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



in the male appear to have the intermediate antennal 

 joints stouter and more strongly serrate than those with 

 darker antennae and the head wholly nigro-caeruleous. 

 The prothorax in some specimens has a large subquadrate 

 dark patch on the disc, but in others this is reduced to two 

 spots or is altogether wanting. The sutural and marginal 

 stripes on the elytra are always continuous around the 

 apex. The extremely slender appendage of the second 

 antennal joint of the male (not shown by Westwood in his 

 figure 9c) is not easily seen. According to Fall, C. 

 marginelhis, Lee, from the Colorado Kiver, may be known 

 from C. viUatus by the very broadly ovate-triangular 

 basal joint of the antennae of the male. 



15. Collops flavolimbatus, n. sp. 

 Collops vittatus, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 114, t. 6, fig. 23 ($) {nee p. 316) {nee Say). 



Head nigro-aeneous or violaceous, the anterior margin sometimes 

 testaceous, joint 1 of the antennae (a streak along the inner face 

 excepted), 2 above in ^, 2-4 along their outer edge in $, the labrum, 

 clypeus, and base of mandibles, the prothorax (except two spots or 

 streaks on the disc, which are often absent), the suture and outer 

 margin of the elytra to the apex (more broadly so before the middle), 

 and the ventral sutures, testaceous or rufo-testaceous, the rest 

 of the elytra blue or bluish-green, and that of the under surface 

 black; clothed with fine cinereous pubescence intermixed with 

 long, erect, black, bristly hairs. Head densely, finely, uniformly 

 punctate; antennae (c^) with joint 1 curved, gradually widened 

 outwards, 2 angularly dilated at about the middle externally, the 

 appendage long and slender, curving over the apex of the joint, 

 3-10 subequal in width, 3-9 about as broad as long. Prothorax 

 transverse, shining, closely, minutely punctate. Elytra densely, 

 rather finely punctate. 



Length 3i-4, breadth 2-2|^ mm. ((J ?.) 



Hab. Mexico {Truqui ; Coffin, in Mus. Oxon.), Mexico 

 city {Hoge), Puebla, Orizaba {Salle). 



Nine males and seven females. This is the insect figured 

 by Gorham under the name C. vittatus, from which it 

 difiers in having joints 3-10 of the antennae more slender 

 (being about equal in width in the two sexes), the first 

 joint of the male much narrower and streaked with black, 

 and the second angularly dilated externally and furnished 

 with a long slender appendage in that sex. The pro- 

 thoracic markings are similarly evanescent, and the elytral 



