94 



similar to that in C. pityocauipa exhibited by himself at the 

 last meeting. It consisted of a single or double frontal spine, 

 obviously of use for forcing the prepared window of plant 

 epidermis with which the larvae supplies the puparium, — a 

 structure here occurring in the imago of an obtect species 

 that occurs so commonly in the pupae of the Incompletae 

 This structure occurs in various species of Nonagria. 



Mr. Edwards exhibited a number of specimens and species 

 of the fungi found during the Field Meeting at Oxshott on 

 October 20th. Dr. M. C. Cooke had identified the species 

 for the Society. At the same time Messrs. R. Adkin and 

 Edwards gave a report of the gathering (see page ig). 



Mr. Mera exhibited several specimens of Colias edusa, 

 C.edusa var. helice, and intermediate varieties; very pale 

 specimens of C. hyale ; and a very well-marked specimen of 

 Smerintkns populi, with the suffused area at the base of the 

 hind-wing yellow instead of dull red. 



Dr. Kremlin then read a short paper on " Bacteria," 

 illustrating his remarks with a varied exhibit, showing the 

 methods of culture, and the apparatus used by bacteriologists. 



NOVEMBER Sth, 1900. 



Mr. W. J. Lucas, B.A., F.E.S., President, in the Chair. 



Special Exhibition of Varieties. 



Mr. H. Mc Arthur exhibited a long series of Melanippc 

 hastata, showing local and extreme variation, from Sussex, 

 Kent, York, Rannock, Isle of Lewis, Orkney, Shetland, and 

 Iceland ; and TriphcEua comes (orbona) showing local and 

 extreme variation, from South of Ireland, North Devon, Isle 

 of Lewis, and Orkney. Orkney is the most northern British 

 locality known for this species, and specimens from that 

 locality are, like those exhibited, of the extreme dark form. 



Mr. B. Adkin exhibited a specimen of Engonia polychloros, 

 with very pale ground colour, bred from a New Forest larva, 

 igoo ; a specimen of Triplicena fimbria having the black band 

 extending along inner margin, — it was bred from a New 

 Forest larva, igoo ; and two specimens of Catocala promissa 

 having pale upper and hind wings, with narrow and straighter 

 medium band, one taken at Hythe, i8g5, the other in the 

 New Forest, igoo. 



Mr. Winkley exhibited the specimen of Catocala nupta var. 

 cceyulescens, captured by him at ^Slitcham, Surrey, August 



