224 HYMEXOPTERA OF AMERICA. [PART I. 



auteunis apice subcocbleatis ancino arcu&to, obtnso, ccmpresso, rufo, vel 

 nigro-vario. 



Odynerus humeralis Halidat, Trans. Linn. Soc. XVII, 324 (1S37). — 



Sai;ss. Vespides, III. 22* 

 Odyn. cliilcnsis Lep. St. Fakg. Hymen. II. G43. 25 (1541).— Spinola in 



Gay's Hist, fis. de Chile. Zool. VI. 255. 1.— Sacss. Vespides, I, 166, 



54. pi. xvii. fig. 6 ; III, 225. 



This large species has some very salient lateral ridges upon 

 the metathorax ; the superior ridges of the concavity are saliently 

 indicated, especially among the males, but the rugosities which 

 cover the metathorax as well as the remainder of the thorax 

 render them obtuse and indistinct. The antenna? % terminate in 

 a blunt rufous hook or in a longitudinal spiral ; the clypeus % is 

 terminated by two rather long spines, and in the male the tarsi 

 are mostly blackish. It is. however, closely allied to 0. tuber- 

 culatum. Comp. this species. 



Hab. Chili, and the western coast of South America. 



5t. O. TaraTmcensis Sauss. — Validus; 0. humeral i siinilis ; niger; 

 pronoti inargine antico et abdominis fasciis duabus, luteis ; antennis 

 nigris, scapo rufo ; tegulis nigris ; mandibulis et pedibus, runs ; alis 

 ferrugineis, apice violascentibus. — J ?. 



£ . Clypeo luteo, apice dentibus 2 distantibus armato. 



Odynerus Tarabucensis Sacss. Vespides, III, 250, 125, % (1S54). 



Hab. Bolivia (I do not possess this species. Type in the Mus. 

 of Paris). 



b. Wings fuscous, icith violet iridescence. 



5S. O. al/bocinctus Pdis. — Niger, vrlutinus, nigro-hirsutns. Clypeo 

 piriformi nigro, apice valde bidentato; antennis, mandibulis et labro, 

 rufis ; metatborace rotundato ; abdomine pilis nigris longis sparso, 

 tantum primo segmento auguste albido-limbato ; secuudo segmento 

 snbtus baud tuberculato : pedibus rufis. femoribus postice nigris ; alis 

 fuscescentibus, violascentibus praecipue apice ; tegulis nigris. J . Long. 

 20 mm. 



Odynerus albocinctus Pols a. Strobel, Atti della Soc. Italiana de Sc. Nat. 

 * XI. 1868, 256, 9. 



Hab. The Argentine Republic. Province of Mendoza. 

 This is the only species of the type Hypodr/nerus found as yet 

 on the Oriental side of the Andes. 



The form not having been described. I cannot assign to this 



