38 HYMENOPTERA OF AMERICA. [PART I. 



spinipes; the 2d segment without any impression before its 

 border; scutel black; no macula under the wing-. The interme- 

 diate femora have no yellow fasciae. The wings are washed with 

 brown, with a golden reflection; the 2d cubital ceil generally 

 triangular; its radial side wanting or quite short. 



Clypeus and head gray-silky; abdomen golden-silky as in 

 Z. aztecus. 



Bab. Mexico ; the Oriental Cordillera. Orizaba. (G % 

 sent by Mr. Sumichrast.) 



It is not without hesitation that I separate this species from Z. 

 aztecus ; but the clypeus is decidedly of a different form, and the 

 coloration is quite the same in my six specimens, seeming to in- 

 dicate a decided species. The end of the antennas is quite black 

 as in Aztecus. 



24. Z. Clirysopterits Sauss. — Niger, ferrugineo-hirtus, statura? Z. 

 Wcstwoodi ; capite latiore quain longiore, dense— punctato. Thorax 



valde pnnctatus, reticulato-i u^osus ; pronoti rnargine cristato, angiitis 

 proininentibus ; scutello sulco partite ; metanoto lsevi, hirsuto, postice 

 foveola distincta, carinis longitudinalibns 2 marginata instructo. Petio- 

 lus ovato-cylindricus. inflatus, parte lineari basali brevissima ; secun- 

 dum segmentumgloboso-dilatatum. vi\ pedunculatum, fulvo-velatinuni. 

 Puncta 2 frontis et pronoti angulorum abdominisque segmentorum 

 limbus auguste tiava ; tarsi lerruginei ; alse subferruginese, tegulis pieeis 

 vel flavo-raarginatis. Longit. 0.017. 

 % . Clypeo punctato, dimidio iuferiore aurantiaco. rnargine tenniter nigro, 

 bidentato. 



Zetlius chrijsopterus Sauss. Vespides, I, 13, 8, pi. viii, fig. 7, £,1852; 

 Revue Zool. X, 1858, 66. 



Hah. Probably from South America. (Typus in auctoris 

 museo.) 



25. Z. ferrugineus Sauss. 



Zethus ferrugineus Sauss. Vespides, I, 14, 10, 1S52. 



Bab. South America. Para. 



26. Z. cinerescens Sauss. 9« — Niger, cinereo-sericeus ; cljpeo 

 piano, pnnctato-striato, bidentato ; capite dense punctato; tborace cri- 

 brato, striato-mgoso, antice cristato, angulato; post-scutello truncato; 

 metanoto postice producto. rugoso, lateraliter cristato-car'mato : in medio 

 foveolato sed hand bicarinato ; petiolo breri, globoso-clavato, haud 

 cribrato; abdom. secundo segmento subsessili, sed piriforme-dilatato 

 (haud globoso), sericeo. — Puncta 2 frontis, pronoti margo, post-scutelluin 



>eo 



ri- 



