and Central American Malachiidae and Melyridae. 21 



sometimes testaceous in the female. Hoge sent a long 

 series from Durango. The dark portion of the head is 

 angularly excised in the middle in front in all the specimens 

 before me, irrespective of sex. Fall (loc. cit.) gives the 

 N. -American distribution as " Kansas to the desert regions 

 of southern Cahfornia," and states that he has seen speci- 

 mens from Colorado, New Mexico, Utah, and Arizona. 

 According to Mead (Amer. Nat., 1899, pp. 927-929) G. 

 bipunctatus is said to destroy Doryphora. 



3. Collops aulicus^ 



Collops aulicus, Er., Entomographien, p. 55; Gorh., Biol. 

 Centr.-Am., Coleopt. iii, 2, p. 113, t. 6, figs. 21 {^), 

 22 (?). 



^. Antennae with joints 1 and 2 testaceous, streaked with black ; 



1 broad, subtriangular, hollowed and smooth at the apex posteriorly 

 above, and with the outer apical angle produced into a sharp tooth ; 



2 very large, subangularly raised towards the apex above, the apical 

 excavation strongly transverse, and with a very long, slender 

 appendage. 



Apparently not uncommon in Mexico, and recognisable 

 by the broad blue vitta on the disc of the prothorax, the 

 wholly caeruleous elytra, the blue, densely punctured, 

 closely pubescent head, with the anterior margin in the male 

 broadly, and in the female narrowly, testaceous, the bluish- 

 black legs, and the testaceous abdomen. Gorham's figure 

 of the male (21) shows the shape of the first antennal joint, 

 but the appendage on the second is not clearly indicated. 



The uniform sculpture of the head and the form of the 

 male-antennae separate C. aulicus from similarly-coloured 

 C. nigriceps (eximius). The black-legged insects from 

 Utah and Arizona doubtfully referred by Fall to C. mar- 

 ginicollis, Lee. (Journ. N. York Ent. Soc. xx, p. 260), 

 possibly belong here. The latter differs from C. aulicus in 

 having a smoother head, and subtuberculate elytra, and 

 joints 3-10 of the male-antennae strongly serrate and the 

 appendage of the second joint much shorter. 



4. Collops paradoxus, n. sp. (Plate II, fig. 1, basal joints 

 of ^-antenna.) 



Collops tricolor, Er., Entomographien, p. 57 (9) (1840) 

 (part.) ; Gorh., Biol. Centr.-Am., Coleopt. iii. 2, pp. 113, 

 313, t. 13, figs. 1, la (gynand. ?) (part.). 



