220 MEilOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



two genera, and this justifies our placing it in a gonus apart from Heterocainpa, though its late 

 larval and iniaginal characters are closelj similar to those of Ileterocanii)a. 



Cocoon. — Subterranean, or si)iiininf;- a slight cocoon when in confinement. "This is a silken 

 affair, loosely constructed (judging from fragment in collection), and with earth and sand 

 iucor))orated and foiming its inedomiuatiug constituents." (Kiley IMS.) 



Fupa. — Length, about 20 mm.; rather slender; reddish brown in color, sliining; 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. ijwmca; 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 jAmits. — Elm (Harris, French, and myself), beech. 



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

 catcr])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 (Eut. Corresp., j). a02) found 

 under a sycamore and reared on sycamore leaves is evidently the young of Hcterommpa unieolor. 

 He found the caterpillar at Cambiidge, Mass., on the elm in Septendjcr and October, and observed 

 it on fences August 28 and September !», showing that the larva had then left its tbod tree. I 

 probal)ly was in error in stating in the footnote on page 2C8 of my report on l''orest Insects that 

 the figures of Harris in PI. II "represent Lochiiuvus iiianteo,^' 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 24 to 

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

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



Iiiley records the moths as occurring in Ai)ril, June, July, and August. 



Geoijraphicat distyihutioii. — Not yet known beyond the limits of the Appalachian subprovince. 

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

 Me. (E. S. Morse, ,Mus. Comp. ZooL); Boston, Mass. (Harris): Amhi'rst, .Mass. (^Irs. Fernald); 

 Platt,sburg, N. Y. (Hudson); Providence, II. I. (Packard); Cohunbus, Ohio (Tallaut); 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, JIus. 

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

 Arkansas (Palm). 



Heterocanipa (Doiibleda.v). 



(PI. XLV, lig,s. 2-4; XLVI, figs. 1-.5; XLVIF, figs, l-.'i, venation; Pl.XLVIII, fig. (>, front of head; figs. 11, 12. ))alpi.). 

 Lixlimnciis and Heterocanipa Donlileilay, Entomologist, p. 57, 1811. 

 Mhuijada Walk., Cat. Lep. Ilet. Br. Mas., v, p. 992, 18!55. 



IJelerocampa (in part), Walk., Cat. Lop. Het. Br. Mus., v, pp. 1022-I02(i, 18.5.5. 

 Ceciila Walk., Cat. Lep. Br. Mus., xxxii, p. 419, ISoS. 

 Staiiropus ? Doubleday, Harris Corresp., p. 131, 18(19. 



LoihmiienH iiiid Ileterocampa Pack., Proc. Knt. Soc. Phil., iii, pp. 368,370, 1864. 

 Lilodoiilu Harvey, Cau. Kut., viii, p. 5, .Ian., 1876. 



Grote, New Check List N. Amcr. Moths, |i. 19, 1882. 

 Smith, List Lep. Bor. Amor., ]). 31, 1891. 

 Kirliy, 8yn. Cat. Lep. Het.. i, p. .563. 1892. 

 Heterocanipa Grote, New Check List N. Amer. Moths. ]>. 19, 1882. 

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

 Kirl.y, 8yn. Cat. Lep. Hot., i, p. .563. 1892. 

 Heterocanipa and Cecrita in part, Neum. and Hyar, Trans. Amer. Kut. Soc, xxi, i)p. 204, 206; Journ. N. Y. 

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



Moth. — .5 and 9 . Head larger and more luominent tlian 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 fiat tuft, ami on the head a dense tuft of long 



