Dec, I9I2.] Fall: North American Collops. 271 



I have seen the unique c? type which is quite distinct in color from 

 anything else known to me. 



C. similis Schaef. Can. Ent., 191 2, p. 187. 



Pale rufous, moderately shining, elytra 4-maculate. Head black, pale in 

 front as far as the eyes, finely punctulate. Prothorax entirely red, polished, 

 with a few fine punctures especially toward the sides. Elytra closely but not 

 very coarsely punctate, the spots blue or green, the posterior one larger and 

 oval not attaining the margins. Venter pale red without obvious lateral spots; 

 four anterior legs red, hind legs black, the hind thighs rufescent basally. An- 

 tennae ((^) moderately serrate, pale throughout or with outer joints slightly 

 dusky; basal joint subtriangular, a little longer than wide, rather thick, not 

 excavate posteriorly, not very unlike that in vittatus ; second joint slightly 

 wider than long, appendage short. 



I have seen only two examples of this species, both 3's ; one a 

 cotype from Mr. Schaeffer labeled simply Utah, the other from St. 

 George, Utah, collected by Wickham. 



C. tibialis Schaef. Can. Ent., 19 12, p. 186. 



Very similar in form, size and color to 4-maculatJts, the upper surface bright 

 rufotestaceous, the head black, labrum, epistoma and frontal margin yellow, the 

 latter trilobed in its posterior outline, the lateral lobes extending to the eyes, 

 the middle one to a little beyond a line tangent to the anterior margins of the 

 eyes. Antennae blackish in both sexes, the basal joint alone pale in the <^, the 

 second and third partly so in the 5- Prothorax immaculate and nearly smooth, 

 elytra densely punctate and rather dull, the spots large, blue, either separated 

 or narrowly longitudinally confluent, the posterior spots rather broadly involv- 

 ing the lateral margin. Abdomen bright red with large lateral black spots ; legs 

 black throughout or with tibiae and tarsi red. Length 3^-4 mm. 



Chiricahua Mts., Arizona, 3 c^'s, i 2. Nogales, Ariz., i $ (Wick- 

 ham) ; Ft. Wingate, New Mexico (Liebeck). 



This species is very like 4-maculatus but differs in many details. 

 In addition to those mentioned in the table, it may be said that the 

 color is rather brighter, the basal antennal joint in the c^ is not quite 

 so thick and the dilated joint is a little different in form and with 

 much longer appendage. In all of the males seen the elytral spots 

 are confluent, not so in the two females. In the series from the 

 Chiricahuas the legs are entirely black; in the Nogales ? the tibiae 

 and tarsi are rufous. In a specimen from Ft. Wingate, New Mexico 

 (Liebeck Coll.), the prothorax has two small discal black spots. 



