774 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



edge of the wing is olive-aah ; the median vein is dark ; below a broad black loiigi. 

 tudinal stripe runs from the base of the wing out towards the outer edge. The inner 

 median line is dentate, while the outer is distinct, black, and scalloped. Marginal 

 line brown. Expanse of wings, 2 inches. (See Figs. 42, 43, p. 136.) 



97. The pine tussock moth. 



Orgyia sp. 



Order Lepidoptera ; family Liparid^. 



A larva quite different from Orgyia leucostigma occurs frequently on 

 coniferous trees, including pines, spruce, and fir. It differs from that 

 of 0. leucostigma in having a pair of large prothoracic lateral black 

 pencils. 



Larva. — Differs from 0. leucostigma in having a pair of large prothoracic lateral 

 black pencils, the posterior supra-anal tuft being as usual. The pair of lateral black 

 tufts are about half as long as the anterior pencils and project straight out from the 

 second abdominal segment, immediately in front of which is a pair of much slenderer 

 cream-colored pencils also projecting straight out. Of the four dorsal tufts, the two 

 anterior ones are smoky black, the two posterior ones dusky cream-colored. Behind 

 the dorsal tufts are three coral retractile warts, and a lateral row of coral warts. The 

 head is black. All the feet, both thoracic and abdominal, are yellowish. Length 20™™. 



In another large Orgyia larva (whether of this species I am uncertain) 

 found August 30 on the pine or spruce, the four dorsal tufts are colored 

 alike, being tinged with reddish-brown, especially towards the end. 

 Behind the last dorsal tuft are six coral warts from which pale hairs 

 radiate, and there are three greenish median retractile warts, besides 

 the lateral row of coral warts extending along the body. 



In the larva of 0. antiqua as described by Harris, the back is yellow, 

 with four yellow tufts ; the sides are dusky and spotted with red ; there 

 are two long black prothoracic pencils but no lateral prothoracic ones ; 

 but a black pencil on each side of the fifth ring, and the usual one on 

 the top of the eleventh ring ; the head is black, and there are two 

 retractile coral warts on top of the ninth and tenth rings. 



98. The white pine tufted caterpillar. 



Platifcerura furcilla Packard. 



Order Lepidoptera; family NocxuiDiE. 



(Larva, Plate xi, fig. 5). 



Found in September usually on the white pine ; a dull-red caterpillar, banded with 

 brighter red ; a white lateral line, with reddish hairs in clusters, and on the first, 

 third, fourth, and eleventh segments two long pencils of red hairs ; spinning a cocoon 

 among fallen leaves, the gray moth appearing about the middle of June. 



This is another interesting caterpillar, whose history has been traced 

 by Mr. Lintner. The worm when in the attitude of feeding, with its 

 terminal pair of legs clasps the leaves at the sheath, and extends its 

 body along a leaf until it commences to bend, when, by detaching suc- 

 cessively the first and following pairs of prologs, it forces the leaf through 



