MONTEZUMIA. 117 



Observation. — The specimen described by Spinola has the 

 wings faded, ferruginous. 



Division MONTEZUMIA (propr. diet.). 



Head dilated. Clypeus truncate or bidentate. Metathorax 

 offering two convex cheeks, unarmed, separated by a furrow. 

 Abdomen fusiform; the first segment funnel-shaped, but enlarged 

 above, capable of retracting more or less of the following one. 



In this division the forms are rounder; the first segment is 

 less enlarged above, it docs not present a superior and anterior 

 face; it becomes more funnel-shaped and wider, which gives to 

 these insects the appearance of Polistes with which they have 

 often been confounded. 



1. Abdomen pediculate. The first moiety of the first segment 



Division ALPHA. 

 (Saoss. Vespides, I, 88; III, 160.) 



6. IW. coerulea Saf/ss. 9 • — Valida, nigro-( oeiulea : abdomine coevuleo, 

 clypeo piriformi, punctato, apice subemarginato, subbidentato ; capite 

 et thorace densissime granulato-punctatis, fulvo-birtis ; metanoti 

 sulco striato; pronoto angulato, cristato-marginato ; abdomine fusiformi ; 

 tenuiter deuse-punctato, primo segmento basi petiolato, in primo dimi- 

 dio lineari, dein infundibuliformi, in medio subbidentato, supra suliO 

 profnndo punctiformi canaliculato ; pedibus ferrugiueo-sericeis ; antennis 

 subtus ferrugineis ; alis nigro-cyaneis. Longit, 0.023. 



Variat. clypei margine, tarsorum artioulo ultimo, scutelli fascia, rufis. 



% . Clypeo truncato ; antennis ferrugineis uncinatis. 



Montezumia cocrulea Sauss. Vespides, I, 90, 5 ; pi. xii, fig. 8, 9 (1S52); 



III, 160. 

 M. rubritarsis Sauss. ibid. I, 90, 4. 



M. rufpes Sauss. ibid. I, 89, 3 ; pi. xv, fig. 1, 9 (1852) ; III, 160. 

 Odynerus azurescens Spinol, Mem. Acad. Turin, xiii, 1853, 82, 62, £> . 



llab. Brazil. Para. Rio Janeiro. Guyana. Cayenne. 



T. HI. azureipennis Saoss. — M. ccernlece simillima, at abdomine 

 nigro ; primo segmento sulco parum profundo et utrinqae linea angu- 

 lata flava instructo; alis nigro-cceruleis. 



£ . Clypeo rubro, truncato, subbidentato, antennis uncinatis. 



