1853.] Linnean Society. 249 



in the larva state, and then into pupse ; as is the case with the Hyrae- 

 nopterous larva of Ophion luteum which infests the puss moth. The 

 pupa of this parasite on Pavonia differs from that of the Earwig in 

 its surface retaining distinct roughened annular indications of the 

 twelve segments of the body of the larva, and also in the breathing 

 organs being marked by three slight protuberances on each side, at 

 the posterior extremity, above the anus. 



The author also described and exhibited two remarkable cocoons 

 of the Emperor Moth. One of these had two perfect outlets, but 

 in other respects was a single cocoon, and had contained only one 

 pupa from which the moth had been developed. The other was a 

 large flattened cocoon, which, examined externally, appeared but as 

 a single structure, but when opened was found to have been the 

 joint production of two larva. It was divided internally, by a septum, 

 into two ch-cimbers, to which, however, this double cocoon had but 

 one outlet. One of the larvae had died before changing to a pupa. 

 The other had changed and had afterwards produced the moth, but 

 which had been unable to liberate itself from the cocoon, owing to 

 the obstacle opposed to its egress by the septum. It had become 

 impacted, and had died in the cocoon in its attempts to escape through 

 the outlet. 



June 21. 



Thomas Bell, Esq., President, in the Chair. 



John Samuel Gaskoin, Esq., the Rev. Francis Thomas Macdougall, 

 M.A., and S. James A. Salter, Esq., were elected Fellows. 



Berthold Seeman, Esq., F.L.S., laid before the Meeting a com- 

 munication which he had received from Prof. Nees von Esenbeck, 

 President of the Imperial Leopoldino- Caroline Academy of Naturalists, 

 congratulating the Linnean Society, in the name of the Academy, on 

 its choice of Prof. Bell as President. 



Read the following Extract of a Letter from T. S. Ralph, Esq., 

 A.L.S., to Richard Kippist, Esq., Libr. L.S., dated Jan. 4th, 1853 ; 



