Dec, igi2.] Fall: North American Collops. 265 



legs blackish, front and middle femora and tibiae pale. Body beneath black, the 

 margins of the ventral segments narrowly pale. Length 3^ mm. 



The unique type is a $ taken by Snow at San Bernardino Ranch, 

 Douglas, Arizona. 



Specimens collected by Dr. Fenyes at Olancha, California, and 

 by Professor Wickham at Clear Lake, Utah, are placed here pro- 

 visionally. In elytral vestiture they agree with the type but the sur- 

 face of the elytra is more shining and green instead of blue. 

 C. laticollis Horn. Trans. Am. Ent. Soc, 1870, p. 83. 



The only specimens of this species known to me are in the Horn and 

 LeConte collections, and all are from the Lower California Peninsula. The 

 head is finely, rather closely punctate, the setigerous punctures not apparently 

 coarser ; the prothorax is immaculate, the pale lateral and sutural margins of 

 the elytra are continuous around the apex; the venter is entirely red except the 

 sixth segment ; the elytra show the little faint tuberculiform elevations scat- 

 tered over the surface. The prothorax is quite strongly transverse, but careful 

 measurements of the two examples in the LeConte collection show it to be only 

 5^ wider than long, though Horn says twice as wide as long in his description. 

 The antennae are entirely pale in the <^, blackish in the 5. with joints 2-5 pale 

 along the upper edge. Basal joint in (^ not impressed on posterior face, sub- 

 triangular and about ys longer than wide as viewed from the front, the front 

 face somewhat concave; second joint strongly transverse. The form of the 

 basal joint is not very unlike that in vittatiis but the second joint of the latter 

 species is as long as wide. 



C. granellus, new species. 



Very similar in a general way to laticollis and the duller western forms of 

 vittatus, but differing from the latter by the very obviously tuberculate elytra, 

 and from both by the blue elytral vitta involving almost the entire apex. The 

 basal joint of the antenna d^) is nearly as in viHatns, triangular, slightly longer 

 than wide, the supero-anterior face flattened (but not concave), posterior face 

 not excavate. The second joint is distinctly transverse though less strongly 

 so than in laticollis, the appendage short as in the allied forms. Venter red, 

 without or with but faint traces of lateral spots. Legs almost entirely black in 

 the $, the front and sometimes the middle thighs more or less pale in the (^. 

 The size is rather greater than either vittatus or laticollis ; length 4^-5 mm. 



This is apparently a rather common species in southern Arizona 

 and is known to me from the Chiricahua Mts. (type), Santa Rita 

 Mts. (Snow), Nogales (Schaeffer), Dragoon Mts., Pierce and Pinal 

 Mts. (Wickham) ; also from St. George, Utah (Schaeffer). 



I had regarded this species as a slight variety of laticollis, but 

 the constant difference in the elytral vitt?e, and small differences in 



