207 



costa narrow, sulcate ; carinae straight, approximate above, slightly divergent 

 below. Rostrum of the vertex trigonal, foveolate ; margins acutely carinate, 

 distinctly angulate (as in Toinonotus) ; lateral foveola almost linear, situated 

 under the margin of the rostrum somewhat in front. Pronotum compressed, 

 posterior extremity obtuse-angled ; lateral carina3 slightly arcuate, somewhat 

 distant; transverse furrows sinuous, the posterior deeply impressed, situated 

 a little behind the middle ; posterior lobe slightly punctate. Posterior femora 

 sub-inflated. Elytra much longer than the abdomen. Wings fuscous. 



Length to tip of elytra, 0.96 inch. 



Mexico (Saussure). 



St. luexicaiiii!^, Walk., Cat. Dermap. Salt., IV, 756. 



Male. — Grass-green. Head and pronotum marked on each side with a 

 whitish, brown-bordered line, which extends from the eye to the base of the 

 elytra. Head elongate; tip of the vertex concave, nearly triangular; the 

 furrow (foveola) on each side linear; front (face) oblique, with four distinct 

 keels, which diverge toward the face, the inner pair connected at their junc- 

 tion with the tip of the vertex. Pronotum with three very slight keels; 

 lateral keels occupied by the two lines, parallel from the fore border to the 

 first transverse furrow, very slightly diverging from thence to the hind border, 

 which is rounded. Abdomen testaceous, a little shorter than the hind femora. 

 Hind femora with a brown stripe beneath ; hind tibiae with a paler band near 

 the base. Elytra nearly pellucid, with a grass-green, lanceolate stripe on the 

 costa and another on the hind border ; a row of pale-brown dots between the 

 stripes, and three very irregular rows of very pale-brown dots in the exterior 

 part. Wings slightly cinereous, brownish about the apical part of the exterior 

 border; a brown streak along the exterior part of the costa; veins black, 

 testaceous at the base and along the interior border. ^ 



Length of the body, 0.79 inch; expansion of elytra, 1.25 inches. 



Oajaca (Walker). 



Remark (Walker). — The structure of the tip of the vertex will distin- 

 guish it from St. viatorius, and the slight transverse furrows of the pronotum 

 from St. tepanecus. The lateral keels of St. mystecus are parallel. 



SI. decif^Hs, Walk., Cat. Dermap. Salt., IV, 757. 



Male. — Pale-testaceous. Head and pronotum have on each side a black 

 stripe, which is concise on the inner side and diffuse on the outer side, and 



