COLYPHUS. 143 
Head black, the front yellow ; antenne not much serrate, but without any club, clear 
red: two impressions close together between the eyes. Thorax short, the sides much 
rounded between the constricted lines. Legs entirely red. The elytra have the margin 
yellow, and a vitta, which, commencing in the centre of the base, runs rather close to 
the suture, and then turns outward to join the pale margin, also clear yellow. The 
sharpness of these markings gives this species a very distinct appearance. The abdomen 
is black, with the posterior margins of the segments narrowly whitish. 
A single specimen is all that I have yet seen. 
Section B. Antenne with the three terminal joints forming a lax, indistinct club. 
8. Colyphus distinctus. (Tab. VII. fig. 19.) 
Derestenus distinctus, Chev. Rev. et Mag. Zool. 1874, p. 38°. 
Hab. Mexico, Yucatan !, Cordova, Playa Vicente (Sallé); Cerro de Plumas (Hége) ; 
GuatEMALA, Senahu, Zapote (Champion) ; Panama, Volcan de Chiriqui (Champion). 
More parallel than C. quadrilineatus; the pale vitte equidistant from the suture and 
margin ; thoracic vitta usually entire, wide at the base; femora pale; knees and tibie 
dark, posterior pair sometimes pale ; abdomen pale. 
9. Colyphus vittipennis. 
Derestenus vittipennis, Chev. loc. cit. p. 389+. 
Hab. Mexico 1, Cordova, Tuxtla (Sallé), Cerro de Plumas (Hoge). 
Differs from C. distinctus by the black abdomen, a single spot on the front margin of 
the thorax, and by the narrower form. 
10. Colyphus signaticollis. (Tab. VII. fig. 22.) 
Colyphus signaticollis, Spin. Mon. i. p. 185", t. 5. fig. 5. 
Colyphus cinctipennis, Spin. loc. cit. p. 136°, t. 5. fig. 6. 
Hab. Cattrornia!?; Mexico, Cerro de Plumas, Oaxaca (Hoge); GuaTEMALA, Cape- 
tillo, Zapote, San Gerdnimo, Teleman, Purula (Champion); Panama, Volcan de Chiriqui 
(Champion). 
The species which I believe is to be referred to this name is very variable, but is in 
general to be recognized by its rather long elytra, which are thickly and confluently 
punctate, and which, varying from nearly entirely ferruginous red to steel-blue, have 
nearly always more or less of a bluish tint. The thorax is sometimes yellow, with one 
frontal spot ; sometimes the disk is black. The legs are generally testaceous red, with 
the knees and tibiz more or less black. ‘The underside is also variable, being quite red in 
paler examples, or with a black abdomen in others. The figure is of an example from 
the Volcan de Chiriqui, in which the elytra are of a deep blue, and the legs are black. 
The specimen from Oaxaca agrees very closely with the figure in Spinola, tab. 5. 
fig. 5, while two from Cerro de Plumas seem referable to fig. 6 on the same plate. 
