118 HYMENOPTERA OF AMERICA. [l'ART I. 



Variat ore, tarsis apice, scutellorum fasciis, rnfis. 



Monti zumia azureipennis Sauss. Vespides, I, 89, 2 (1S52) ; III, ICO. 



Montt zumia ru/identata Sauss. Vespides, I, 88, 1 (1852). 



• 



This insect is most likely a mere variety of M. ccerulea. 

 llali. Brazil. Mexico. 



In this section one might nearly place also 31. Ghilianii, and M. 

 azteca. (See below, Xo. 1G and 18.) 



2. First segment of the abdomen subsessile. 



Division BETA. 

 (Safss. Vespides, I, 90; III, 162.) 



A. TJiorax moderately lengthened, first abdominal segment 

 funnel-shaped, convex, divided by a feeble groove, vertex 

 somewhat swollen. 



a. Wings transparent or ferruginous. 



§. ]M. nigriceps Spin. — Niger; abdominis 1° segmento infundibuli- 

 formi, brevissime petiolato, latitudine | secundi ; maudibulis ferrugineis ; 

 thorace et pedibus rulis; illo paulo nigro-vario; post-sentello flavo- 

 binotato; abdominis primo segmento basi rufo, auguste fiavo-liuibato ; 

 alis hyalinis, venis testaeeis. 



% . Clypeo polygonale, albido, margine antico truncato, integro ; autennis 

 apice uncino obtuso testaceo instructis. Long. 5-L! lin. 



Eumenes? nigriceps Spinola, Ins. rec. a Cayenne par Leprieur, Ann. Ent. 



Fr. X, 1841, 128, 79, % . 

 Montezumia nigriceps Sacss. Vespides, III, 102, 51. 



/luh. Cayenne. 



9. I»I. iiifuiidiluiliformis Fahk.— Gracilis, clypeo pin'formi, trun- 

 cato, puDctato-striato ; corpore punctato ; pronoto marginato, angulato ; 

 mesonoto nitido, sparse punctato; metanoto dense punctato, velutino, 

 hirto, in medio tantum canaliculate; capite, thorace et pedibus nigris, 

 tomento anreo rariore sericeis ; abdomine ferrugineo, vel badio : primo 

 segmento infundibnliformi, fasciis 2 nigris et utrinque dente laterali 

 instructo; segmentis 3-5 punctatis; tarsis apice rnfis; mandibulis 

 ferrugineo-variis ; antennis subtus obscure ferrugineis ; alis hyalinis, 

 venis nigris. 



Var. Segmentis 1°, 2° limbo ilavescente; tarsis et tibiis fuscescentibus. 

 Longit, 18 mm. 



