176 



THE BRITISH NATURALIST. 



August 



Ody}ierus spbiipes with its parasites Chrysis bideutata and neglecta, the 

 two first named came out m the foUowmg summer, but neglecta did 

 not appear until 24 June, 1S92. In ^larch I opened one of the cocoons 

 and saw the larva was still alive but much contracted, I then gave the 

 sand, in which were the cocoons, a good watering and left the flower 

 pot with its contents exposed to the weather, at tlie beginning of 

 June 1 removed them indoors and exposed them to the sun, with the 

 result of this treatment I have bred three. — G. C. Bignell, 

 Stonehouse, Plymouth. 



Mollusca. 



N0TE.---I have seen Phasianella pullus, var. blcolor, Monts., 

 from South Wales, collected by Mr. Barrett. This is new to 

 Britain; it is simply a mutation with alternate tvansvcrse broad bands 

 of white and red. In the same lot from South Wales was niut. 

 millepiuictata, described by me in 1887. — T. D. Cockerell, Kingston, 

 Jamaica. 



A CATALOGUE OE 



THE SLUGS OF THE BRITISH ISLES,* 



BY WALTER E. COLLINCxE, 



• Assistant Demonstrator in Zoology, St. Andrew^ s University , and 

 Editor of" Tlie ConcJiolos^ist." 



I am constantly being asked by correspondents and malacologists 

 for a list of British Slugs, and to meet this want I liave compiled the 

 followinjig one. During the last five years an increased interest has 

 been taken in the slugs, wdth the result that a number of species have 

 been added to the list as well as numerous varieties. 



Well-marked and constant specific or generic characteristics are 

 difficult to find in the slugs. Most anatomists are, however, now 

 agreed that general form, coloration, structure of the shell, lingual 

 ribbon, &c., are characters which vary vv4th age and habitat, and for 

 specific or generic distinction are unsatisfactory, thus Simroth, Scharff, 

 Jourdain, Garnault, Pollonera, and others have all decided in favour 

 of differences in the alimentary and generative systems (especially the 

 latter), they being better marked and more constant. 



*The important additions recently made to our knowledge of the British Slugs, 

 especially the recognition of several species of Arionida' not previously known to exist 

 in this country, render the publication of new lists from time to time a necessity to 

 the student of this most interesting branch of Malacology. It is, therefore, with 

 great pleasure that the following new list is presented to the readers of the B.N . 



I AUG. '■^ "> 



