40 Mr. G. C. Champion's Revision of the Mexican 



There is a pair of this species in the British Museum, the 

 male being now described for the first time. C. ludicrus 

 resembles C. geminus, var. decorus, in colour, except that 

 the blue elytral spots are rather smaller; but is easily 

 recognisable by the toothed basal joint of the antennae of 

 the male. The testaceous portion of the head is similarly 

 excised in the middle in both sexes, but the depressed area 

 on each side in front is shallow and inconspicuous. The 

 male of C. dux, Fall, from Texas, appears to have a similarly 

 formed basal joint to the antennae.] 



24. Collops conspicillatus, n. sp. (Plate II. figs. 7, 7a, ^.) 



(J. Black, the base of the mandibles, the inter-antennal portion 

 of the head, the basal joint of the antennae (except a broad streak 

 along the upper face), the concave upper portion of the second 

 joint, the prothorax, the elytra in part (except a narrow common 

 fascia at the base and a large subapical patch not reaching the 

 outer margin), and abdomen rufo-testaceous, the rest of the elytra 

 blue or violaceous and that of the head bluish-black ; clothed with 

 fine cinereous pubescence intermixed with long, erect, black, bristly 

 hairs. Head (fig. la) densely, finely pimctate, with a polished, 

 aeneous, subglabrous, concave space on each side anteriorly; 

 antennae with joint 1 curved, moderately widened outwards, 2 

 with a very long, slender, curved appendage, 3-9 feebly serrate, 

 subequal in width. Prothorax shining, broad, transverse, sparsely, 

 minutely punctate. Elytra densely, rather coarsely punctate. 



Length 4|, breadth 2| mm. 



Hab. Mexico, Omilteme in Guerrero, 8,000 feet {H. H. 

 Smith). 



Four males. This species agrees with C. geminus 

 (decorus) in having a concave, smoother, subglabrous 

 space on each side of the head anteriorly; but in general 

 appearance it is more hke C. histrionicus, except that the 

 prothorax is broader and the blue basal portion of the 

 elytra is much less developed. 



25. Collops nigritus. 



Collops nigritus, Schaeff., Canad. Ent. xhv, p. 185 ((J); 

 Fall, Journ. N. York Ent. Soc. xx, pp. 252, 259 {<$). 



$. Opaque, somewhat convex, black, the labrum, the base of 

 the mandibles, the basal joint of the antennae in part and the outer 



