( lxxi ) 



and part the normal blue ; all taken on the wing in September 

 1916 in East Kent. It was noticed when this leaden-coloured 

 c? flew that normal $ q chased it, taking it for a $ ; this 

 happened in three cases. This leaden form very much re- 

 sembled a $ at first sight. A friend, who was collecting on the 

 same ground for aberrations, made a practice of netting 

 every <J, and before liberating it rubbing it so that he would 

 know it had been examined. This removed most of the blue 

 scales, and when flying they looked very curious; dozens of 

 times (J $ were seen to chase these specimens thinking them 

 to be $ $. These observations seemed to point to the fact 

 that thetis $ £ are attracted to the $ by colour. 



The Rev. G. Wheeler inquired whether the leaden-coloured 

 specimens had been examined for androconia. As the rubbed 

 specimens would have been deprived of them, it was possible 

 that the absence of their scent might be the cause of their 

 being mistaken for $ $. 



Mr. Newman said that they had not been examined, but 

 should be. 



Dr. Cockayne said that the fact that the ab. semisyn- 

 grapha of A. coridon was pursued by $ $ (as the typical <J $ 

 are at Royston), looked as if they judged by colour. 



Teratological Coleoptera. — Mr. 0. E. Janson ex- 

 hibited a male specimen of Carabus catenulatus taken by 

 Mr. Bonaparte Wyse on Snowdon, showing arrested develop- 

 ment in the left posterior leg. 



An example of Telropium gabrieli bred by Mr. C. J. C. 

 Pool from larch from Sutton Park, Staffs., in which the right 

 antenna consisted of only eight joints and bore a basal 

 branch of three joints. 



A specimen of Dorcaclion egregium from Mongolia, exhibiting 

 a very rare instance of an almost symmetrical duplication of a 

 limb, both of the antennae bearing a short three- jointed branch 

 arising from the large basal joint, the antennae themselves 

 being otherwise normal. 



Aberrations of Arctia caja. — Mr. Janson also exhibited 

 on behalf of Mr. F. W. Frohawk two remarkable varieties 

 of Arctia caja reared this season from larvae from the Scilly 

 Islands. 



