TNSECTA. 
227 
INSECTA. 
THE GENERAL SUBJECT 
By E. C. Rye. 
Becker, Alex. Reise nach Derbent. Bull. Mosc. xlii. pp. 
171-199. 
Contains references to food-plants and habits of insects, p. 184, 
and Catalogues of the species of Lejndoptera, Coleopteraj HemU 
ptera, Hymenoptera, Neiiroptera, and Diptera at pp. 193-197. A 
short list of Astracan Coleojiter'a observed since the publication - 
of the author’s former papers is given at pp. 198 & 199. 
Brandt, Joh: Friedr. Beitrage zur Naturgeschichte des Elens 
in Bezug auf seine morphologischen und palaeontologischen 
Vcrhaltnisse, so wie seine geographische Verbreitung, nebst 
Bemerkungen uber die Miocaena- Flora und Insectenfauna 
des Ilochnordens. Mem. Petersb. 7th ser. xvi. no. 5. 
The author observes (pp. 81 & 82) that the insects of the 
Miocene of the extreme north belong to the same genera as those 
which now inhabit the North of Europe, Asia, and America 
(c. g. Troyosita and Pentatoma) ^ or to genera and species resem- 
bling those of the present epoch, such as Chrysomelites fabricii 
and Blattidium fragile. 
Dohrn, C. a. Ueber die Bedeutung der fundamentalen Ent- 
wicklungsvorgange in der Insecten-Eiern fiir die Systematik 
der Insecten. vS. E. Z. xxxi. pp. 214-250. 
This appears to be the substance of a discourse delivered by 
Dr. Anton Dohrn at Innsbruck in 1869 on the bearing of the 
fundamental principles of the development of the ovum upon 
the classification of insects, especially testing GerstackeFs 
system by the application of a scheme according to which all 
insects are divided into two sections : — one, Ectoblastaf in which 
the covering of embryonic cells becomes increased at one spot, 
and thence spreads over a large part of the eircumference of the 
yelk, which becomes entirely surrounded by germinal shoots ; 
the other, Endoblasta, in which the increase is directed inwards 
to the centre of the egg, so that the germinal shoots are sur- 
rounded by yelk. 
Dunning, J. W. Notes on a collection of Insects sent by Mr. 
Ansell from South-west Africa. Tr. E. Soc. 1870, pp. 521- 
532 (Dec.). 
A list (with general observations) of 129 species of Insects 
