aind Central American Malachiidae and Melyridae. 35 



outwards, convex witliin, rounded at the outer apical angle; 2 

 broader than long, angularly dilated at about the middle externally, 

 and with a very long, stout, strongly retractile appendage, the 

 matted pencil of long hairs at the tip of the latter in repose curving 

 round to the lower surface at the apex of the joint; 3-9 feebly 

 serrate, subequal. 



Length 3^i mm. (c?$.) 



Hah. Mexico, Northern Sonora, Chihuahua, Vera Cruz, 

 Oaxaca, Chiapas; Guatemala, San Geronimo, etc. 



Not uncommon in Mexico and Guatemala. The speci- 

 mens quoted by Gorham from Panama belong to his 

 C. intermedius, those from Etla and Ventanas, Mexico, to 

 C. 4:-maculatus, and the others to the present species. 

 The latter is extremely hke C. i-maculatus, but is separable 

 therefrom by the differently shaped first and second joints 

 of the male-antenna, and the very elongate, stout appendage 

 to the second joint. The head is always testaceous between 

 the points of insertion of the antennae in the male, the 

 pale border being much narrower in the female. The 

 elytral spots vary in size. One specimen {(^), amongst 

 several from Misantla, Vera Cruz, has the femora testaceous, 

 as in C. femoratus, Schaeff . (a male of which from Nogales 

 is before me), from Arizona, the latter having a more 

 closely punctate, dull, black head, and the basal joints of 

 the antennae differently shaped. A large male from 

 Guatemala city, apparently belonging here, is almost as 

 shining as C. geminus, from which it differs in the uni- 

 formly punctured head. C. histrionicus is, in fact, one of 

 several very closely alhed, similarly coloured forms, which 

 can only be satisfactorily identified by the structure of the 

 male antenna. Mr. Fall has been kind enough to send me 

 a pair of the species identified by him as C. histrio, Er., 

 from the same region as the type, CaHfornia, and there is 

 no reason to doubt the correctness of his identification. 

 The true C. histrio has more coarsely punctate elytra 

 than C. histrionicus, and the first joint of the male-antenna 

 excavate posteriorly and angularly dilated at the outer 

 apical angle (as in C. blandus), and the second joint sub- 

 angularly dilated at about the middle externally. C. 

 scutellatus and C similis, Schaeff., from Texas and Utah 

 respectively, both based on insufl&cient material, are un- 

 known to me ; but they are not hkely to be conspecific with 

 the insect here described under the name C. histrionicus. 



