126 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
following. The young at first keep together and 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The following quotations are from Riley's unpublished notes: 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, 
OD hazel in Illinois, by Mr. Muhlemann, and 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, aud the last one August 22, 1870. 
These are specimens from Canada, but around Kirk wood, 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. 
M According to Abbot and Smith this is the more spotted moth, and 
their larva agrees with mine, but is colored too yellow. Their larva 
of pellucida seems to differ principally in having two pink longitudinal 
vittae, each side. The male and female of A. stigma are almost alike, 
whilst in A. pellucida they are unlike. Both are sometimes found on the 
same tree. 
11 Dr. Asa Fitch states that his little daughter was stung badly by a 
larva which he had feeding uuder a glass; but, notwithstanding that 
a slight stinging sensation is discernible, it can not be likened to that 
of the true stinging larvae and is not more irritating than the prickly 
spines of Vanessa interrogationis. 
11 Young larva. — August 24, 1876, found a lot of caterpillars feeding on Quercus 
bicolor? 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 segmeuts ; 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. 
11 Full grown larva. — Average length, 50 mm . General color pale tawny-red, inclining 
to orauge. The whole surface covered with bright yellow, almost white papillae of 
different sizes, giving a speckled appearauce ; the usual medio-dorsal narrow line ; a 
broad subdorsal longitudinal stripe of a paler color and having a dingy carueoushue ; 
a narrower substigmatal stripe of the same hue. Horns and spines black and marked 
with white papilhe, and with a tendeucy to brauch, especially towards the tips; 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- ventral line ; the 
thoracic legs pale, the prolegs with pale papilhe outside ou 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 papilhe, 
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, malt-, 45 mm ; female, 53 to 55 mra . 
