7 
The greatest drawback to the study of the group has previously been 
the want of a suitable and exhaustive text-book, but now that Mr. J. 
E. Robson, of Hartlepool, is publishing a Monograph of the Pterophorina 
in parts, which contains almost everything at present known about 
our British species, such an excuse does not exist; and as the price of 
each part is only 6d., and can be obtained by simply sending the 
stamps to Mr. Robson, the poorest collector can take up the group 
with some prospect of rapidly becoming conversant with the species 
contained in it. 
At the conclusion of the paper, Mr. Simes proposed that a vote of 
thanks be given to Mr. Tutt for his paper. This was seconded by Mr. 
Bayne, and carried. 
The Secretary then read two letters from Mr. R. McLachlan, F.R.S., 
relating to Mr. Milton’s paper on “ Dragonflies,” in which the author 
states that“ the genital organs of these insects are placed in the thorax.” 
Mr. McLachlan says :—“ There is some great misapprehension here. 
The real facts are that in the f the genitalia are placed partly in the 
underside of the semid segment of the abdomen , and partly in the under¬ 
side of the ninth segment. In the $ , the parts are situated as is usual 
(in the ninth segment);” and in the second letter he writes :—“ The 
opening of the vesiculce seminales is situated in the ninth segment. The 
penis, with certain excitatory organs, is in the second segment. I am 
not aware that any direct internal connection has ever been found 
between the two sets of organs, and the belief is, that the £ 
charges the penis by bending up the end of the body to the 
second segment before pairing, or, during the time the connection is 
only by means of the anal claspers to the neck of the 5 , This is 
warranted by certain movements of the $ (best seen before pairing), 
observed by several writers, and of which I have myself been a witness. 
The whole proceeding is very extraordinary. It is only when the sexes 
are doubled up, as it were, that actual pairing is taking place, which is 
quite independent of the holding on of the to the neck of the $ . It 
seems very probable that actual pairing takes place several (or many) 
times between the same pair, or with different individuals of each sex ” 
(in litt ., Jan. 13, 1892). Mr. Tutt and Dr. Buckellhoth drew attention to 
the great scientific value of the communication and made comments 
thereon. 
Thursday , February 4th, 1892.—Exhibits :—Mr. Tutt, some very fine 
forms of Cirrhcedia xerampelina, which he had received from the Rev. 
Joseph Greene. These included some fine examples of the var. 
u?iicolor , Stgr., which he said w T as common in parts of Germany, and 
also in Southern France, where it occurred in equal numbers with the 
type ; he stated that the common British form was the var. centrago, 
Haw. He also exhibited Hadena pi si and Panolis piniperda (red and 
grey forms), and a melanic var. of Eupithecia fraxinata captured by 
Mr. Tunstall, near Warrington. Mr. Clark, four specimens of Mixodia 
rufimiirana , bred by Mr. Eustace Bankes, from larvae taken in Hampshire. 
Mr. Battley, a number of species taken in Epping Forest, including a very 
small specimen of Pieris napi $ , Trichiura craicegi , etc. Mr. Bayne, a 
series of Lithosia aureola from Epping. Mr. Simes, Vanessa polychloros, 
Dicycla 00, etc., from Epping Forest. Mr. Sykes, Polia flavicincta, 
Xanthia ferruginea and other autumnal species from Enfield. Mr. 
