PTEROSTOMA. 259 



male ; the wings are long and rather broad, the fore-wings with 

 the hind margin denticulated, and the inner margin furnished 

 with two reversed tufts of long scales, the basal one the longest ; 

 the hind tibiae are armed with four long spurs. The larva is 

 naked without protuberances, but with a very pointed head ; 

 the pupa is subterranean. 



THE PALE PROMINENT. PTEROSTOMA PALPINUM. 



Bombyx palpina^ Clerck, Icones, pi. 9, fig. 8 (1759); Linnaeus, 



Faun. Suec. p. 305 (1761); Roemer, Gen. Ins. pi. 36, 



fig. 21 (1785); Esper, Schmett. iii. p. 315, Taf. 63, figs. 



1-4 (1786); Hiibner, Eur. Schmett iii. fig. 16 (1800); 



Godart, Lepid. France, iv. p. 203, pi. 19, figs. 3, 4 (1822). 

 Notodonta palpina t Ochsenheimer, Schmett. Eur. iii. p. 69 



(1810). 

 Ptilodontis palpina, Stephens, 111. Brit. Ent. Haust. ii. p. 28 



(1828). 

 Pterostoma palpina, Kirby, Eur. Butterflies and Moths, p. 138, 



pi. 31, fig. 2 (1880); Buckler, Larvae of Brit. Lepid. ii. 



p. 154, pi. 34, fig. i (1887); Barrett, Lepid. Brit. Isl. iii. 



p. 145, pi. in, figs, i, 1^-^(1895). 



This European species measures from 1 24 to 2 inches 

 across the wings. 



The palpi are long and prominent. The antennoe have a 

 whitish shaft with dark brown branches, and are strongly 

 pectinated in the male. The body is yellowish-grey, with a 

 divided anal tuft in the male. 



The fore-wings are broad, dentated and yellowish, varied with 

 whitish-grey, with darker sinuous streaks and yellowish dots on 

 the nervures. The hind-wings are brownish-grey in the male, 

 lighter in the female, with a yellowish zig-zag transverse band. 



The larva is slender, bluish-green, with a few paler longitudinal 



S 2 



