1888.] 153 



his paper having been read at the meeting of the Society on Feb. 14th, 

 1872 ; thus Westwood's specific name has priority. It is curious that 

 Westwood had only male scales, and Signoret only those of the female ; 

 among those that I have I cannot determine any of the male. When 

 Signoret says the scale has the form of a star, which is also implied by 

 "Westwood's stellifer, reference is intended to the " star " of an Order 

 of rant and merit. Mr. Mclntire aptly says, " the scales resemble 

 tiny tents pegged down in six or seven places." 



8, Beaufort Gardens, Lewisharu : 

 October, 1888. 



ON THE VARIATION OF THE APICAL VEINS IN THE GENUS 

 CEROSTOMA, LATE., AND ITS ALLIES. 



BY THE ET. HON. LORD WALSINGHAM, M.A., E.R.S. 



In endeavouring to separate the North American species of 

 Cerostoma, Latr., according to the system adopted by Herr Pastor 

 Wallengren,* my attention has been called to the characteristics of 

 the four generaf into which the author divides the species included in 

 Staudinger's and Wocke's Catalogue under the single name Cerostoma, 

 Latr. The distinctions upon which these genera are founded have 

 reference first to the outline of the wing ; secondly, to the neuration ; 

 and thirdly, to the presence or absence of ocelli. The tufts of raised 

 scales on the wings of three species are also especially noticed. 



The falcate apex of the fore- wing in C. falcella-, C. nemorella, and 

 C. xylostella, which species he places in his new genus Periclymenooius 

 is of itself a strong and perhaps sufficient character to be regarded as 

 of generic value. 



The raised scales on the fore-wings of C asperella, C. horridella, 

 and C. scabrella, which are placed in the genus Trachoma, are not 

 found in his three allied genera ; but when we come to the groups of 

 species, placed respectively in Cerostoma, Latr., and Credemnon, Wlgrn., 

 the differences on which Wallengren relies for separating them do not 

 appear to justify this further sub-division. 



Apart from the question of the presence or absence of ocelli, the 

 only distinction to which he appears to attach importance is the length 

 of the fascicule, or tuft of scales, projecting from the second joint of 

 the palpi, which in Cerostoma is " shorter than, or only equal to, the 



* Skandmaviens arter af Tineidgruppen Plutellidce Staint— Ent. Tidsk., i, 53—63 (1880). 

 t Cerostoma, Latr., Credemnon, Wlgrn., Periclymenobius, Wlgrn., and Trachoma, Wlgrn. 



