205 



depressed ; lateral furrows lanceolate ; front (face) erect, slightly tuberculate, 

 with four well-defined keels ; inner keels parallel toward the vertex, slightly 

 diverging toward the face. Outer keels very slightly curved inward. An- 

 tennae tawny, flat, setaceous, much longer than the head and the pronotum 

 together. Pronotum tuberculate, with a shght middle keel ; lateral keels 

 slightly apparent toward the hind border, which is slightly elongated and 

 forms a truncated angle. Hind femora on the inner side black, with two 

 pale yellow bands; first band post-medial, second sub-apical. Hind tibiaj 

 blue, with a white band near the base ; base black; spines white, with black 

 tips. Elytra ferruginous; costa rounded near the base. Wings blackish. 



Length of body, 0.67 to 1 inch; expansion of elytra, 1.58 to 2 inches. 



Oajaca, Mexico (Walker). 



!$TEIVOBOTHRi;!!i, Fiii>cli. 



Saussure places under the following division and subdivisions the four 

 following North American species of this genus : 



Division I. — Antenna filiform or sub-filiform — Rhammatocerus, Fisch.: 



1. Lateral carince of the pronotmn straight or nearly straight : 



St. niy!!iteciis, Sauss., Rev. et Mag. Zool., XIII (1861), 317. 



Medium size, green or testaceous-bay. Head large, conical, punctate; 

 vertex much produced in front of the eyes^rounded, and destitute of foveolae; 

 the rostrum convex above, in no way excavated. Face much deflexed, but 

 scarcely arcuate, rugulose ; costa moderately prominent, punctate, marginate 

 with parallel carinse, these evanescent above. Pronotum punctate throughout, 

 but slightly angulate posteriorly; posterior sulcus situated considerably 

 behind the middle ; lateral carinse straight, parallel, obsolete behind the pos- 

 terior sulcus, cut by the penultimate sulcus a little in front of the middle, 

 and produced in front, indistinctly upon the head, to the eyes. Posterior legs 

 slender. Elytra a little shorter than the abdomen. Antennae filiform. 



Length, 1.12 inches; elytra, 0.68 inches. 



Mexico (Saussure). 



2. Lateral carince of the pronotum arcuate or broken, and more or less 

 approximate before the middle : 



a. Rostrum of the Vertex obtuse, apex rounded : 



