( 427 ) 



gradually shading off distally, this brown scaling forming a band which narrows 

 costad. Fifth abdominal tergite often with a distinct grey shade ; tliis grey scaling 

 does not rejiresont a rudiment of the white belt of Sesia tantalus, etc., which is 

 sitnated upon the fourth tergite ; basal sternites also often distinctly paler than 

 the more distal segments. 



c?. Tenth segment similar to that of yn'>:ea (PI. XLII. f 12) ; tergite ending 

 in a short, blunt tooth ; it is apically not dilated externo-laterad as in jamaicensis 

 (compare PI. XLII. f. 13). Harpe as m jamaicensis (PI. XLVII. f. 6); clasper 

 much narrower. Penis-sheath as m jamaicensis, the number of tubercles individnally 

 variable. 



?. Vaginal orifice free, postmedian, slightly asymmetrical in position, its edges 

 a little raised ; vaginal plate triangular, somewhat folded transversely. 



Hab. Mexico to Argentina ; West Indies. 



Key to the varieties : 



a. Hindwing below with the abdominal 



area more or less extended yellow . . . b. 

 Hindwing below with the abdominal 



area not yellow . . . . . . c. 



b. Black submarginal line of forewing 



above evenly curved . . . a'. P. lusca f. lusca 



Black submarginal line of forewing 



above irregular behind . . . c'. P. lusca f. ilus. 



c. Forewing 25 mm. long or less, strongly 



rounded convex in middle . . b'. P. lusca f. passerina. 

 Forewing longer, less convex in middle . . d. 



d. Yellow band of hindwing reaching to 



M- . . . . . . . d' . P. lusca f interrupta. 



Yellow band of hindwing reduced . e'. P. lusca f. restituta. 

 Yellow band of hindwing obliterated /'. P. lusca f. ienchrosa. 



It is possible that the last three forms are one sjsecies, and the other three 

 another. 



a'. P. lusca f. lusca. 



fijjlii?u lusca Fabricius, l.c. 



Perigiinia lusca Grote & Rob., l.c. ; Gundl., l.c. 



d ? . Submarginal line of forewing evenly curved, not strongly angulate as in 

 the other forms ; scaling very pale at straight j)roximal edge of antemedian band, 

 disc outside this band also pale. — —Hindwing with yellow anal patch. 



A small form, with which h'fehruci may be specifically identical. 



U(ih. ( 'uba. 



In the Tring Museum 2 i i. 



V . P. lusca f. ])asserina. 



*Ptn'jwiiajMKsenHa Boisjuval, Spec. Gen. Lip. llil. i. p. .327. n. 12 (187,5) (b:ib. ?). 

 I'lichyijimia lusca, Burnieister, Descr. Rip. Argent, v. p. 36G (1878) (Bolivia ; Bueuos Ayres) ; id., 

 I.e., Atla» p. 2'J. t. 10. f. 7 (1879). 



(? ? . Mostly small, like the jireceding. Forewing obtusely angulated in 



middle, submarginal line very irregular between W and 8M'", not very distinct 

 IKJBteriorly, being more or less merged together with the black marginal scaling ; 



