M0NTKZUM1A. 123 



Insect ferruginous. The thorax often varied with black in the 

 sutures and upon the mesothorax. Antenna? ferruginous, with 

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

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

 of the prothorax and 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. cliff. — I think this species nearly related to M. 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. Spinolse, 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 M. infernalis Sp., with which I cannot 

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

 metathorax is more rugose in Mexicana ?, 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. 



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

 Tampico. 



16. M. ferruginea Sauss. — Gracillima, ferruginea dense punctata, 

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

 tliorace valde elongato, compresso, angusto, inetanoto postk-e producto, 

 sulco profundo diviso ; abdomine gracili ; prinio segmento elongato, 

 depresso; sulco valde impresso partito ; antennarum flagello superne 

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

 abdominis segmentoruin marginibus lituris subinterruptis flavis ornatis ; 

 alis infuscatis purpureo-nitentibus, costa, prseeipue in apice, ferruginea. 

 Longit, 19 mm. 



9- Clypeo piriformi, apice bispinoso ; mandibulis crennlatis. 



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

 nigris. 



. Montezurhia ferruginea Sauss. Vespides, I, 91, 7 (1852). 



Hob. South America. Uruguay. La Plata. Patagonia 1 ?. 

 (G. Claraz.) 



