220 
MEMOIRS OF THE NATI0:N^AL ACxVDEMY OF SCIENCES. 
two genera, and this justifies our placing it in a genus apart from Heterocampa, tliough its late 
larva! and iinaginal characters are closely similar to those of Heterocampa. 
Cocoon. — Suhterranean, or spinning a slight cocoon when in confinement, “This is a silken 
affair, loosely constructed (judging from fragment in collection), and with earth and sand 
incorporated and forming its ])redoniiuating constituents.” (lliley IVIS.) 
Pwpa. — Length, about 20 mm.; rather slender; reddish brown in color, shining; punctuation 
fine and not dense; dorsal teeth at suture between meso- and metathorax 10 in number, not large, 
nearly twice as wide as long, central one largest. Tip of abdomen with two strong spurs as in 
S. iiwmecv, bifurcate at tip, the inner branches approximating so as nearly to inclose a somewhat 
oval space. Spurs more or less tuberculate. 
“Described from two pupal shells evidently of undersized individuals.” (Riley MS.) 
Food ]}lonts . — Elm (Han-is, French, and myself), beech. 
Habits. — This insect was known by Dr. Harris to inhabit the elm as early as 1837. The 
caterpillar is found from August luitil October. Professor French has also described the larva 
found on tlie elm. (Can. Ent., xviii, p. 49.) The larva which Harris (Eut. Corresp., p. 302) found 
under a sycamore and reared on sycamore leaves is evidently the young of llcterocam;pa tinicolor. 
He found the caterpillar at Cambiidge, Mass., on the elm in September and October, and observed 
it on fences August 28 and Se])tember 1), showing that the larva had then left its food tree. I 
probably was in error in stating in the footnote on page 2()S of my report on Forest Insects that 
the figures of Harris in PI. II “represent Lochmcens as the latter sj)ecies is not known 
to feed upon the elm. 
Professor French’s excellent descriihiou was based on thirteen individuals, all taken on a 
young elm tree at Carbondale, 111., September 29. “By October 5 all but one had disappeared 
for the purpose of pupation, going beneath the surface of the dirt in the breeding cage. Kine 
imagines were produced the following spring, the times of emergence ranging from May 24 to 
June 7. There seem to be two broods in a season, for larvm were found on elms during the early 
part of summer, but these were not reared to find out the period of the summer brood.” 
Riley records the moths as occurring in April, Juno, July, and August. 
Geofjraiyliical distribution. — Not yet known beyond the limits of the Appalachian subprovince. 
Franconia, N. H. (ilrs. Slosson); Orouo, Me. (Mrs. Fernald); Bath, Me. (Packard); Portland, 
Me. (E, S. Morse, Mus. Comp. Zook); Boston, Mass. (Harris); Amherst, Mass. (Mrs. Fernald);. 
Plattsburg, N. Y. (Hudson); Providence, E. I. (Packard); Columbus, Ohio (Tallant); Maine, 
Massachusetts, New Hampshire, Carbondale and Champaign, 111. (French); New York, District 
of Columbia, Missouri, Arkansas, Texas (U. S. Nat. Mus.); Lawrence, Ivans. (F. H. Snow, Mus. 
Comp. Zook); Manhattan, Ivans. (Popenoe); Chicago, Ilk (Westcott) ; Fort Collins, Colo. (Baker);; 
Arkansas (Palm). 
Heterocampa (Doubleday). 
(PI. XLV, figs. 2-4; XLYI, figs. 1-5; XLA^II, figs. 1-3, venation; Pl.XLYJII, fig- 6, front of bead; figs. 11, 12, palpi. )» 
Lorhmaena and Heterocampa Doubleday, Entomologist, p. 57, 1841. 
Alhogada Walk., Cat. Lep. Het. Br. Mu.s., v, j). 992, 1855. 
Heterocampa (in part)* Walk., Cat. Lep. Hot. Br. Mus., v, pp. 1022-1026,1855. 
Ceeriia AYalk., Cat. Lop. Bi*. Mus., xxxii, p. 449, 1855. 
Siaiiropns f Doubleday, Hams Corresp., p, 134, 1869. 
Lochmaens and Heterocampa Pack., Proc. Eut, 8oc. Phil., iii, iip- 368, 370, 1864. 
Litodonia Harvey, Can. Eut., viii, p. 5, Jan., 1876. 
Grote, New Cheek List N. Amer. Moths, p. 19, 1882. 
Smith, List Lep. Bor. Amer., p. 31, 1801. 
Kirby, Syn. Cat. Lep. Het., i, p. 563, 1892. 
Heterocampa Grote, New Check List N. Amer. Moths, p. 19, 1882. 
Smith, List Lep. Bor. Amer., p. 31, 1891. 
Kirby, Syu. Cat. Lep. Het., i, p. 563, 1892. 
Heterocampa and Cecrita in part, Neum. and Dyar, Trans. Amer. Eut. Soc., xxi, pp. 204, 206; Journ. N. Y.. 
Ent. Soc., ii, p. 117, Sept., 1894. 
Moth . — S and 9 . Head larger and more prominent than in any of the foregoing genera, hut 
smaller than in Cerura; vertex triangular; front rather narrow, siibtriangular, narrowing below. 
Eyes naked; on each side of the eyes a long broad flat tuft, and on the head a dense tuft of long 
