( Ivii ) 



in the collection of Mr. W. J. Adams — probably constituting 

 a new genus. The neuration most resembled that of the genus 

 Aslauga, Kirby, but varied chiefly in the different place of 

 origin of the sub-costal nervures of the fore-wing, and in the 

 deeply excised inner-margin of the hind-wing. 



Arctiid from HyJiebs — Mr. J. W. Tutt exhibited examples 

 of Spilosoma mendica, bred by Dr. Chapman, from ova found 

 at Hy6res,'Var., the females mostly normal, but some with a 

 well-defined black border round all the wings. These latter, 

 ab. nigromarginata, Tutt, were rather striking, but the total 

 variation was much less than that exhibited in Mr. Porritt's 

 well-known series, described and figured in the Transactions 

 in 1889. 



Colour Variation in Hbliconiine Butterflies. — Mr W. 

 J. Kaye exhibited series of the two species of Heliconius — H. 

 chestertonii and K. weyineri from Western Colombia. The 

 series of U. iveymeri included beautiful transitional forms to 

 the aberration gustavi in which all trace of the fore-wing mark- 

 ings had vanished. Here there was what appeared on the 

 surface to be an approach of the species iveymeri to chestertonii, 

 but the elevations at which the two species occurred were 

 widely different, H. chestertonii occurring in the lowlands and 

 according to Mr. W. F. H. Rosenberg, its range never exceeds 

 1000 feet above sea level, while H. weymeri, according to Mr. 

 A. H. Fassl, with its varied forms was found at from 4-5000 

 feet, at which elevation the specimens shown were caught. 

 It is probable that there was some common influence at work 

 to produce a black fore-wing, as this phenomenon was found 

 in several other species of Heliconius from Colombia, particu- 

 larly in the Cauca valley. Heliconius doris in both its red and 

 blue hind-winged forms produced black fore-wing aberrations 

 known as tecta. Heliconius ismenius also occasionally produced 

 much darkened fore- wings. 



Temperature experiments with pupae of Pieris brassicae. 

 — Dr, T. A. Chapman exhibited pupae of Pieris brassicae and 

 made the following remarks upon them : — 



" Early in October I happened on a fence with scoi-es of 

 larvae of Pieris brassicae, scampering over it in search of 

 pupating stations. I brought home on several occasions 



