496 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



annual generations at Washington, the first larvie occurring in July and the second 

 brood in October, while the first moths from hibernated pupte 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, occidentalis, furcifera, 

 Jiasta, lobelia;, and radcliffii, while the genitalia, alone considered, would separate it 

 from innotata, with which, especially the form gra'fii, 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. 



Moth. — Average expanse of four wings 37""". General color clay-yellow or pale 

 buff, with silver-gray hues. Maculation subobsolete, except the transverse pos- 

 terior line. Form of body and wings most nearly approaching tritona, 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 6 and 7 ; the ordinary maculation much as 

 in innotata, but in faint fuliginous and sienna ; orbicular usually quite obsolete ; 

 where indicated it is by relief basally 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 grwfii, the inner angle between veins G and 7 more pronounced, but without the 

 tooth of tritona, the outer angle on vein 1 more pronounced and acute ; well relieved 

 basally 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 tegulae. Under surface uniformly pale clay yellow, with discal 

 and transverse shade on secondaries intensified, and similar shades, on i^rimaries, the 

 transverse line strongly elbowed ; borders of wings, especially of secondaries, may 

 also be dotted with brown, though usually concolorous ; anteuuije 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™™. 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 papilla}, 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 

 papillae, 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 and bordering the red top. Stigmata 

 with black annulus. 



Pupa. — Highly polished. Abdominal joints above sparsely and shallowly punctate. 

 C remaster 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 



