520 MK. W. r. KIEBT ON 



another snail ; and we frequently find during the winter months 

 large colonies of hyhernating snails attached firmly to one 

 another. After selecting a suitable locality the first act is to 

 throw out from the mantle-margin, in which the secreting 

 function would seem to be especially active, sufficient material 

 to glue the edge of the shell firmly to the subjacent surface. 

 When this has been accomplished, the epiphragm is completed 

 by a secretion from the general surface of the phragmatogenic 

 disc. 



On the approach of spring, and when the conditions rendering 

 necessary the presence of an epiphragm no longer exist, the 

 snail once more awakens from its sleep, and the central opening 

 in the phragmatogenic disc again makes its appearance, and gives 

 exit to the foot and head of the snail, which then, pressing on the 

 membranous epiphragm, rupture it, and thus allows the animal to 

 enter freely into all its relations with the surrounding medium. 



Descriptions of new Species of Forficulid(s in the Collection 

 of the British Museum (Nat. Hist.), S. Kensington. By 

 W. F. KiEBY, r.L.S., F.E.S. 



[Read 18th June, 1896.] 

 (Plate XX.) 

 Since the publication of my " Revision of the ForJiculiclcB " (Linn. 

 Soc. Journ., Zool. vol. xxiii. pp. 502-531), little of importance 

 has been published on the family, except an article by De Bor- 

 mans in the ' Biologia Centrali-Americana,' and the descriptions 

 of a few new species by De Bormans, Brunner von Wattenwyl, 

 and others. Forficnlidcd are insects which are seldom collected, 

 and they generally arrive as single specimens, which are fre- 

 quently damaged, or, if perfect, are not sufficiently well marked 

 to render it advisable to characterize them from a single speci- 

 men, necessarily representing only one sex. Consequently, I 

 have only about a dozen new species to describe in the present 

 paper ; but some of them are extremely handsome and remark- 

 able forms acquired from the collection of the late Mr. Paseoe 

 and from other sources. 



There is an error in my Table of Genera (pp. 504-505 of the 

 above-quoted paper), which it may be as well to take the present 

 opportunity of conspicuously rectifying. On p. 504, 2ud & 



