24 Ml'. G. C. Champion's Revision of the Mexican 



In this species the head is nigro-caeruleous to the anterior 

 margin, the prothorax, femora, coxae, and abdomen are 

 rufo-testaceous, and the elytra violaceous, blue, or greenish. 

 In two examples from Etla, Mexico, the intermediate 

 and posterior femora are infuscate. The Guatemalan 

 types have all three femora rufo-testaceous. The six males 

 before me have a rudimentary appendage to the second 

 antennal joint. C. honestus, Er., from the Orinoco, de- 

 scribed from a single male, must come near C. femoralis ; 

 it is said to have the apices only of the femora testaceous. 



8. Collops brevicollis, n. sp. (Plate II, fig. 2, ^.) 

 Bluish -black, the labrum and clypeus, the base of the mandibles, 

 the prothorax, and abdomen rufo-testaceous, the elytra violaceous ; 

 the antennae with joints 1 and 2 above, and 3-6 on their outer face, 

 testaceous, for the rest black ; clothed with fine cinereous pubescence 

 intermixed with very long, erect, black, bristly hairs. Head 

 moderately broad, densely, finely punctate, bluish-black to the 

 anterior margin, much narrowed anteriorly; antennae ((J) with 

 joint 1 curved, abruptly widened outwards, subsecuriform, 2 longer 

 than broad, angularly dilated at the base and towards the apex 

 externally, without appendage, 3-10 gradually diminishing in width, 

 3-9 strongly transverse, stout, serrate, (?) joint 1 oblongo-conic, 

 lineate with black, 2 stout, broad. Prothorax broad, strongly 

 transverse, truncate in front, shining, sparsely, minutely punctate. 

 Elytra coarsely, densely punctate, bluntly rounded at the apex. 

 Length 41, breadth 2|-2| mm. ((J ?.) 



Hab. Mexico, Ciudad in Durango 8,100 feet {Forrer : (^), 

 Ventanas in Durango [Hoge : $). 



One pair. Near C. paradoxus and C. frontalis, differing 

 from both of them in the non-appendiculate second antennal 

 joint of the male, these organs being comparatively short, 

 tapering, and conspicuously testaceo-hneate externally 

 to near the tip in both sexes. The prothorax is very short 

 and broad, the elytra broad and coarsely punctate. From 

 C. tricolor the present species may be separated by the broad 

 head and prothorax, and the coarsely punctured elytra ; and 

 in the male by the strongly transverse, stout intermediate 

 joints of the antennae and the basally angulate second joint. 



[Collops tricolor. 

 Malachius tricolor, Say, Journ. Acad. Phil, iii, p. 182; 

 Amer. Ent. iii, and Complete Writings, i, p. 107, t. 48, 

 fig. 3 {nee 2) (?). 



