126 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



following. The youug at first keep together aud as they grow larger 

 disperse. 



The following quotations are from Riley's unpublished notes : 



"Found feeding on oak and hazel at St. Louis, Mo., by Professor Riley, 

 on hazel in Illinois, by Mr. Muhlemann, aud on both oak and hazel by 

 Mr. Saunders, London, Out. Moths issue from middle of May to mid- 

 dle of June. Eggs were noticed to hatch July 10. Went through the 

 first two molts till July 20, and through third molt July 27. The first 

 larva entered the ground August 4, and the last one August 22, 1870. 

 These are specimens from Canada, but around Kirkwood, Mo., there 

 are some found which are not yet full grown at this date. 



" Mr. Saunders says, November 21, 1870, that he has noticed a sec- 

 ond brood. 



'•According to Abbot and Smith this is the more spotted moth, and 

 their larva agrees with miue, but is colored too yellow. Their larva 

 of pellucida seems to differ principally in having two pink longitudinal 

 vittfe, each side. The male and female of A. stigma are almost alike, 

 whilst in A. pellucida they are unlike. Both are sometimes ^"^and on the 

 same tree. 



''Dr. Asa Fitch states that his little daughter was stuji^, badly by a 

 larva which he had feeding under a glass; but, notwithstanding that 

 a slight stinging sensation is discernible, it can not be Lkened to that 

 of the true stinging larvte and is not more irritating than the prickly 

 spines of Vanessa interrogationis. 



"Young larva. — August 24, 1876, found a lot of caterpillars feeding on Qiiercus 

 Mcolor? They are .63 of an inch in length, and of a dark greenish-gray color, with a 

 broad dorsal line a shade darker; on each segment there are six black thorns tipped 

 with white ; two on the dorsal line, one on each side, and one on the margin of each 

 side ; those on the sides are very small and more like tubercles ; thorns on the back 

 and sides nearly equal in length, getting a little longer on the last segments ; on the 

 second segment are two very long horns, resembling very much antennae, the point 

 of which is divided into two; they are directed forwards and curved a little back- 

 wards. Head, brick-red, not very glossy ; feet black. Destroyed by parasites. 



" Full grown larva. — Average length, 50™"'. General color pale tawny-red, inclining 

 to oi-ange. The whole surface covered with bright yellow, almost white papillBB of 

 different sizes, giving a speckled appearance; the usual medio-dorsal narrow line ; a 

 broad subdorsal longitudinal stripe of a paler color and having a dingy carneous hue ; 

 a narrower substigmatal stripe of the same hue. Horns and spines black and marked 

 with white papilhe, and with a tendency to branch, especially towards the tijis ; the 

 longer horns on joint 2 being blunt-pointed, aud also with white papilhe at the 

 base. Head uniformly gamboge-yellow ; cervical shield, anal plate, and plates on 

 anal prolegs of the same yellowish color as head. A pale medio- veutral line; the 

 thoracic legs pale, the prolegs with pale papilhe outside on a dark ground. 



" The species is at once distinguished from the other species of the genus by the 

 longer spines, their tendency to furcation and being speckled with white papillne, 

 and by the less distinct striping." (Riley's unpublished notes.) 



Moth. — This is closely allied to A. senatoria, but in both sexes the wings are rather 

 darker and more spotted with blackish ; the cross-line on the hind wings is heavier 

 and more distinct, and the white discal spot is apt to be less perfectly round than in 

 senatoria. Expanse of wings, male, 45inra . female, 53 to 55™™. 



