81 



Synoptical table of the species. 



A. Vertex witliout lateral foveoke : 



a. Median cariufe of the prouotum sub-cristiform occidentalis. 



aa. Median carime of the prouotum linear : 



h. Top of the head miuutely tricarinate tricarinatus. 



hh. Top of the head smooth : 



c. Lateral carina; of the pronotum parallel coloradus. 



cc. Lateral carinre of the prouotum more or less approximate in 



the middle : 



d. Face nearly vertical ■ - . quadrimaculatus. 



dd. Face oblique : 



c. Green, with fuscous serratures along the elytra; large size. . . admirabilis. 

 ee. Chief color brown, or striped with brown ; small size : 



/. Head ascending ; antennae, somewhat acuminate occipitalis. 



Jf. .Head horizontal ; auteunne filiform speciosus. 



AA. Vertex with lateral foveolte or tlat spaces representing them : 



a. Elytra unspotted curtipennis. 



aa. Elytra spotted : % 



b. Lateral carinte of the pronotum parallel suh-conspersus. 



hh. Lateral carinae of the pronotum approximate in the middle : 



c. Elytra extending beyond the tip of the abdomen : 



d. Elytra chiefly green : maculipennis. 



dd. Elytra brownish propinquans. 



cc. Elytra equal to or shorter than the abdomen : 



(Z. Face nearly vertical, curved below hrunncus. 



dd. Face oblique, straight or nearly so : 



e. Edges of the vertex raised (cqualis. 



ee. Edges of the vertex not raised hilineatus. 



I cannot locate pelidnus, but it would appear to belong with ?naculipenms 

 and propinquans ; gracilis, Scudd., is omitted from the table for the same 

 reason, though evidently closely allied to maculipennis. 



Division I. — Face oblique ; head sub-conical. 



Sub-division 1. — Antennge slightly enlarged near the base, somewhat 

 acuminate at the apex, and slightly flattened or sul)-triquetrous. 



This sub-division includes but one species, St. occipitalis, Thos., which 

 possibly future investigations may show to be generically distinct. 



St. occipitalis, sp. nov. 



Head ascending, pyramidal; occiput elongate, convex; vertex short, not 

 expanding in front of the eyes, sub-hexagonal, margins raised ; no regular 

 lateral foveolas, but on each side, under the projecting front, there is often a 

 shallow, triangular depression. Face quite ol)lique, straight; frontal costa 



11 A 



