THE PAINTED HICKORY BORER 179 



Horn (1880) differentiated the hickory-boring species from the locust- 

 boring species as follows: 



C. pictus Drury 



The prosternum is longer than wide, truncate at tip and not prolonged. The second 

 joint of hind tarsus glabrous at middle. The elytra are obliquely truncate at tip but 

 not prolonged. The antennae of the male are always longer than the body resembling 

 in this respect antennatus. 



Lives in Hickory wood and appears early in Spring, and is abundant wherever that 

 tree occurs and is often very destructive. 



C. robiniae Forst. 



Closely resembles pictus in form and coloration but differs in the antennal characters 

 of the male and the structure of the hind tarsi. The prosternum is as broad as long 

 being wider than in pictus and also truncate at tip. The legs are also shorter than in 

 that species, the hind thighs not reaching the tip of the abdomen in the male. 



Infests Locust wood (Robinia pseud-acacia), and appears in the Autumn. I have 

 seen a variety of this species with the W-shaped band entirely obliterated. 



Moffat (1882) in speaking of the confusion that existed in literature 

 between the hickory and locust borers, differentiated the two species as 

 follows : 



In pictus the body is uniformly more slender and tapers more behind than robinia. 

 In pictus the antennae is [sic] decidedly longer, that of the females reaching to the 

 end of the body, and that of the males beyond. The third or W-band on the wing 

 covers is noticeably more delicate than in robinia, and quite white in contrast to the 

 yellow of the other's markings, a characteristic I have never seen in any robinia I ever 

 met with (and I see them here in hundreds every fall feeding on the Goldenrod), and 

 one which would of itself make it quite easy to pick out my pictus, male or female, 

 from amongst any quantity of robinia they might be mixed with. 



That same year, Horn (1882), fearing that there might be some difficulty 

 in properly distinguishing the species by the characters mentioned by 

 Moffat (1882), again referred to the more definite characters for disting- 

 uishing the two species as given by him in 1880, and added, as another 

 distinguishing character, that in pictus the W-shaped band rarely joins 

 the transverse band, while in robiniae this band nearly always joins the 

 transverse band at the suture. 



Riley and Howard (1892) mentioned specimens of the hickory borer 

 having been sent to them with the complaint that they were abundant in 

 dwelling houses. The insects had emerged from hickory wood that was 

 used for fuel. 



Bruner (1893) stated that hickories in Nebraska were subject to attack 

 by this beetle. He gave a brief description of the adult, also mentioning 

 the time of its emergence, and suggested control measures. 



Hopkins (1895) mentioned finding a hickory log containing a great 

 number of the larvae and pupae of the hickory borer, and having numerous 

 holes in the bark, indicative of the emergence of the adults. However, 

 no adults were found in the wood altho larvae and pupae were abundant. 



Webster and Mally (1897) reported the receipt of a section of an osage- 



