Dec, I9I2.] Fall: North American Collops. 257 



punctate except very sparsely toward the sides ; the elytra feebly to 

 moderately shining in the J', usually more or less dull in the 2, rather 

 finely punctate, the lateral edge rufous or rufescent at middle in some 

 specimens, scarcely so in others; venter with more or less evident 

 lateral black spots in the d", entirely rufous in the ?, rarely with faint 

 traces of spots. Basal joint of antennas in the J" broadly triangular, 

 as wide as long or very nearly so, not sinuate posteriorly. 



In one of two examples collected at Plummer's Island, Md., by 

 Dr. Blaisdell, the sutural bead is rufescent for a short distance at 

 middle, and in the other one is entirely red, the side margin being in 

 both narrowly red at middle as is often the case. A ? from Nebraska 

 is similarly colored, but in the absence of the ^ its identity is open 

 to doubt. These specimens almost perfectly bridge the gap between 

 typical tricolor and suhlimhatus Schaef. and indicate strongly that the 

 latter may be only a color phase of the former. 



Say says that this species was taken on the Mississippi and that 

 specimens also occurred near the Rocky Mts., and a slight color 

 variety in Massachusetts. The species does not seem to be at all 

 common in the Mississippi Valley, and a special application to 

 Messrs. Wickham, Knaus, Wolcott and Liebeck brought me only eight 

 specimens. Of these three are J"s and by antennal differences evi- 

 dently include two quite distinct species, one represented by a St. 

 Louis specimen (Liebeck), the other by examples from Indiana (Wol- 

 cott) and Indian Territory (Wickham). The two species are exceed- 

 ingly similar and scarcely separable except by antennal characters. 

 The females can only be placed when associated with males. It is 

 obviously quite impossible to determine which of these species is the 

 true tricolor of Say, and since the St. Louis specimens are apparently 

 identical with the common form of the Atlantic coast region which 

 has always passed as tricolor, Say's name may best be retained for 

 this species. 



Tricolor is rather common, locally at least, from Quebec to Vir- 

 ginia, occurring as a rule at no great distance from the coast. Its 

 range in the Mississippi Valley can not now be determined. Females 

 of this type have been seen from Kansas, Nebraska and Lake 

 Superior (LeConte Coll.), but being unaccompanied by males their 

 identity is doubtful. The Indiana and Indian Territory (^<S will be 

 described below as vicarius n. sp. 



