22 Dr. A. G. Butler on the Butter/lies of 



cepting that the borders show a greyish shade answering to 

 those of the upper surface " loco fusci coloris tantum cine- 

 rascentes ad marginem." The description is much more 

 likely to be intended for Udaina cynis, only the under surface 

 of the primaries in the latter species is almost too strongly 

 coloured and the dentated character of the border still obtains 

 on the upper surface. The type being lost, it is by far the 

 best plan to let the name lapse unless something perfectly 

 answering to the description can be found. Possibly Mylothris 

 phaola or an allied form may be intended. 



Section 4. 



16. Pieris j sp. n. ? 



Four specimens of a species allied to P. sevata, but with 

 more produced costa and more broadly bordered outer margin 

 to primaries ; the apex of primaries and the secondaries below 

 sericeous pink. 



Four males, Panama. B. M. 



I have been unable to find a description of this species, 

 which, however, I prefer to leave for the consideration of the 

 authors of the * Biologia Centrali-Americana.' It vaguely 

 resembles Glutophrissa castalia t but differs in structure and 

 in the colouring of the under suiface; the primaries with 

 much straighter outer margin, all the wings with streaks of 

 thickened scales bordering the veins, and the anal segment, 

 with no trace of the dense prominent brush projecting from 

 the base of the clasps (the presence of the brush in both 

 sexes being the chief character upon which I founded the 

 genus Glutophrissa}) a feature wholly wanting in either sex 

 of Pieris. 



17. Pieris sevata. 



Pieris sevata, Felder, Wien. ent. MoDatschr. v, p. 81 (1861). 



Male and female, Venezuela. B. M. 

 Bears a curious resemblance to some of the extreme types 

 of P. pyranthe. 



18. Pieris ausia. 



Pieris ausia, Boisduval, Sp. Gen. L6p. i. p. 531 (1836). 



One male, Mexico : B. M. Two females, without locality : 

 coll. Hewitson. 



There are four males in the Hewitson collection from 

 Bolivia which must, 1 think, represent a variety of this 



