spinola. 



15. M. M exicana Sauss. (Fig. 11.) — Obscure ferruginea; alis dilute 

 fuscis; capite et thorace valde punctatis ; clypeo bideutato ; pronoto 

 hand angulato scutellis sulco partitis ; post-scutello carinato-crenulato, 

 flavo; metanoto rugpso, per sulcum vet foveolam hand marginatum 

 diviso; abdomine sericeo; primo segmeuto infundibuliformi, apicem 

 versus Hnea impressa notato; alis infuscatis, cyanescentibus. 9- 



Variat. Omnino ferruginea, alis fuscescentibus. 



Montezumia Mexicana Sauss. Vespides, I, 94, 14 (1852). 

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



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

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

 terminated by two little subcontiguous teeth. Between the 

 antenna 1 is a little carina in form of a T. Thorax lengthened; 

 protborax slightly retracted anteriorly, very finely rimmed, not 

 angulate. Scutellum and post-scutel divided by a longitudinal 

 groove; the post-scutel separated from the scutellum 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 firsl segmenl at the base subsessile, then funnel-shaped, 

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

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

 The abdomen finely punctured beneath its velvety pile. 



