MONTEZUMIA. 121 



B. Head strongly dilated on the vertex behind the eyes, having 

 (so to speak) an anomalous form. TJiorax much lengthened; 

 abdomen often large. The first segment depressed or flat- 

 tened above and divided by a very distinet groove. 



22. M. JBrasiflieiBsis Sauss. %. — Prsecedentium statuise vel paulo 

 major ; occipite maxime producto, thorace eodemmodo elongato, sed 

 antice magis rotundatoet metanoto paulo latiore, trnncatiore, foveolato ; 

 abdomine latiore, segmentis, 1°, 20, depresses; primo lato, sulco pio- 

 fundo diviso. Iusecti color otmiino eastaneus ; metanoto, lateribus et 

 antennarutn flagello, nigris. Alis fusxo-cyaneis, stigniate ferrngineo. 

 Longit, 19 mm. 



Variat: Pedibus flavo-variis ; abdominis primo segmento flavo-marginato ; 



corpore plus minusve ferrugineo. 

 % . Antennis apice uncino parvulo fulvo instructis ; clypeo ferrugineo 



apice emarginato, valde bidentato. 



Moniezumia Brasiliensis Sauss. Vespides, III, 164, 56 (1854). 



Hab. Brazil. Province of the mines. (Typus in museo Pari- 

 siensi.) 



23. M. macrocepliala Sauss. 



Montezumia macrocepliala Sauss. Vespides, III, 165, l 57; pi. iv, fig. 3, £ 

 (1854). 



Abdomine maxime dilatato. 



Iii this species the male has the abdomen squat or flattened, 

 strongly dilated and depressed; its first segment is parted by a 

 strong groove, sometimes continued on the 2d segment. In the 

 female the abdomen is not so flattened down but is slender and of 

 the normal form. The clypeus ? is terminated by two small, 

 rather distant teeth. 



Var. Often the clypeus 9, the face, tarsi, and margins of tin 4 

 abdominal segments become yellowish. On the contrary, the 

 whole insect often becomes uniformly ferruginous. 



Hab. Brazil. (The type in the Paris museum.) 



Division PARAZUMIA. 

 (Sauss. Vespides, III, 166.) 



Head much dilated behind the eves; (borax wide and strongly 

 depressed; nietathorax prolonged" behind obliquely; it s lateral 



- Errata. — 10th line of the description, instead o( u dessoua dn and mm 

 re;ul: "dessux des antennes," 



