618 PHYTOPHAGA. 



scarcely broader than long, subqnadrate, the surface impunctate ; elytra very closely and distinctly punc- 

 tured flavous, with the suture anteriorly, a stripe from the shoulder to the anterior transverse band, the 

 latter itself, a A-shaped band below the middle, and one or two small spots (one near the lateral, the other 

 at the sutural margin), black ; the apex of the posterior femora, the outer edge of the tibia?, and the tarsi 

 more or less distinctly, fuscous ; the underside flavous. 



Hab. Mexico, Presidio (Forrer), Colima city, Cuernavaca (Edge). 



The pattern of the elytra of C. dilatipes is again very similar to that of C. ruficornis, 

 except that the black posterior band seems to be composed of two oblique spots joined 

 together. In the male the anterior tibia? are curved and strongly dilated towards the 

 apex, and the first joint of the anterior tarsi forms a broad and flattened surface, the 

 following joints being of normal size ; in the female there is no dilatation of these 

 parts, and this sex can only be separated from that of C. ruficornis by the shape of the 

 black posterior band of the elytra. A single female specimen, from Colima city, agrees 

 in the pattern of the elytra, but has a black head and a red thorax ; in the absence of 

 additional material I look upon this form as a variety of G. dilatipes. In another 

 example (also a female), from Cuernavaca, the black markings of the elytra are almost 

 confluent. For the better recognition of G. dilatipes I may add that (if present) the 

 short anterior stripe which extends from the basal margin to the anterior transverse 

 band of the elytra is always narrower than in G. ruficornis, and distinctly concave on its 

 outer margin, while it is straight in the last-named species. 



4. Cerotoma rogersi. (Tab. XXXIV. fig. 20.) 



Black, the antennae and legs flavous ; thorax rufous ; elytra finely punctured, black, each with a spot at the 

 base, another at the apex, a transverse band at the middle, and the lateral margins, flavous. 



S • Antenna? with the third joint strongly widened, its apex deeply concave ; lower part of the face flavous. 



$ . Antennae simple ; the head entirely black. 

 Length 2\ lines. 



Hab. Costa Rica, Cache (Rogers). 



This insect is again closely allied to G. salvini and G. ruficornis, especially to the 

 former in regard to coloration, but differing in the sculpture of the head of the male. 

 From C. ruficornis, which it resembles in the last-named character, the present species 

 is, however, known by the bright red colour of the thorax and the much less strongly 

 and closely punctured elytra ; the latter are differently marked, being black, with two 

 spots and a transverse central band yellow. The transverse band is broader than in 

 G. salvini, and does not quite extend to the sutural, and rarely to the lateral, margin ; 

 the apical spot is rounded, and not in the shape of a short oblique stripe. The clypeus 

 of the male is devoid of the two curved spines which are to be seen in G. salvini, and 

 the lower part of the face is bright flavous; while in the female the head is entirely 

 black. The legs are never marked with black as in C. ruficornis. 



