166 



PSYCHE. 



[Fcbniaiy — Marcli 1SS9. 



To exhibit it a glance the dirterences 

 in the males the following table is added : 

 Anterior ventral segments pubescent at 

 middle, front thighs toothed. 

 Front tibite angulate. 



Hind thighs not toothed, prosternum 

 ^'el^■ety pubescent at middle. 



A. sculptile. 

 Hind thighs toothed, prosternum 

 smooth. B. 



Front tibiaj sinuate, not at all angu- 

 late, prosternum smooth, hind 

 tibiffi with stronger apical process. 

 C. 

 Ventral surface without \elvet\ pube- 

 scence along the middle, front 

 thighs not toothed, front tibiae not 

 angulate, apical processes of mid- 

 dle and hind tibite very long. 



D. calcaratum. 

 C. sculptile Newm. is not rare in the 



Atlantic States. C calcaratum Lee is 

 from Or. and V.I. 



Were the above described secondary 

 $ characters in A, B, and C, accom- 

 panied by any constant diftcrences in 

 form or sculpture, three very distinct spe- 

 cies would seem to be indicated ; but 

 there does not appear to be the slightest 

 clew to show which females belong with 

 any of the males, and it is perhaps not 

 impossible that a series of specimens 

 may prove that the 9 of D, is not easily 

 distinguishable from the eastern forms. 



In conclusion it is suggested that those 

 who are located within the faunal limits 

 of Cli/iidium examine their material for 

 the purpose of learning if all the varia- 

 tions mentioned, or any others not yet 

 noted, occur in one locality. In the 

 vicinity of Lowell the family does not 

 appear to be represented. 



SOME NEW COMPARISONS OF PIERIS OLERACEA WITH P. NAPI. 



BV SAMUEL HUBBARD SCUDDER, CAiMBRIDGE, MASS. 



As Pier is oleracca of North America 

 has been regarded as identical with P. 

 napi of Europe by some who have stud- 

 ied only the markings of the wings, I 

 have thought a comparison based on the 

 early stages would be desirable ; this I 

 am now able to make by the kindness of 

 Mr. J. Jenner Weir of England, who has 

 kindly sent me a number of specimens 

 of blown larvae and living chrysalids of 



the latter. Other caterpillars from the 

 continent have been ofservice. 



The mature caterpillar of P. oleracea 

 differs from that of P. napi of Einope 

 in the more uniform pile with which the 

 body is clothed, and by the apparent ab- 

 sence of those comparatively large coni- 

 .cal wartlets, ten or twelve times larger 

 than the smaller ones, which form so 

 conspicuous a feature in both P. napi 



