220 MEMOIKS OF TUE NATIOIS^AL ACADEMY OF SCIENCES. 



two genera, and this justifies onr placing it in a genus apart from Heterocaiupa, though its late 

 larval and imaginal characters are closelj similar to those of Heterocam2)a. 



Cocoon. — Subterranean, or spinning a slight co(;oon when in conflnement. "This is a silken 

 aS'air, loosely constructed (judging from fragment in collection), and with earth and sand 

 incorporated and forming its ])redominating constituents." (Kiley MS.) 



rupa. — Length, about I'O 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 

 aS'. ipomecv, 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." (Eiley MS.) 



Food plants. — Elm (Harris, French, and myself), beech. 



Habits. — This insect was known by Dr. Harris to inhabit the elm as early as 1837. The 

 cateri)illar is found from August until October. Professor French has also described the larva 

 found on the elm. (Can. Ent., xviii, p. lit.) The larva which Harris (Ent. Corresp., \^. 302) found 

 under a sycamore and reared on sy( amore leaves is evidently the young of Heterocampa uiiicolor. 

 He found the caterpillar at C'ambiidge, Mass., on the elm in Se])tember and October, and observed 

 it on fences August 28 and September 9, showing that the larva had then left its food tree. I 

 jjrobably was in error in stating in the footnote on page 208 of my rejiort on Forest Insects that 

 the figures of Harris in PI. II "represent Lochnucus vianteo,^' as the latter species is not known 

 to feed upon the elm. 



Professor French's excellent description was based on thirteen individuals, all taken on a 

 young elm tree at Carbondale, 111., September 20. " By October 5 all but one had disappeared 

 for the purpose of pupation, going beneath the surface of the dirt in the breeding cage. Nine 

 imagines were produced the following spring, the times of emergence ranging from May 21 to 

 June 7. There seem to be two broods in a season, for larv;^ were found on elms during the early 

 part of summer, but these were not reared to find out the period of the summer brood." 



Eiley records the moths as occurring in April, June. July, and August. 



6eo{jraphical distribution. — Not j-et known beyond the limits of the Appalachian subprovince. 

 Francouia, N. H. (Mrs. Slosson); Orono, Me. (Mrs. Fernald); Bath, Me. (Packard); Portland, 

 Me. (E. S. Morse, Mus. Comp. Zool.); Boston, Mass. (Harris); Amherst, Mass. (Mrs. Fernald); 

 Plattsburg, N. Y. (Hudson); Providence, 11. 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, Kans. (F. H. Snow, Mus. 

 Comp. Zool.); Manhattan, Kans. (Popenoe); Chicago, 111. (Westcott); Fort Collins, Colo. (Baker); 

 Arkansas (Palm). 



Heterocampa (Doubleday). 



(PI. XLV, figs. 2-4; XLVI, figs. 1-5: XLVII, ligs. 1-3, venation; Pl.XLVIII, tig. 6, front of head; figs. 11, 12, palpi.). 

 Lochmaeus ami Heterocampa Doubleday, Entomologist, p. 57, 1811. 

 Mhogada Walk., Cat. Lep. Het. Br. Mus., v, p. 992. 1855. 

 Heterocampa (in part), Walk., Cat. Lep. Het. Br. Mus., v, pp. 1022-1026, 1855. 

 Cecrita Walk., Cat. Lep. Br. Mus., xxxii, p. 449, 1855. 

 Staiiropus f Doubleday, Harris Corresp., p. 134, 1869. 



Lochmaeus and Heterocampa Pack., Proc. Ent. Soc. Phil., iii, pp. 368, 370, 1864. 

 Litodottta H.arvey, Can. Ent., viii, p. 5, Jan., 1876. 



Grote, New Cheek List N. Amer. Moths, p. 19, 1882. 

 .Smith, List Lep. Bor. Amer., p. 31, 1891. 

 Kirby, Syn. Cat. Lep. Het.. i, p. 563, 1892. 

 Heterocampa Grote, New Check List X. Amer. Moths, p. 19, 1882. 

 Smith, List Lep. Bor. Amer., yt. 31, 1891. 

 Kirby, 8yu. Cat. Lep. Het., i, p. .563, 1892. 

 Heterocampa and Cecrita in part, Neum. and Dyar, Trans. Amer. Ent. Soc, xxi, pp. 204, 206; Journ, N. Y, 

 Ent. Soc, ii, p. 117, Sept., 1894. 



Moth. — $ and 9 . Head larger and more prominent than in any of the foregoing genera, but 

 smaller than in Cerura; vertex triangular; front rather narrow, subtriangular, narrowing below. 

 Eyes naked; on each side of the eyes a long broad flat tuft, and on the head a dense tuft of long 



