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XIX. Characters of undescribed Lepidoptera in the Collection 

 of W. W. Saunders, Esq., F.R.S., &;c. By Francis 

 Walker, Esq., F.L.S. 



[Read 2nd Dec. 1861.] 



Fam. SPHINGID^.. 



Genus Andriasa, Walk. 



The description of this genus is taken from the following spe- 

 cies. It is closely allied to J. contraria in general structure, but 

 is quite distinct in colour and markings. A. marginalis will form 

 a distinct genus. 



Mas. — Corpus robustum, elongatum. Caput cristatum. Pro- 

 boscis obsoleta. Palpi validi, erecti, caput non superantes ; 

 articulus 2us dense pilosus ; Sus sub-obsoletus. Antennae 

 robustas, serrataej pubescentes. Abdomen lanceolatum, alas 

 posticas longe superans. Pedes longi, setulosi, sub-pilosi ; 

 tibiae posticae calcaribus quatuor approximatis. Alee amplae, 

 longiusculse ; anticae acutae, costa recta, margine exteriore 

 convexo, 



Male. — Body stout, elongate. Head crested. Proboscis obso- 

 lete. Palpi stout, vertical, not rising higher than the head ; 2nd 

 joint densely pilose in front ; 3rd nearly obsolete. Antennae stout, 

 serrated, pubescent. Abdomen lanceolate, extending far beyond 

 the hind wings. Legs long, setulose, slightly pilose; hind-tibiae 

 with four approximate spurs, one of the apical pair long. Wings 

 ample, rather long. Fore-wings acute ; costa straight ; exterior 

 border convex, moderately oblique. 



Andriasa eruhescens. 

 Mas. — Cinereo-cervina, alis subtus linea sub-marginali nigra 

 sub-denticulata, alis anticis lineis quatuor nigricantibus, la, 

 2a, Saque postice approximatis, la undulata, 2a, .Sa, 4aque 

 obliquis sub-denticulatis, alis posticis roseo-rufis linea sub- 

 marginali nigricante indistincta. 

 Male. — Cinereous fawn-colour. Wings beneath with a black 

 slightly denticulated sub-marginal line. Fore-wings with four 

 blackish transverse lines ; 1st, 2nd and 3rd lines approximate on 

 the interior border; 1st line undulating, not oblique; 2nd, 3rd 

 and 4th oblique, slightly denticulated ; underside rosy-red towards 



