1893.] 1 i 3 [Packard. 



as the prothoracic p]ate, and a bristly, concolorous plate on the outside 

 of the anal legs. 



The body is smooth, without the granulations of H. maia and without 

 the lateral reddish band of H. io. The body is pale, sea-greenish, with 

 irregular brown spots and slashes in the spaces between the spines of the 

 subdorsal rows, and they also occur lower down near the spiracles, which 

 are yellow, edged with dark brown. Thoracic legs dark honey-yellow ; 

 abdominal ones washed with cherry reddish. 



The eversible glands were not everted in any of the six specimens, but 

 their position is indicated, as in H. maia, by an irregular oval, liver- 

 colored patch behind the first thoracic and eighth abdominal spiracles. 



Fig. IS represents the dorsal spines of the three thoracic segments re- 

 spectively. I, one of the dorsal prothoracic spines, in which the spinules, 

 with long setae, are scattered along the whole length of the main trunk ; 

 II, one of the dorsal spines of the second thoracic segment, surrounded at 

 the base by a dense thicket of acute spinules, the latter not bearing a 

 terminal seta ; III, a dorsal spine from the third thoracic segment, form- 

 ing a short, broad tuft or clump of non-setiferous. but acute spinules, the 

 clump having a broad base, from near the centre of which arises a long 

 spinule, bearing a slender seta, like those near and at the ends of those in 

 front. The two dorsal rows of abdominal spines extend back to and in- 

 cluding the seventh uromere. 



FAMILY LASIOCAMPID^. 



On the lilattened and Scale-like Hnirs of the Lasiocampidm. — Dr. T. W. 

 Harris* describes an Acronycta larva, A. americana, as " beset with a 

 few long black bristles dilated at the end," and again says, "the long, 

 black, spear-headed hairs grow from the skin and not from warts." A 

 year or more ago, in examining the median dorsal tufts on the second and 

 third thoracic somites of the European Oastropacha quercifolia, I found 

 that they were composed of broad lanceolate oval scales, which were 

 opaque and dark steel purple in color, with the surface quite regularly 

 striated, though not invariably so. The striae do not appear to extend to 

 either end. They vary in shape and in size, some being narrow and 

 with a simple point at the distal end, while the majority are variously 

 notched or toothed, as shown in Fig. 15. They thus appear to be true 

 scales, like those on the wings of Lepidoptera, etc. 



In the same species the lateral tufts along the body contain each a few 

 long hairs with flattened ends, the latter varying in shape from oval to 

 triangular, with the ends often very broad and ragged, with from one to 

 four very irregular teeth. No striae are perceptible, and the hairs through- 

 out are pale, colorless and transparent (Fig. 16). 



* Entomolo(jLcal Correspondence of T. W. Harris, edited by S. H. Scudder, Boston, 1862, 

 PI. iii, Fig. 2. Tlie same larva lias also been figured in my Ouide to the Studi/ of In- 

 sects, Fig. 236. 



