( Ixxviii ) 



mens. It occurs on the shore in Hants and Dorset {1 Kent) ; 

 and has been taken casually in Liverpool. 



He also showed two cells of the solitary wasp Eumenes 

 coarctata found in New Forest on Oct. 31, 1908, having 

 never found two together previously. 



The Double or Combined Aposeme. — Dr. F. A. Dixey ex- 

 hibited specimens of Heliconius amjyhitrite, Riff., and II. chari- 

 thonia, Linn. ; also a coloured drawing of H. hermathena, 

 Hew. He remarked that each of the first two species showed 

 a distinct and well-marked aposeme or warning character ; 

 each of them, and especially the first, belonging to an exten- 

 sive mimetic assemblage. In the third species these two 

 distinct aposemes were combined. 



These specimens illustrated the fact that a conspicuous and 

 distasteful form might acquire a new aposeme without relin- 

 quishing its old one, such an intermediate form presumably 

 sharing in the protection afforded by the aposematic forms on 

 each side of it, while the separate aposemes which it exhibited 

 were not mutually protective. This would give the inter- 

 mediate form an advantage over the extremes, provided that 

 all were found in the same district, or (which was not quite 

 the same thing) were exposed to the attacks of the same 

 enemies. In this "particular case the facts of geographical 

 distribution made such a protective relation between the 

 forms unlikely ; but the series afforded a good illustration of 

 the actual existence of what he had before spoken of as the 

 "double" or "combined" aposeme. 



Forms of Polyommatus bbllargus, and Zyg^na. — Dr. 

 G. G. Hodgson, who was present as a visitor, exhibited a 

 series of Polyovimatus hellargus from Surrey localities, includ- 

 ing a partially gynandromorphus $ , two-thirds of the hind- 

 wings with the typical $ coloration and markings : a series 

 of var. ceronus taken in 1907, and specimens showing a variant 

 underside recurrent in the same locality. He also exhibited 

 a series of Zygeena trifolii, and Z. Jii2}2Jocre2yidis from one 

 locality, including twelve melanic examples of the former, 

 with other common forms and aberrations, probably of the 

 latter, with the sixth spot wanting, or represented by a mere 

 dot. 



