( clxi ) 



colombina. These forms were purchased from a dealer with 

 only the in formation "' Colombia," 1 nit it is almost certain 

 that they came from some part of the Cauca Valley. //. erato 

 molina fitted well into the connecting series, and had still more 

 red of the fore-wing band. It was recorded from Valdivia, 

 and was probably only an occasional aberration, as it was only 

 known from the type specimen. 



Larval Skins of Dytiscus marginalis and Hydrophilus 

 piceus. — Mr. Hugh Main exhibited as transparencies in the 

 epidiascope the larval skins of Dytiscus marginalis, which had 

 been handed round at the meeting on Oct. 2. They appeared 

 quite satisfactorily on the screen, showing the general charac- 

 ters and such details as the manner of dehiscence of the skins 

 and the fringes of hairs on the various appendages, etc. It 

 was pointed out that the tail appendages in the first larval 

 skin were only fringed on the outer side, while in the succeed- 

 kins they were fringed on both sides. The moulted 

 skins of the larva of Hydrophilus pic> us were also shown, and 

 the spread-out empty skin of the pupa. 



Such series illustrated very graphically the great increase 

 in size of the larvae in the very limited time in which they 

 passed through this stage of their life-history, viz. just under 

 eight weeks from hatching of the egg to disclosure of the 

 pupa, in the case of both insects. 



Mr. E. A. Butler commented on this exhibit. 



SPECIAL MEETING. 

 Wednesday, November 6th, 1918. 



Dr. C. •). Gahan, M.A., D.Sc. President, in the Chair. 



The Notice calling the Special Meeting was read by the 

 Secretary, the object of the meeting being to make an 

 alteration in Bye-law viii. the proposed change being sup- 

 ported by the Treasurer, the President, Comm. Walker, 

 Dr. Chapman, the Rev. F. D. Morice and Mr. Jones. 



The Treasurer formally proposed to delete Clause 5 of 

 Ch. viii, and to substitute : — 



PROC. ENT. SOC. LOND., Ill, IV. 1918. L 



