LEPIDOPTERA HETEROCERA. 303 



superans. Fcem. — Antennae subpubescentes. Abdomen crassum, 

 alas posticas dimidio superans. 



Apocheima, Herr.-Sch. Eur. Schm. iii. 98. Guen. Phal. i. 203. 



Body short, very robust. Head very pilose ; vertex prominent. 

 Palpi straight, with incumbent hairs. Thorax lanuginous, very 

 broad. Legs short, woolly ; hind tibiae with a single pair of spurs. 

 Wings entire, straight, lanceolate, very oblong. Fore wings acute; 

 costa slightly concave ; exterior border convex. Male. — Antennae 

 plumose on one side to the tips. Abdomen very short, very conical, 

 not extending beyond the hind wings. Female. — Antennas slightly 

 pubescent. Abdomen thick, extending for half its length beyond 

 the hind wings. 



1. Apocheima flabellaria. 



Cinerea ; alee punctis marginalibus nigris ; antic® lineis quatuor 

 obliquis subangulatis nigricantibus ; posticce lineis duabus ni- 

 gricantibus. 



Nyssia flabellaria, Heeger, Deutsch. Ins. 163, 44, pi. 11. Lucas^ 



Expl. Alg. 

 Apocheima flabellaria, Herr.-Sch. Eur. Schm. iii. 98, 268, f. 8 — 10. 



Guen. Phal. i. 203, 308. 



Sicily. Algeria. Constantinople. 



Genus 7. BISTON. 



Corpus crassum. Frons hirsuta, unicolor, dense pilosa. Pro- 

 boscis et palpi obsoleti. Thorax dense lanuginosus. Pedes graciles, 

 pilosi, subfiliformes ; calcaria brevia, pilosa. Alse integral, rugoso- 

 nebulosae, apice rotundatae, lineis angulatis ; anticse costa recta, 

 margine exteriore convexo. Mas. — Antennae plumosae. Abdo- 

 men breve, conicum. Fcem. — Antennae simplices. Abdomen sat 

 longum. 



Biston, Leach, Edin. Encycl. ix. 134 ; Steph. ; Herr.-Sch. ; Led. ; 



Guen. Phal. i. 204. 

 Lycia, p., Hubn. Verz. Schm. 319. 

 Amphidasys, p , Treit. Dup. Boisd. 



Body thick. Front hirsute, thickly clothed, of one colour. Pro- 

 boscis and palpi obsolete. Thorax thickly lanuginose. Legs slen- 

 der, pilose; tibiae and tarsi almost filiform ; spurs two, short, pilose, 



d2 



