ORANGE SWIFT. 
ITypialus Sylvinus. 
PLATE XIV. Fig. 1. 
Curtis^ iv. PI. 185. — Ph. Noc. Sylvina, lAnn. — Hop. Cmx. 
Fubr. — Hep. litipulinus, Orange or Evening Swift, 
Harris' Aurd. 
The group to which the above named species be- 
longs, distinguished by a tenn which Aristotle 
applied to some nocturnal insect*, may not impro- 
perly be regarded as a connecting linlc between tlie 
Sphingida) and moths properly so called. In the 
structure of the mouth, and of several other parts, 
they bear considerable resemblance to some of the 
preceding genera, and the manners and economy of 
the caterpillar are analogous to those of the Aigerim 
and ZygeensB ; while, on the other hand, the perfect 
insects do not differ materially in their habits from 
the tribes with which they are associated. About 
half a dozen distinct kinds inhabit Britain, of which 
the best knomi is that termed the Ghost-moth 
(H. Humuli). The male of this species is of a 
* rov Ttro/itvost Hist, Anilii, lib. 8, 
cap, *27. 
