496 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
annual generations at Washington, the first larva- occurring in July and the second 
brood in October, while the first moths from hibernated popes appear in April and 
the second brood in August. 
The species, both in the characters of Its larva and of the male genitalia, shows 
affinities with that group of the genus which includes morula, occidc>itali*,/ttrciftr<i, 
aorta, lobelia, and radvUjfii, while the genitalia, alone considered, would separate it 
from iunolata, with which, especially the form gra Jii. it otherwise shows the closest 
relationship. My studies of the genitalia of the genus have, however, so far led to 
no definite conclusions as to their real value in classification. 
.)/«»//<.— A vi'i age expanse of four wings I*?""". General color clay-yellow or pale 
buff, with silver-gray hues. Maeulatiou suhohsolete, except the transverse pos- 
terior line. Form of body aud wings most nearly approaching tritotta, i. e., pri- 
maries short, broad, and with apex rectangular. None of the ordinary longitudinal 
marks at base or between veins 1 and 2 or G and 7 ; the ordinary maeulatiou much as 
in innotata, but in faint fuliginous aud sienna; orbicular usually quite obsolete; 
where indicated it is by relief nasally of the transverse anterior paler line and pos- 
teriorly by the paler space between it and the reniform, which is more plainly indi- 
cated, especially on the basal side, by a sienna border. Transverse posterior line as 
in yrafii, the inner angle between veins 6 aud 7 more pronounced, but without the 
tooth of tritona, the outer angle on vein 1 more pronounced and acute ; well relieved 
nasally by silver-gray and posteriorly by a sienna-brown line and coincident subter- 
minal shade. Posterior border usually shows a distinct pale line, the fringes being 
either of the general hue or darker, with paler interruptions on the veins. Second- 
aries well rounded, clay yellow, with very faint discal and transverse fuliginous 
shade. Head and thorax concolorous with primaries except a slender brown streak 
on outside border of teguhe. Under surface uniformly pale clay yellow, with discal 
aud transverse shade on secondaries intensified, and similar shades on primaries, the 
transverse line strongly olbowed ; borders of wings, especially of secondaries, may 
also be dotted with brown, though usually concolorous ; antenna beneath, front 
tarsi, and a patch on outside of palpi dark brown. 
Male usually more strongly marked than female. Claspers of male consisting of a 
long curved hook with a broad excavate main shank and an inferior broad tooth or 
projection having parallel sides. 
Described from nine males and four females reared from larvae feeding on Betula 
nigra. 
Larva. — Average length when full grown, 38 mm . Color greenish gray before last 
molt, with a whitish medio-dorsal, and an undulating sulphur-yellow subdorsal line, 
more or less distinct. After last molt vinous brown without the dorsal lines. 
Sparsely covered (head and legs included) with short white or gray hairs arising 
from pale papillae, and thickest at sides and subventrally, so as to give a somewhat 
gastropachiform aspect. The general surface of the body, which appears smooth to 
the naked eye, is thickly and evenly beset with minute black points. Ordinary 
piliferous spots papillose and pale except on dorsum, where they are black with pale 
papilla?, usually three papillae to each spot, except on thoracic joints, where there 
are more. Head rather small, the tops of lobes reddish brown, the face pale yellow- 
ish, with distinct black mottlings on the cheeks aud bordering the red top. Stigmata 
with black anuulus. 
rupa. — Highly polished. Abdominal joints above sparsely aud shallowly punctate. 
Cremaster consisting of a small series of converging ridges dorsally, and ending in 
some six or more short, almost straight spines in a horizontal row. 
39. Charadra propinquilinea Grote. 
The caterpillar of this moth has been reared by Mr. Goodell. It feeds 
on the white birch, living in a sort of case made by folding a leaf or 
drawing two leaves together and attaching them by their edges with 
