MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. Ill 



with these crawliiiir insectt*, running' about in all directions to tind food, which the trees, alroad^^ 

 denuded of foliage, no longer afforded. They are found in large numbers every year and seem 

 to prefer, if not too numerous, the smaller trees. The rather large, flat eggs of this moth are 

 deposited earl}- in July, and always in large, irregular clusters on the under side of a leaf, and 

 almost invariably' near the tip of a })ranch." 



"The 3'oung caterpillars appear toward the end of -Tuly, but somi^times nuuh later — so late. 

 in fact, that the mature ones find it difficult to obtain the necessary food among the discolored 

 autumnal leaves. The young caterpillars are gregarious and feed only at regular intervals, 

 huddling together at other times. The younger and more tender leaves near the ends of 

 l)ranches are first eaten and nothing of them remains but the midrib and stem, and in some 

 cases the leaf beneath the empty shell, ... As the caterpillars grow larger the colony 

 separates into smaller families, and when the worms reach their full size they scatter more and 

 more, forced to do so Ijy their ever increasing appetite. Before reaching their full size they 

 undergo a number of molts. Their emptj' skins are not eaten or thrown away, which is very 

 frequentl}- the case with caterpillars, but remain for a long time upon the ribs of the under side 

 of a leaf, to which the caterpillar had fastened itself very securely before undergoing a molt. 

 The skin of these caterpillai's is reinai-kalily hard and stiff', which accounts for the peculiarity of 

 leaving the empty skin behind, as if inflated. Although gregarious, they do not form a web of 

 any kind." 



PmriHites. — Limneria fugitiva Say, and a Tachina (Lugger). 



Geiix/raphicfil (lidrihition. — Island of Orleans, Province of Quebec, Canada, very rare (Han- 

 ham Bowles); Sagadahoc and Cumberland counties. Me., al)undant; Amherst, Mass., Providence, 

 11. I. (Packard); Boston, Mass. (Harris); near Albany, N. Y. (Lintner); Pennsylvania (Claypole); 

 New Jersej- ("common," Smith); St. Louis, Mo., Cedar County, Iowa (Riley); Minnesota (Lug- 

 ger); Georgia (Abbot). A memlier of the Appalachian and Austroriparian subprovinces; its 

 northern and southwestern limits can not yet be exactly defined. (See Map ^'^. ) 



^]VISOT^V RTTBICT'IN'r)^^ (FaVji-ieixis). 

 (I'l. XX, Hgs. 15, 15a, 15b.) 



Bomliijx nihicunda Fabricius, Ent. Syst., Ill (1), j). 429, n. 09. 1793. 



Dryocampa ruhicunda H.\rhis (in Hitchcock's Report on tlie Geology, etc., of Massachusetts, 4", p. 592, 18.34, 

 and 2d ed., 1835), Cat. Ins. Mass., p. 72. 1835; Treatise Inj. Insects, 3 ed., fig. 20(), p. 40S. 1862.— 

 W.\LKER, Cat. Lep. Het. Br. Mas., YI, p. 1497. 1855. — Morris, Synopsis Lep. N. Anier., ]•. 232. 1802. 



Anisola ruhicvnda Grote, Proc. Ent. Soc. Phil., p. 93. June, 1864. 



Di-i/ocampa ruhicunda Packard, Synopsis Bombycid.v U. S., II, Proc. Ent. Soc. Phil.. |i. .3S4. .Vov.. lS(j4. 



Drijocampa venusta W,\lker, Suppl. Cat. Leji. Het. Br. Mus., 2 (32), p. 574. 1865. 



Adelocephala ruhicunda Boisduval, Annales Soc. Ent. Belgique, XV, p. 88. 1872. 



Dryocampa {Anisota) ruhicunda Riley, 5tli Ann. Rep. Ins. Missouri, \). 137, fig. «, h, c. IS73. 



Dryocampa ruhicunda var. alha Grote, Bull. Buffalo Soc. Xat. Sc, II, p. 183. 1874. 



Dryocampa pallida Bowles, Can. Ent., VII, p. 108. 1875. — BEUTEXMiJLLER, Cat. bomln'cine moths N. York, 

 ' p. 440. 1898. 



Dryocampa ruhicunda Packard, otli Rep. U. S. Ent. Conim. Ins. Inj. Forest Trees, ji. .392. 1S90. — Kirisv. Syn. 

 Cat. Lep. Het., I, p. 739. 1892. 



Animla ruhicunda 1:iEVM0F.aES and Dyar, Journ. N. Y. luit. Soc, II, p. 148. Dec, 1S94. 



Anisota rulncunda var. cdha Neumoegen and Dyar, Journ. N. Y. Ent. Soc, II, j>. 148. Dec, 1894. 



"Anisota senatoria Abbot & Smith (Nat. Hist. Lepid. Ins. Ga., 1797, v. 2, p. 113, pi. 57). Harris (Rept. Ins. 

 Injur. Veg., 1841, p. 291, 292) describes the larva, pupa, and imago of this species; the larva, he states, feeds upon 

 white and red oaks [Quercus sp.]. Morris (Synop. Lepid. X. A., 1862, p. 231) describes the larva and imago. 

 Harris (Treatise on Ins. Injur. Veg., 1862, p. 405, 406) figures and describes larva, pupa, and imago, and (Entom. 

 Corre.s])., 1869, p. 298, pi. 2, tig. 9, and pi. 4, fig. 12) gives acolored figure of the larva and a lilack one of the pupa. 

 Riley [?] (.\mer. Entom., Sept. -Oct., 1869, v. 2, p. 26) states that the larva eats raspberry [Huhuf: sp.]. Lintner 

 (Entom. Contrib., No. 2, 1872, p. 51, 52) describes the early stages of the larva, which, he writes, has four molts 

 (five stages), and feeds on Qucrcus prinoides. Packard (Bull. 7, U. S. Entom. Comm., 1881, p. 45) briefly describes 

 the larva, and gives a few notes upon its haliits. The larva feeds on 'Betula alha. (Mrs. Dimmock, Psyche, IV. 



