358 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
showing BOOM indistinct furrows on its surface; the other abdominal segments have 
tin- usual protuberances, on the dorsal as well as the ventral side, marked with 
wrinkles. The last segment is short and divided in two halves by a transverse fold; 
the latter half has the anal opening at the tip. All these segments-are beset with 
short golden hairs on the sides. There are no feet, as in the Lamii. (Oaten Sacken.) 
The pupa has numerous pointed granulations OH the prothorax; similar granula- 
tions ending in sharp points are placed in a row on the dorsal segments of the abdo- 
men, near the posterior margin; the same segments have, more anteriorly, a few 
similar sharp, horny projections. On the penultimate segments these projections 
are larger and recurved anteriorly at the tip ; there are six in a row near the poste- 
rior margin, and two others more anteriorly. The last segment has four similar pro- 
jections in a row. (Osteu Sacken.) 
The beetle. — Body velvet-black, and ornamented with transverse yellow bands, of 
which there are three on the head, four on the thorax, and six on the wing-covers, 
the tips of which are also edged with yellow. The hrst and second bands on each 
wing cover are nearly straight; the third band forms a V or, united with the 
opposite one, a W ; the fourth is also angled, and rune upwards on the inner mar- 
gin of the wing-cover towards the scutel ; the tifth is broken or interrupted by a 
longitudinal elevated line; and the sixth is arched, and cousists of three little spots. 
The antemue are dark brown, and the legs are rust red. These insects vary. from 
six-tenths to three-fourths of an iuch in length. (Harris.) 
Dr. Horn has defined the characters by which this species may be 
separated from C. picUts as follows : 
If we examine the under side of the two species, noting the form of the prosternal 
process, it will be observed that this in robinio? is nearly square, so that the front 
coxa- are moderately widely separated. The second joiut of the hind tarsi is densely 
pubescent over its entire surface. The male antemue are rarely longer than three- 
fourths the length of the body, and but little if any stouter thau those of the female. 
Generally the W-band nearly always joins the trausverse band at the suture. 
C. pictus, however, has a narrow prosternum, nearly twice as long as wide. The 
male antenme are much stouter and at least a fourth longer thau the body. The W- 
baud rarely joins the transverse band. On the hind tarsi the second joint is nearly 
glabrous along its middle. 
The two species differ also in habitat aud time of appearance, pictus living in the 
hickory and appearing in early spring, while robinice bores the locust and appears in 
the autumn. (Can. Eut., xiv, p. 240.) 
Remedies. — An excellent way to save a valuable shade tree from the 
attacks of this borer is to thoroughly soap the truuk late in August, so 
as to prevent the beetle from layiug its eggs early in September. All 
insects breathe through little holes (eighteen or twenty in all, nine or 
ten on each side) ; now, if a film of soap or grease or oil of any kiud 
closes the openings of these breathing pores, the air can not enter the 
respiratory tubes which ramify throughout the interior of the body and 
the insect dies by asphyxiation — i. c, drowns. Harris states that white- 
washing aud covering the trunks of the trees with grafting composition 
may prevent the female from depositing her eggs upon isolated trees. 
Also, young trees might be headed down to the ground, so as to destroy 
the grubs boring in them, aud also to promote a more vigorous growth. 
An excellent preventive remedy is to collect these beetles early in Sep- 
tember when engaged in eating the pollen of the golden rod ; children 
could perform this labor. 
