iidO Bibliographical Notices. 



saw, who has fiirnished them with an elaborate descriptiou of the 

 embryonic development of Blatta gennanica, while Mr, S. H, 

 Scudder has contributed a sketch of the geological history of the 

 Blattidffi, The volume is illustrated with a number of woodcuts, 

 generally well executed, which will be found most useful to the 

 student ; in fact, the book must be regarded as a most valuable 

 contribution to the practical literature of zoology. 



Exotisclie Schmetterlinge. Ahhildungen unci Beschreibungen der ivicli- 

 tigsten exotisclun T'ag falter in sgstematiscJier Reihenfolge mit Beriicl-- 

 sichtigung neuer Artin, von Dr. 0. Statjdinger, unter technischer 

 ]\Iitwirkung von Dr. H. Langhaus (1-16 Lieferungeu). II. 

 Theil. Die Familien und Gattungen der Tagf alter systematiscli mid 

 anah/tisch bearbeitet, von Dr. E. Schatz (1, 2 Lieferungen). Folio. 

 G. Lowensohn : Furth (Bavaria), 1884-80. 



In the present work Dr. Staudinger has successfully attempted to 

 supply a want which all collectors of exotic butterflies have felt 

 severely, especially at the beginning of their studies. Hitherto there 

 has been no work, at a moderate price, containing a large number 

 of fairly-recognizable coloured figures of foreign butterflies in syste- 

 matic order. The older illustrated books, few of which are at aU 

 systematic, are not only expensive, but are becoming scarcer and 

 dearer every day ; and it is not every one who can refer to an ar- 

 ranged collection. Dr. Staudinger's work is to contain 100 large 

 plates, 80 of which are now before us, and each plate contains from 

 two to nineteen figures, representing all the principal genera and a 

 large number of species. It has been the author's aim to make his 

 work as useful as possible, and he has not excluded remarkable 

 species because they are common, nor has he omitted to include a 

 number of rare and new species which have not previously been 

 figured. The figures are fairly recognizable throughout, and are 

 often excellent, and the standard is well kept up, the later plates 

 being often superior to the earlier ones. 



Dr. Staudinger has not discussed generic characters &c,, but has 

 left everything beyond the description of species to bo dealt with in 

 the companion work of Dr. Schatz, two parts of which have at pre- 

 sent appeared, out of six, which are to complete the work. Dr. 

 Schatz discusses classification, geographical distribution, colour, 

 neuration, and generic characters, and proposes some slight im- 

 provements in classification. The plates of this portion of the joint 

 work are plain, and represent with great clearness the neuration of 

 the wings in each genus, and other generic characters, such as an- 

 tennae, palpi, tarsi, claws, anal appendages, scales, &c. The charac- 

 ters are thus rendered very obvious, and the very doubtful propriety 

 of retaining the genus Pseudopontia of Felder, which many good 

 authorities regai'd as a Liparide moth, among the Pieridae becomes 

 visible at a glance. 



If we desired to be hypercritical it might be easy to pick out 



