248 ■ PROCEEDINGS OF THE ACADEMY OF [PaRT II 



mina, more ample and distinctly more flattened pronotum, teg- 

 mina with costal margin less decidedly oblique in distal portion, 

 features of the genitalia and somewhat less decidedly atrophied 

 armament of the cephalic femora. 



The annulate antennae afford a striking feature of coloration. 



Type: cf ; Fazenda do Sobrado, near Passo-Quatro, Minas Geraes, 

 Brazil. June. [Paris Museum.] 



In addition to the characters given in the generic description on 

 page 214, we record the following. Eyes extending briefly ventrad 

 of antennal sockets, convergent lateral margins of cheeks to clypeal 

 suture brief. Interocular space slightly over half width between 

 antennal sockets. Maxillary palpi with fifth joint large, slightly 

 shorter than third, fourth joint two-thirds as long as third joint. 

 Pronotum with bosses of disk smooth, showing a somewhat lyrate 

 pattern; other portions, including weak bosses at humeral shoulders, 

 heavily impresso-punctate. Tegmina moderately coriaceous, ex- 

 tending distinctly beyond cereal apices, margins converging evenly 

 distad. Wings with rolls of folded appendicular fields lying ob- 

 hquely. Median segment as described for dasciUoides. Supra- 

 anal plate with length equal to about one-fourth proximal width, 

 suddenly and strongly concave in meso-distal portion, lateral mar- 

 gins convergent and forming rather broadly convex projections on 

 each side of this area, moderately supplied with long hairs in these 

 portions, median section of margin nearly transverse, showing a 

 very feeble convexity, without hairs. The ventral surface of this 

 plate is symmetrically specialized, mesad on each side at the base 

 of the projecting portions it is produced in a transverse and chiti- 

 nous triangular projection, with apex acute and curved outward 

 toward each side, these fang-like processes lie on the deeply concave 

 faces of two large subchitinous, symmetrical plates, which, spring- 

 ing from near the cereal bases, are transverse and vertical, reaching 

 to the anal opening. Subgenital plate small and nearly symmetri- 

 cal, lateral margins equally oblique, the sinistral very feebly convex, 

 the dextral as feebly concave, rounding into the transverse distal 

 margin at the style sockets. Styles similar, simple, straight, cylin- 

 drical, not tapering except at the rounded apex, each about six 

 times as long as its width, three-quarters as long as the distance 

 between the style bases. Cephalic femora with ventro-cephalic 

 margin supplied distad with minute, piliform, well separated spines, 

 terminated by a single elongate, heavy distal spine. 



Allotype: 9 ; same data as type. [Paris Museum.] 



Agrees closely with the male sex, difi"ering in the following fea- 

 tures. Interocular space wider, nearly as wide as that between the 

 antennal sockets. Tegmina and wings showing some slight reduc- 

 tion, extending to cereal apices. Dorsal surface of abdomen un- 

 specialized. Supra-anal plate slightly over two-fifths as long as 

 proximal width lateral margins nearly straight, oblique to the 



