12 Dr. F. A. Dixey on 



inner or posterior side of the median vein proximally to 

 the origin of the first median branch ; in P. janeta the area 

 indicated is free from scent-scales {see Proc. Ent. Soc. Lond., 

 loc. cit., where " submedian " should be read for " internal "). 

 P. janeta may perhaps be a subspecies of P. sincera, 

 described by Weymer (Reiss und Stubel, Reisen in Sud.- 

 Amerika, 1890, p. 123; Taf. Ill, fig. 19), from a male 

 specimen captured on the sea-level at Guayaquil, Ecuador. 

 But it differs in several particulars from Weymer's figure 

 and description. 



6. Pieris howarthi, sp. n. (Plate II, figs. 7-10.) 



(^. Exp. al. 58 mm. Upperside dull white very slightly tinged 

 with green. Fore -wing with pale fuscous spots on the apex and 

 along the hind-margin, at the extremities of the branches of the 

 subcostal (except the first), of the two radials and of the branches 

 of the median ; the first and last of these spots being represented 

 only by a few fuscous scales. A conspicuous dark fuscous spot on 

 the lower discocellular. Conspicuous streaks of roughened texture, 

 dead white in colour, accompanying both sides of the first and second 

 median branches and of the submedian vein ; also the inner side of 

 the third median and of the median trunk from the origin of the first 

 branch to that of the third. Beneath, the fore-wing is dull white, 

 the apical region pale fuscous. The discocellular spot is larger than 

 on the upper surface, and of a less deep fuscous shade. The roiigh- 

 ened areas of the upper surface show through as dead white streaks. 

 There are traces of a pale fuscous discal spot on each side of the third 

 median, and above the second median, in each case about half-way 

 between the cell and the margin of the wing. 



The hind-wing is immaculate above, and shows no roughened 

 streaks. Beneath, it is of a pale yellow ochre, plentifully besprinkled 

 with pale fuscous scales like those of the fore-wing. These are more 

 closely set in some places than in others, forming a brownish shade 

 over the base of the wing; this shade occupies most of the space 

 between the costal and first subcostal branches, a quarter or more 

 of the subcostal interspace, and nearly the whole of the cell, stopping 

 just short of the lower discocellular. Outside the cell it accom- 



