MONTEZUMIA. 123 



Insect ferruginous. The thorax often varied with black in the 

 sutures and upon the mcsothorax. Antennae ferruginous, with 

 the flagellum blackish above, beyond the third article ; post-scutel 

 orange ; (probably often also the wing scale, the posterior border 

 of the prothorax aud that of the first two abdominal segments 

 sometimes of the same color ; the yellow border of the first seg- 

 ment, when it exists, is often interrupted.) Legs ferruginous; 

 wings brown, slightly darkened, with violet and golden reflections. 



Var. The thorax is sometimes less lengthened than in the type. 



Bess. a. diff. — I think this species nearly related to 31. ferru- 

 ginea Sauss., which does not appear to have violet wings. It is 

 near to Mexicana, but the abdomen of this last is a little pedi- 

 culate and the head more swollen. It is also closely related to 

 31. Sjnnolse, but it differs from it by its thorax without angles, 

 with little margin, by its metathorax slightly attenuate, less 

 truncate vertically, less excavated, more rounded, less quadrate. 

 It is very similar also to 31. inf emails Sp., with which I cannot 

 compare it, the sexes not being the same in the two types ; the 

 metathorax is more rugose in Mexicana 9, and not so excavated. 

 It resembles also the Nortonia tolteca, but is perfectly distinct 

 from it by its lengthened thorax, as high as wide and not 

 depressed and widened; by its violet wings, by its strongly 

 divided scutels, by its crenulate post-scutel, etc. 



llab. The gulf side of Mexico. I have found a female near 

 Tampico. 



16. Uf. ferruginea Sauss. — Graeillima, ferruginea dense punctata, 

 subvelutina; capite pone oculos producto ; paulo altiore quam latiore ; 

 thorace valde elongate-, compresso, angusto, metanoto postice producto, 

 suleo profnndo diviso ; abdomine gracili ; pritno segmento elongato, 

 depresso; sulco valde impresso partito ; antennarum flagello superne 

 vel omnino nigro ; clypeo et capite flavis, vertice ferrugineo-notato ; 

 abdominis segnientornn'i marginibus litnris subinterruptis flavia oruatia ; 

 alis infuscatis purpureo-nitentibus, oosta, pireeipue iu apice, ferruginea. 

 Longit, 19 mm. 



9« Clypeo piriformi, apice bispinoso ; mandibulis orenulatis. 



Variat. Omnino ferruginea, seu pedibus flavo-variis, vel thoraois suturis 

 nigris. 



Mdntezumia ferruginea Sauss. Vespides, T, 91, 7 (18")-). 



Hah. South America, Uruguay. La Plata. Patagonia 1 9. 

 ((}. Claraz.) 



