Mr. E. Doubleday on some Lepidoptera. 121 
we here find them in the middle of the secondary deposits in 
great force and variety, forming in fact a considerable proportion 
of the whole number of univalves, and consequently existing 
long before the extinction of the Ammonites and Eelemnites. 
It is highly probable that Dr. Buckland would not now adhere 
to the above theory, stated some ten or eleven years ago; but 
having the authority of his name and occurring in a standard 
work, it still passes current with the reading public, and has 
frequently been quoted by subsequent writers. 
On a future occasion I anticipate the pleasure of presenting to 
the Club some remarks more in detail on the new or less-known 
molluscous forms which occur in this formation. The Inferior 
Oolite within the narrow limits of my observation has likewise 
yielded a considerable store of novel materials for investigation : 
these would require a separate communication. 
XIV. — Descriptions of new or imperfectly described Lepidopte- 
rous Insects. By Edward Doubleday, Esq., E.L.S., Assist- 
ant in the Zoological Department of the British Museum, &c. 
[Continued from vol. xix. p. 389.] 
Fam. PIERIDtE. 
Genus Euterpe. 
Eut. Manco. Eut. alls omnibus supra nigro-fuscis, atomis cinereis 
adspersis, anticis fasciis duabus transversis macularibus, maculisque 
marginalibiis cinereis ; posticis macularum sagittiformium serie, 
maculisque marginalibus cinereis. Exp. alar. 2 unc. vel 50 mill. 
Hah. Bolivia. 
Above : anterior wings fuscous, sprinkled with cinereous, the 
cell with a cinereous spot at the extremity; followed by two 
transverse macular bands of the same colour running nearly 
parallel to the outer margin, the inner one becoming wider and 
less defined towards the inner margin, the outer margin marked 
with a series of cinereous spots between the nervules. Posterior 
wings fuscous at the base, then thickly sprinkled wdth cinereous 
scales, so as to form a broad band across the middle of the wing 
in continuation of the first band of the anterior wings : beyond 
the cell fuscous, with a series of sagittate spots composed of 
cinereous and fuscous scales, about equally mixed, and on the 
margin itself a series of cinereous spots. Below : the anterior 
wings are grayish white, towards the apex slightly silvery ; below 
the subcostal and also the median nervure is a fuscous vitta, 
arising from the base, and at the end of the cell a fuscous spot ; 
about half-way between the cell and the outer margin is a trans- 
verse fuscous band, nearly straight internally, very angular ex- 
