THE GENERAL SUBJECT. 
345 
LowNE, B. T. On the characteristics of certain of tlieHymen- 
optera. J. Quek. Club^ iii. pp. 187-191. 
A recapitulation of (xanin's paper on embryonic development of Platy- 
gaster^ &c. [Zool. Rec. vi. p. 174]. 
Marshall, T. A. A Catalogue of British Hymenoptera ; 
Oxyura. London : 1873. 8vo, pp. viii. & 27. 
The 4th part of the proposed Catalogue of British Insects referred to 
in Zool. Rec. ix, p. 314. Of the Proctotrypidce, 3 genera and 17 species 
are enumerated ; Ceraplironidce^ 6 genera, 39 species ; BetlujUdce, 5 genera, 
6 species ; Dryinidce, 6 genera, 27 species ; EmboUmidcc, 2 genera, 2 
species ; Heloridcn^ 1 genus, 3 species ; Belytidce, 10 genera, 26 species ; 
Diapriidce, 13 genera, 52 species ; Scelionidai, 10 genera, 61 species ; 
Platygastridce, 15 genera, 111 species; Mymaridce, 12 genera, 36 species: 
in all, 83 genera, 373 species. Complete synonymical and bibliographical 
references are given. Eight of the species are new to Britain \cf. Ent. 
Ann. 1874, pp. 131 & 146]. 
For review by J. W. Dunning of part 2 of this Catalogue, see Ent. M. M. 
ix. pp. 221-224. 
Radoszkowsky, 0. DE BouRMEisTER. Supplement indispensable 
a 1' article publie par M. Gerstaecker en 1869, sur quelques 
genres d'Hvmenopteres. Bull. Mosc. xlvii. pp. 133-151, 
Observations on various genera of Apides, especially drawing attention 
to the structure of the maxillary palpi [c/. Zool. Rec. ix. p. 317]. The 
author severely criticizes various changes proposed by Gerstacker. 
Saunders, [Sir] Sydney Smith. On the habits and economy of 
certain Hymenopterous Insects which nidificate in briars ; 
and their parasites. Tr. E. Soc. 1873^ pp. 407-414, 
woodcuts. 
Describes the habits of certain EumenideSj a new genus of Crabronidce, 
and 2 new species of Chrysididce and Chcdcididai^ all from the Albanian 
district. 
SiCHEL, J. Considerations zoologiques sur la determination 
de Pespece et sur la fixation des limites entre elle et 
la variete, tirees principalement de Fetude de Fordre des 
Insectes hymenopteres. Mem. Liege (2) iii. pp. 1-19. 
A posthumous work. The author's propositions are: — 1 & 2, that the 
characters of a species should be established on great numbers of 
individuals ; 3, habits may serve as auxiliary specific diagnostics ; 4, the 
study of the larva is expedient ; 5, parasites, varying in different species, 
also assist the determination ; 6, geological formation has more influence 
than vegetation upon the degree of rarity of species and genera ; 7, cli- 
matic influences are the most powerful in the development of varieties ; 
and 8, a species is permanent, but subject to indefinite modification as 
regards varieties. 
