COSMOTRICHE. i55 



characters exhibited by C. potatoria in the larval stage, Bacot 

 makes many interesting observations. He says that the larva of 

 this species presents general characters that are common to many 

 widely-separated species, e.g., (i) the oblique stripes and tendency to 

 develop a hump on the 8th abdominal, (2) the fact that there are no 

 secondary hairs in the 1 st instar, although they become a marked feature 

 of the 2nd. together with the fact that their bases are surrounded by 

 black on the ground colour of the larva, but not on the yellow of 

 the oblique stripes and subdorsal bands, and (3) that there are 

 black dorsal spots in the 2nd stage. All these point unquestionably, in 

 his mind, to a relationship with Dimorpha (versicolora), and through 

 this species (or rather through its ancestral base) with the Sphingids. 

 The growth of secondary hairs, some short, and others long, 

 the general shape of the larva, the coloration and pattern of the 

 thoracic segments (cream- or white-coloured diamond-shaped spots) 

 are characters held in common with the larva of Lasiocampa 

 qtiercus (in which species diamond-shaped whitish spots form a 

 chain right down the back), the larva of var. vibumi occasionally 

 showing the same peculiarity. The characters that ally the larva of 

 C. potatoria with that of Eutricha quercifolia are too apparent to 

 need pointing out. The great development of the prothoracic 

 lateral tubercles, so like those in the larvae of the Liparids, suggest, 

 an alliance therewith, but this resemblance is most probably due to 

 convergence. 



There are but few Cosmotrichid gynandromorphs recorded 



besides those of C. potatoria described (posted). There is one of the 



allied C. albomaculata, described and figured by Wiskott (Festschr. 



Ver. Schles. Ins., 1897, p. 120, pi. iii., fig. 9), which he notes as 



follows : 



c? left, ? right. In marking, colouring, and lorm of the wings, perfectly 

 halved; wings of right side 21mm., of left 17mm. in expanse; left antenna male, 

 right female ; right legs darker than left ; body with distinct line of division, 

 left side slender and thin, right thick and bulged, posterior end with anal tuft. 

 From the Amur. — In the Wiskott collection. 



Genus : Cosmotriche, Hiibner. 

 Synonymy.— Genus : Cosmotriche, Hb., "Verz.," p. 190 ( ? 1822) ; Auriv., 

 "Iris," vii., pp. 160,161,163(1894); Dyar, "Can. Ent.," xxx., pp. 4-6 (1898) ; 

 Tutt, "Proc. Sth. London Ent. Soc," 1898, pp. 1-3 etseq. (1898) ; "Brit. Lep.,". 

 ii., p. 451 (1900); Staud., "Cat.," 3rd ed., p. 122 (1901). Phalaena (-Bombyx) , 

 Linn., "Syst. Nat.," xth ed., p. 498 (1758) ; xiithed., p. 813 (1767) ; Poda. " Ins. 

 Mus. Grae'c," p. 84 (1761); Mull., "En. Frid ," p. 40 (1764) ; ".Zool. Dan Prod.," 

 p. 117 (1776); Esp., "Schmett. Eur.," iii., p. 75 (1783); Vill., "Linn. Ent.," 

 ii.. p. 123 (1789); Bkh., "Sys. Besch.," iii., p. 97 (1790). Phalaena, Hufn., 

 "Bed. Mag.," ii., p. 398 (1766); Meyer, " Fuess. Mag.," i., p. 270 (1778). 

 Bombyx, Fab., "Sys. Ent," p. 564 (1775); "Spec. Ins./' ii., p. 176 (1781) ; 

 "Mant. Ins.," ii., p. 112 (1787); " Ent. Sys.," iii., 1, p. 425 (1793) ; [Schiff.,] 

 " Schmett. Wien.," p. 56 (1775); Esp., "Schmett. Eur.," iii., pi. xi., figs. 1-5 

 (1782); Hb., "Larv. Lep.," iii., Bomb, ii., Verae R. b. (?i8oo); "Eur. 

 Schmett.," ii., fig. 183 (?i8oo); text p. 146 ( ? 1805) ; 111., "Sys. Verz. 

 Wien," n. Ausg., 1., p. 108 (t8oi) ; Schrk., " Fauna Boica," ii., 1, 

 p. 273 (1801) ; Haw., "Lep. Brit.," 1, p. 84 (1803) ; Leach, " Edin. 

 Ency.," ix., p. 132 (1815) : Godt., "Lep. Eur.," iv., p. 92 (1822); 

 Snell., "De Vlind.," p. 183 (1867); Staud., "Rom. Mem.," vi., p. 316 (1892). 

 Lasiocampa, Schrk., " Fn. Boica," ii., 2, p. 154 (1802) ; Oken, " Lehrb. Naturg.," i., 

 p. 707 (1815) ; Bdv., "Em. Lep. Ind. Meth.," p. 48 (1829); "Icon. Chen.," pi. 

 vi., fig. 2 {circ. 1840); Dup., "Icon, des Chen.," ii., pi. v., fig. 1 (circ. 1840); 

 Staud.. "Cat.," 1st ed., p. 30 (1861); 2nd ed., p. 69 (1871) ; Berce, " Faun. 

 Franc.," ii., p. 196 (1868); Nolck., "Lep. Fn. Est.," 1, p. 129 (1868); Curd, 

 "Bull. Soc. Ent. Ital.," viii., p. 151 (1876) ; Frey, " Lep. Schw.," p. 97 (1880) ; 



