166 THE ENTOMOLOGIST. 



away with the suggestion that the attraction is due to electric waves. 

 The suggestion of Mr. Stringer that the antenna of the females 

 might be "transmitters" and those of the males "receivers" is 

 ingenious and imaginative, but it presupposes the power of setting 

 up an electric current in the body of the female, of which there is not 

 the slightest evidence. I have failed with a delicate electroscope to 

 detect any current emanating from a " calling " female, and with 

 regard to his suggestion of putting the female in a metal box, I have 

 done this with the female of M. rubi and males have come to it. 

 The vibration of the wings appears to cause merely an air current, 

 and most likely is simply the result of sexual excitement and has no 

 direct connection with the attraction of the male. One should not 

 lose sight of the fact that this peculiar sense of sexual attraction at 

 a distance is not confined to insects, but exists, as is well known, in 

 other animals. It would, as suggested by Mr. Nicholson, be very 

 instructive and perhaps enlightening to have an analysis of various 

 lights and some direct experiments with them on their relative attrac- 

 tiveness. — J. E. Campbell-Taylor ; Lewes, Sussex. 



The Sale of Dr. Chapman's Books : A Sequel. — In my review 

 of the sale of this library in the April number of the ' Entomologist,' 

 I mentioned that sets of the ' Stett. Ent. Zeit.' and of the ' Annales 

 of the Societe Entomologique de France ' were sold for £3 each set. 

 I now learn, from a friend, that the identical set of the former has 

 been recently offered to him for £30 ! and a set of the latter for 

 £150 ! ! Comment is unnecessary ! I hope to return to the subject 

 of the present value of old entomological books in this magazine at 

 an early date.— W. G. Sheldon ; May 9th, 1922. 



Psithyrus distinctus in Kent. — On June 7th, at Birchwood, I 

 took a 9 specimen of Psithyrus distinctus, this being the first of 

 the species that I have encountered in this locality. — E. Howard 

 La sum, E.L.S., E.Z.S., E.E.S. ; Eernside, Shepherds Lane, Dartford. 



Colias croceus at Delamere.— A Golias croceus, which I think 

 was a female, was seen flying at Delamere on May 28th. On June 

 4th, also at Delamere, Mr. W. Eutter and myself saw three more, 

 two males and a female var. helice, the latter in cop. with one of the 

 former. — A. H. Thompson ; 54, Church Boad, Northwich. 



RECENT LITERATURE. ^ 



The Bulletin of the Hill Museum : A Magazine of Lepidopterology. 

 Edited by J. J. Joicey and G. Talbot. Vol. i, No. 1. 

 Pp. 200 + 32 plates. London : John Bale, Sons & Danielsson, 

 Ltd. October, 1921. 



Though somewhat belated, it is hoped this notice is not too late 

 to convey to Mr. Joicey and his assistants our congratulations on the 

 appearance, and on the contents, of this new publication. As the 

 title explains, the magazine is devoted entirely to Lepidoptera, and 

 commences with a brief notice of the aims, methods, and previously 

 published results of work undertaken at the Hill Museum. The bulk 

 of the text is occupied by papers contributed by Messrs. Joicey, 



