( cxvii ) 



so than in Euterpe. The apex is usually rather sharp, especi- 

 ally so in L. eleone, L. tovaria, L. semicaesia, L. tenuicornis 

 and L. caesia. The sides as a rule are nearly parallel ; thei'e 

 is slight lateral compression in L. eleone ; in L. aripa and 

 L. tovaria the sides convei-ge slightly towards the apex ; in 

 L. tenuicornis they diverge slightly towards the base. The 

 fimbriae are fairly long, in L. penthica they appear to be 

 unusually broad. The base is well rounded in L. erinna, 

 L. eleone, L. semicaesia and L. cinerea ; it is slightly cornuated 

 in L. tovaria, L. penthica and L. tenuicornis. The lamina of 

 L. caesia is somewhat exceptional in the genus, a little recall- 

 ing some of those in Catasticta. It is triangular, the sides 

 converging toAVards the apex, which is acute. The base is 

 prolonged into distinct cornua, which may be sharp and 

 almost claw-shaped. The disc, however, is thoroughly char- 

 acteristic of Leptophob'ia, bearing no resemblance to that of 

 the former genus. 



The group of neotropical butterflies to which Dr. Butler 

 restricts the generic name Pieris, and which is known to some^ 

 other authors as Ferr/njbris, falls apart, so far as its scent- 

 scales are concerned, into two veiy distinct sections. The first 

 of these consists of species allied to Pieris calydonia, such 

 as P. viardi, P. locusta and P. pyiotis. The second comprises 

 what may be called the P. huniae group, including P. phaloe 

 and P. sevata, as well as one or two forms at present unnamed. 

 In the former division the plume-scales are not unlike those 

 of Leptopliohia, being moderate in size, with sides more or less 

 parallel. They can, however, be at once distinguished from 

 those of LeptopJwbia by the appeai'ance of the disc, which 

 instead of being represented merely by a slight proximal swell- 

 ing of the footstalk, is a definite strnctvire generally oval or 

 circular in outline, and attaining in P. pyiotis considerable 

 relative dimensions. The sides of the lamina converge 

 slightly towards the apex in Pieris locusta and P. apicalis ; 

 in Pieris fithoreides, P. calydonia and P. demophile they show 

 a slight distal divergence. The base is rounded in P. viardi, 

 P. demophile and P. calydonia, squared or angulated in 

 P. tithoreides, P. mandela, P. marana and P. pyiotis ; P. 

 locusta and P. apicalis possess rudimentary basal coinua. [n 



