31 



This method has the advantage of not only destroying the Canker- 

 worms before they have had time to commit very serious depreda- 

 tions, but it win also destroy all of the other leaf-eating insects 

 which may be found upon the trees. It is also used with very good 

 success in exterminating the well known Apple-worm [Carpocapsa 

 pomoiiella, Linn,) a small, whitish, sixteen-legged caterpillar which 

 lives within apples, Siberian crab-apples, and in various other 

 fruits. 



DESCRIPTIVE. 



As this insect has not been treated of in any of the former 

 reports of this department, we append herewith a description of it 

 m its various stages : 



Hibernia tiliaria — Egg. — Elliptic-ovoid, pale yellowish, covered 

 with fine, sometimes nearly obsolete raised lines which form shal- 

 low, hexagonal cells ; length, nearly one-twenty-fourth of an inch. 

 (This egg closely resembles that of the Spring Canker-worm Moth 

 [Anisopteryx vernata, Peck].)* 



Larva. — Body provided with only ten legs ; yellow, marked on back 

 with ten black lines, which sometimes impart to the ground color 

 a bluish tinge ; the lowest line is wavy, uniting with the one above 

 it on the middle or anterior part of each segment ; venter yellowish- 

 white ; head yellowish-brown ; length, about one inch. The body is 

 sometimes marked with irregular, dusky blotches. 



Chrysalis. — Of the normal shape, terminating posteriorly in a 

 slender, black spine, two-pronged at the tip ; color, a dark or yel- 

 lowish-brown ; length, from seven to nine-sixteenths of an inch. 



Male Moth. — Fore- wings pale brownish or dull yellowish, crossed 

 by two dark-brown bands, one at about one-third the distance from 

 the base to the tip of the wing, the other about midway between 

 this one and the outer margin ; in the space between these bands, 

 nearest to the front edge of the wing, is a brown dot; hind-wings 

 somewhat transparent, yellowish-white, sometimes with a brown dot 

 in the center; antennae pectinate; expands about one and three- 

 fourths inches. 



Female Mo^/i.— Wingless ; body white, dotted with black, and 

 marked on the back with two rows of black spots, and with a row 

 of smaller black spots low down on each side of the body; legs 

 ringed with black and white ; antennae filliform ; length of body, in- 

 cluding the head, nearly one-half of an inch. 



* Figured in Riley's Seventh Report, page 80, flg. 14 h, and reproduced m his Eighth 

 Report, page 13, fig. 3. Those figured in his Second Report, page 94. fig. 66 a and b, and re- 

 produced ia LeBaron's Second Report, page 99, and also in Thomas Second Repprt. page 

 110. flg. 24. do not belong to this species, but to the Fall Caaker-worm Moth [Anisopteryx 

 antumnata, Packard.) This latter species— as Prof. Riley pointed out in his Seventh and 

 Eighth Reports— is the one referred to as the Ahlsoptery.c rernata. by Dr. Hams, on page 

 461 of His excellent work on the "Insects Injurious to Vegetation, while the species which 

 he calls pometaria is the true vernata of Peck. 



