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



Three males and five females. Very hke C. frontalis 

 and C. paradoxus, but with the head wholly violaceous, 

 the abdomen in part black, the prothorax less transverse 

 and more closely punctate, and the elytra more rounded 

 at the apex; the head with a small pohshed space on 

 each side between the eyes anteriorly, the basal joint 

 of the antennae broadly subsecuriform, and the second 

 joint with a long slender appendage, in the male. In the 

 female from Puebla the basal joint of the antennae is 

 entirely testaceous and the tarsi are rufo-piceous. A 

 small female from Ciudad in Durango (length 3^ mm.) 

 seems also to belong here. 



10. Collops nigriceps. 



Malachius nigriceps, Say, Journ. Acad. Phil, iii, p. 183 



(1823) ; Amer. Ent. iii, and Complete Writings, i, 



p. 108, t. 48, fig. 3 {nee 2). 

 Collops nigriceps, Er., Entomographien, p. 56 (?) ; Horn, 



Trans. Am. Ent. Soc. iii, pp. 80, 81; Fall, Journ. N. 



York Ent. Soc. xx, pp. 252, 262. 

 Collops eximius, Er., loc. cit. (^$) ; Lee, Proc. Acad. Phil. 



vi, p. 164. 

 Var. Collops floridanus, Schaeff., Canad. Ent. xHv, p. 185 



(1912). 



(J. Black, shining, the antennae, the head between their points of 

 insertion, the base of the mandibles, and the abdomen testaceous, 

 the prothorax and femora rufo-testaceous, the elytra bluish-green; 

 clothed with fine cinereous pubescence intermixed with erect, long, 

 scattered, bristly hairs. Head very minutely punctate, with a 

 depressed, polished, glabrous space on each side before the eyes; 

 antennae with joint 1 stout, oblong, widened from near the base, 

 2 with a long, slender appendage reaching to the middle of 3, 3-10 

 moderately serrate, rapidly tapering outwards, 3 very stout, nearly 

 as long as 4 and 5 united, 4-9 about as long as broad. Prothorax 

 moderately transverse, very sparsely, minutely punctate. Elytra 

 rugulose, densely, finely punctate, bluntly rounded at the tip. 



Length 5, breadth 2^ mm. 



Hab. United States, Atlantic Coast fine from Massa- 

 chusetts to Florida, Gulf Coast as far as Mobile ; Mexico 

 {Mus. Brit.). 



The above description is taken from a specimen ((^) of 

 the var. floridanus received by the British Museum in 1855, 



