133 



olivacea, Tutt) of Lasiucampa {Bomhyx) qiiern'is from the Cheshire 

 coast sandhills, with the dark cocoon from which one of the above 

 were bred, and a very dark coloured larva (preserved) similar to 

 those which produced the melanic forms. 



Mr. A. E. Gibbs exhibited a series of 56 specimens of Aijriades 

 coridon, selected frOm series taken in 1915, in or near the borders 

 of Hertfordshire. Among the 47 specimens from Royston were 

 examples of ab. semi-nynijraiiha, females showing series of blue spots 

 inside the usual antemarginal ones, female with white fringe, 

 rayed females, minor underside variations, including a 5 in which 

 the light borderings of the spots on the underside were coffee-colour, 

 contrasting with very white-ringed specimens. Three specimens 

 were from Dunstable, two of which, females, had one pair of wings 

 smaller than the other. There were six examples from Aldbury, 

 taken by Mr. A. J. Wightman. One is a male, and it has a well 

 marked bright orange spot inside the second black antemarginal 

 spot on hindwing ; the second is a female, and has a row of quite 

 brilliant little blue points adjoining the antemarginal band on 

 hindwing. Other specimens have the discoidal spots conspicuously 

 outlined in white. 



Mr. A. Bacot exhibited living examples of the yellow-fever 

 mosquito, Stetjonn/ia fasciata, ova, larvte, pupae, and adults. 



Mr. Stanley Edwards exhibited species of the parts group of the 

 genus Papilio, including P. c/aiiesa, P. pulyctor, P. arjiina, P. brama, 

 P. arctiiriis, all from India, P. peranthns from Java, P. inontantis 

 from Ceylon, and P. bianoj from China and Japan. He also 

 showed the Palaearctic form of P. parts from Thibet with the spring 

 form, var. renialis, and the local race, var. karna, from Java. 



Mr. E. J. Salisbury, D.Sc, gave an exhibit illustrating the 

 Variation in the Seedlings of Zea mais, and contributed the 

 following notes : — 



" The embryo of grasses has been variously interpreted. The 

 Scutellum is by some regarded as the Cotyledon, and by others as 

 only part of the cotyledon. The first green structure or coleoptile 

 is in the latter view regarded as the sheath of the modified first 

 leaf or scutellum. 



" If the scutellum be regarded as constituting the entire cotyledon 

 then we have the difficulty of two leaves, viz., scutellum and coleop- 

 tile superposed. That the scutellum is part of the cotyledon is sup- 

 ported by its origin being terminal, as is the single cotyledon in 

 other monocotyledons. 



