COSMOTRICHE POTATORIA. 159 



(1859); Stand., "Cat.," 1st ed., p. 30 (1861) ; 2nd ed., p. 69 (1871) ; 3rd ed., p. 

 122 (1901); Ramb., "Cat. Lep. And.,'' p. 348 (1866); Snell., " De Vlind.," p. 

 183 (1867); Xolck., "Lep. Fn. Estl.," i., p. 129 (1867;; Berce, "Faun. Franc./' 

 ii., p. 196 (18&8); Newm., "Brit. Moths," p. 45 (1869); Wallgrn., " Skand. 

 Het.," ii., pp. 105—106 (1869); Bang-Haas, "Nat. Tids.," (3), ix., p. 411 (1874) ; 

 Curd, "Bull. Soc.Ent. ItaL," viii., p. 151 (1876,; Oberth., "Etudes," v., p. 38 (1880); 

 Frev, "Lep. Schweiz," p. 97 (1880); Kirov, " Eur. Butts, and Moths,'' p. 129 (1880); 

 "Cat.," p. 826 (1892); "Handbook," iv., p. 115 (1897;; Lampa, " Ent. Tids.," 

 vi., p. 42 (1885); Jordan, " Schraett. N.-W. Deutsch.," p. 96 (1886); Auriv., 

 "Xord. Fjar.," p. 64 (1889); "Iris," vii., p. 163 (1894} ; Buckl., "Larvce, &c," iii., 

 p. 60 (1889); Ruhl, "Soc.Ent.," v., p. 128 (1891) ; Carad., "Iris," viii., p. 93 

 (1895) ; Mevr., " Handbk.," p. 323 (1895) > Barr -> " Brit - Lep.," iii., p. 37, pi. xciv 

 (1896; ; Tutt, " Brit. Moths," p. 60 (1896) ; " Proc. Sth. Lond, Ent. Soc," 1898, 

 pp. I et seq. (1898); Dyar, " Can. Ent.," xxx., p. 6 (1898); Grote, " Illus. Zeits. t'iir 

 Ent.," hi., p. 71(1898); Reutti, "Lep.Bad.," 2nd ed., p. 58 (1898). Potatorius, 

 Schrk., "Faun. Boica," ii., Abth. 1, p. 273 (1801) ; Haw., "Lep. Brit.," pt. 1, 

 p. 84 (1803;. 



Original description. — Potatoria. P. Bombyx elinguis, alis 

 reversis flavis : striga fulva repanda punctis duobus albis. Goed., 

 Ins., i.j t. 12; List., Goed., f. 82; Rai, Ins., 142, 0.3; Alb., Ins., 

 t. 17; Merian, Pur., 2, p. 27, t. 16; Roes., Ins., 1, phal. 2, t. 2; 

 Wilk., Pap., 27, t. 3. b. 2. Habitat in Gramme Europae australioris. 

 Larva caudata, cristata, pilosa, lateribus albo maculatis (Linne, 

 Syst. Naturae, xth ed., p. 498). To this Linne further adds : " Alse 

 striga anteriore ferruginea, obliqua ; posteriore repanda. Puncta 

 2 alba approximata: altero minore" (Sys. Nat., xiith ed., pp. 813 



—814). 



Sexual dimorphism. — There is a very -marked distinction 

 between the sexes of this species ; the males being smaller, usually 

 more deeply coloured; the abdomen of the female is also particularly 

 heavy when filled with eggs. The antennae of the male are strongly 

 pectinated, those of the female almost simple. Chapman describes 

 them as : $ . Antennae 1 3mm. long, about 60 joints, carrying long 

 plumules (about 27mm. long at middle of antenna); these droop 

 down so that those of either side are nearly parallel, as in all the 

 Lachneid section ; the dorsum is scaled, the dorsa of the plumules 

 are bare, their inner surface clothed with long hairs, placed so as 

 to form about 80 transverse rows of 8 or 10 in a row, the outer 

 ones meeting those of the next plumule ; each plumule terminates 

 in a bulbous extremity, carrying one large conical bristle and three 

 or more smaller ones ; these vary in different portions of the antenna; 

 on one side of the antenna the bulbs are shorter and rounder, and 

 carry shorter and thicker spikes than on the other. 2 ■ The antenna is 

 shorter than that of the 3 , being only 10mm. in length, and consists of 

 about 55 joints; it has a similar irregularly-scaled dorsum, and two 

 plumules to each segment; the plumules are only about o^mm. long, 

 faintly clubbed, and each carries one thick and one slender terminal spike 

 of much the same size and aspect as in the 3 ; the basal half carries, 

 perhaps, a score of hairs, similar to those of the $ , but rather 

 more slender and weak ; the terminal half has only very minute, 

 straight, appressed bristles. 



Gvnandromorphism. — It would appear to be quite evident that 

 many of the gynandromorphous specimens mentioned by Schultz 

 {Illus. Wochensch. fur Ent., 1., p. 383; ii., p. 414) are mere colour 

 aberrations, in which the normal brownish tint of the male is more 

 or less developed in the ? , or the ordinary yellow colour of the 



