610 PHYTOPHAGA. 



The only specimen obtained by Mr. Champion differs in the following way from 

 S. rufo-femorata : the underside and the legs are black, the antennae are entirely 

 rufous, and the elytra have the shoulders acutely raised in the shape of a short costa 

 which terminates before the middle ; all the rest agrees with S. rufo-femorata. 



3. Scelidopsis guatemalensis. 



Black, the head, thorax, and scutellum rufous ; elytra dark bluish, opaque, impunetate. 

 5 (?). The thorax without discoidal depressions. 

 Length 3 lines. 



Hab. Guatemala, Sinanja in Vera Paz (Champion). 



Two examples. S. guatemalensis differs from S. rufo-femorata in the black under- 

 side and similarly-coloured legs (the base of the anterior femora in one specimen, 

 however, is rufous) ; and from S. subcostata in the colour of the antennae, and in the 

 want of the elytral costa. Whether the specimen without thoracic depressions repre- 

 sents another species or the female sex of 8. guatemalensis I am unable to say. Both 

 examples were obtained at the same locality, and, except in the sculpture of the thorax, 

 agree perfectly with each other. 



The typical specimen has the depressions on the thorax as in the two preceding 

 species. 



CHTHONEIS. 



Chthoneis, Baly, Ent. Monthly Mag. i. p. 135 (1864) . 



Chthoneis possesses most of the structural characters of Scelida, but may generally 

 be distinguished from that genus by the short second and third joints of the antennae 

 and the more transversely shaped thorax ; one species is further distinguished by the 

 dilated intermediate joints of the antennae in the male insect. 



The few species known are from Central or South America ; one only was known 

 to the author of the genus. 



The insect described by me under the name of Chthoneis smaragdipennis (P. Z. S. 

 1879, p. 786) is here referred to another genus. 



1. Chthoneis jansoni. 



Chthoneis jansoni, Jac. P. Z. S. 1879, p. 786 \ 



Var. Head black ; the basal as well as the apical joints of the antennae flavous. 



Eab. Mexico, Cordova, Toxpam, Cosamaloapam (Salle), Jalapa (Edge) ; Nicaragua, 

 Chontales (Janson \ Belt) ; Panama, Bugaba, Volcan de Chiriqui, David (Champion). 



Since the description of this species was published, a great many more specimens 

 have been received ; amongst these are some which have the head black. The antenna? 

 in the male insect are considerably longer than, in the female only as long as, the body ; 



