Mr. E. Doubleday on some Lepiduptera. 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 Beleinnites. 



It is highly probable that Dr. Bucldand 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. — Desertions of new or imperfectly described Lepidopte- 

 rous Insects. By Edward Doubleday, Esq., F.L.S., Assist- 

 ant in the Zoological Department of the British Museum, &c. 



[Continued from vol. xix. p. 389] 



Fam. PIERID^E. 

 Genus Euterpe. 

 Eut. Manco. Eut. alis omnibus supra nigro-fuscis, atomis cinereis 

 adspersis, anticis fasciis duabus transversis macularibus, maculisque 

 marginalibus cinereis ; posticis macularum sagittiformium serie, 

 maculisque marginalibus cinereis. Exp. alar. 2 unc. vel 50 mill. 

 Hab. 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 with cinereous 

 scales, so as to form a broad band across the middle of the whig 

 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 7 

 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- 



