232 HYMENOPTEKA OF AMERICA. [PART I. 



vissimo; autennarum flagello subtus et scapo apice, ferrugineis ; tegulis 

 testaceo-uiaculatis ; abd. segmentorum 2-5 margine late flavo. et valde 

 punctato; primo nonnunquam etiani tenuiter flavo-marginato; tibiis an- 

 tice flavo vel fulvo-variis; alis ferrugineis, apice griaeis. — Longit. 10 mm. 



Variat. Metanoti canthis flavis. 



J. Clypeo punctato apice, dentibus 2 acutis, inter se distantibus armato ; 

 punctia 2 fulvis in dentibus et 2 in augulis superioribus ornato. 



% . Clypeo in marginibus argentato ; apice fere ut in $ bidentato, vel 

 emarginato, dentibus 2 trigonalibus terminato; apice lineis 2. in summo 

 fasciis 2 lateralibus. flavis : labro flavo; uiandibularum margine externo 

 et scapo. linea flava instructis. 



Variat. Clypeo in lateribus flavo-marginato ; oculis iutus flavo-inarginatis, 

 pedibus nigris. 



Odynerus brevithorax Sauss. Vespides, I, 172, 62 1 (1852) ; III. 231.— 

 Rev. Zool. X, 1858, 166. 



The teeth of the clypens 9 are spiniform and separated by an 

 arched margin, not angularly notched. The thorax is cubical, 

 not longer than wide; the disk of metathorax is much broader 

 than long, in the form of a half circle ; its margins are arcuated 

 anteriorly, not sinuated. The scutel is square, rather elevated. 

 and the post-scutel is situated a little lower, while in auratua, 

 the scutel is more flattened aud the post-scutel is on the same 

 plane. 



fit'ts. a. diff. — Compare 0. nasidens and simjrficoj'nis. 0. 

 diabolicus, and also Ancistrocerus Aristae and Paredesi. — This 

 species, as well as the following, must be carefully distinguished 

 from different species of Neotarinia;* this inay easily be done, 

 from their very wide first abdominal segment, not very small and 

 shortly petiolate : from their distinct post-scutel, and the truncate, 

 not angulate, apex of the clypeus. 



Hob. South America. Brazil. Bahia, 2 9,3 %. — Vene- 

 zuela 9 V 



67. O. liasideilS Late. — 0. brevithoraci simillimus ; statura varia- 

 bili ; tborace longiore quam latiore ; pronoti margine postico, post- 

 scutello. abdoniinisque segmentorum 2-tJ margine ocbraceis ; alis ferru- 

 giueis, apice griseis. 



9- Clypeo apk-e latius bidentato, magis biangulato; dentibus fulvis; 

 interdum superne maciilis 2 fulvis vel oinnino flavis. 



1 Tbe figure which bears the same name belongs to the 0. nasidens. 

 * Social wasp. 





