Bibliographical Notice. 553 



readily cli.stingulslied by its narrow iiiterorbital space and 

 wholly white under surface. 



For members of the genus Meriones tho name Jird, first 

 introduced by Sliaw in 1738, and spasmodically used by 

 various authors ever since, may well bo adopted as a standard 

 vernacular term, the word Gerbil boing restricted to Gerhillas 

 and its nearer allies. 



BlBLlOtillAPiliCAL x\OTiCE. 



The Coccidse of Ceylon.— Vavt V. By E. E. Greex. 

 Dulau & Co. 1922. 



The last part of Green's monumental work on the Coccidae of 

 Ceylon has appeared. Like the preceding parts, the work is 

 profusely illustrated, the plates being done from drawings hy the 

 author hiiQself ; each species is very carefully delineated, and many 

 of the figures coloured. Though the price is high (=£;i), considering 

 the class of -work and the cost of production it is not excessive. 

 By the conclusion of the work the author has contributed in no 

 small way in placing the study of the Coccidae upon a footing, from 

 a systematic point of view, such as few families of insects have 

 reached. The work is not only a description of the adult insect 

 itself; in nearly all cases the early stnges are described, and very 

 valuable field-notes, made by the author while in Ceylon, are 

 included. In the present part the Eriococcina?, Dactylopiinac, 

 Tachardiinae, Ortheziinae, Margarodinae, and Monophlebinae are 

 dealt with. Six new genera, twenty-seven new species, and several 

 new varieties are described. The author's conception of tlie limits 

 of the genus Monopldehus — and he is prohably right — is wider than 

 that of some other authors, the genera Drosicha, Llaveia, I'essura- 

 holus, Ortoyiia, Gnerinid, and MonophJehulus heing sunk as synonyms. 

 Two appendices are added, the first correcting, emending, or adding 

 to the previous parts, and the second giving a very useful list of 

 those s|)ecies of Coccidae which have been described as new or 

 recorded from Ceylon since the various parts were first published. 



L. 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



May 24th, 1922.— Prof. A. C. Seward, Sc.D., F.R.S., President, and 

 afterwards Dr. G. T. Prior, E.R.S., Vice-Prcsidcnt,in the Chair, 



The Phesidext then pix)ceeded to deliver a lecture (illustrated 



