52 L10PTILUS. 



cinereous shading of their cilia about the anal angle, 

 also in the pale cinereous hind wings and cilia, and 

 in the darker colour of the underside. 



Having examined most carefully a considerable 

 series of the first variety, which seems to be the most 

 usual form, I am inclined to think that the two 

 above described belong to the same species. They 

 differ from the description of Pterophorus ncevosi- 

 dactylus, Fitch (Nox. Ins. N. Y. Rep. 1 & 2, p. 143), 

 in the absence of a " dot halfway between the cleft 

 and the base," and of a " tawny brown spot on the 

 outer margin near the tip," as well as in their paler 

 fringes and larger size. 



Mr. Walker's typical specimen of this species in 

 the British Museum is not in good condition ; the 

 thinly scattered brownish scales are apparently dis- 

 placed by friction, and the brown spot before the 

 fissure is so nearly obliterated as to have escaped the 

 observation of Mr. Walker in describing the species. 

 The specimen belongs rather to the second of the 

 two varieties described above, having the head slightly 

 marked with brownish towards the thorax, the hind 

 wings very pale cinereous, and the underside rather 

 brownish white. 



Prof. Zeller remarks upon a specimen of var. a 

 which I sent to him : " Only larger, otherwise 

 agreeing with Lioptilns holo1eucos> Z. (Verb. z.-b. 



