248 Bibliographical Notice. 



the appearance of the outside of the book might indicate, for it is 

 so closely printed that the average number of words on a page 

 seems to be somewhere about 650. 



The first part of the present volume, comprising 40 pages, is devoted 

 to Family Habits in Butterfly Larva?,— the Chrysophanids, the 

 Urbicolids, and the Papilionids, and coordinates a great amount of 

 scattered information relative to exotic as well as to British 

 species. The second part of this volume, comprising 358 pages, 

 is devoted to five species only of our British " Blues " — Evens 

 argiades, Cupido minimus, Plebeius argus {agon), Cyaniris semiargus, 

 and Agriades thctis (bellargus). The remainder of the volume is 

 taken up by errata, index, &c. 



As an illustration of the thoroughness of Mr. Tutt's work, we 

 may analyze the fifty pages devoted to Cupido minimus, Fuessly 

 (alsus Fabr.), the Bedford Blue. First we have nearly a page of 

 synonymy of the genus Cupido, a translation of Schrank's analysis 

 of his subdivisions, and a discussion on the real type. Then 

 follows a page of synonymy of the species ; the original description ; 

 paragraphs on Sexual Dimorphism, Variation, followed by full 

 descriptions and critical remarks on 12 named varieties ; among 

 them being lorquinii of Herri ch-Sch after, which Mr. Tutt is inclined 

 to regard as probably a distinct species. Next we have sections on 

 Egg-laying, Ovum, Habits of Larva, Variation of Larva, Food- 

 plants ; Parasites, Puparium, and Pupa. Finally, we have sections 

 dealing with Times of Appearance throughout the range of the 

 species, Habits, Habitats, British Localities, and Distribution. 



The structure and development of the larva is treated of in very 

 great detail, and illustrated by 9 plates, several containing two 

 sections ; another plate being devoted to beautiful photographic 

 figures of the butterfly at rest in various positions, likewise of the 

 larva? and the under surface of the butterfly, and a pupa-skin of 

 Everes argiades. 



The other species dealt with in this volume are discussed in an 

 equally elaborate manner, including Everes argiades, just mentioned, 

 which Mr. Tutt regards as only doubtfully British. 



Although the bulk of the illustrations deal with the earlier stages 

 of the insects, several are devoted to perfect insects, especially 

 plate 4, exhibiting varieties of Everes argiades, Cupido minimus, 

 and Plebeius argus ; plate 5, showing Everes argiades, with varieties 

 and allied species ; and plate 42, which, with the exception of a few 

 figures devoted to Cyaniris semiargus, is entirely devoted to a 

 wonderful series of aberrations of Agriades thetis. 



We hope that Mr. Tutt may live to bring out many more volumes 

 of a book which is quite as important to the general student of 

 Lepidoptera as to the entomologist who confines his attention 

 exclusively to British species. "VV. F. K. 



