THE GENERAL SUBJECT. 
Tn.^. 3 
Cook, A. J. Insects in Winter. Psyche, iii. pp. 18C-185. 
Most insects freeze in winter, and it is only occasionally that they 
suffer from the effects of actual cold. Hive-bees, however, pass the win- 
ter without hibernation, but remain quiet, only taking food enough to 
support life ; and an unusual degree of either heat or cold in winter is 
highly injurious to them. 
CuNi Y Martorell, M. Datos para una Flora de los Insectos de 
Cataluna. An. Soc. Esp. x. pp. 433-461. 
Cyrus, C. Ninth Report of the State Entomologist on the Noxious and 
Beneficial Insects of the State of Illinois. Springfield : 1880, i>p. 142, 
woodcuts. 
Includes articles on Cabbage Insects, Sheep Parasites, and Acridiidce^ 
the last being monographed. 
Dalla Torre, K. W. v. Addenda und Corrigenda zu Hagen’s Biblio- 
theca Entomologica. iii. Ent. Nachr. vii. pp. 45-48, 163-170. 
De Borre, P. Quelques mots sur I’organisation et Phistoire naturelle 
des animaux articules. (Extrait des Bull. Soc. Linn. Brux.) 8vo, 
pp. 19. 
A popular lecture. 
Dewitz, H. Ueber die Fliigelbildung bei Phryganiden und Lepidopteren. 
B. E. Z. XXV. pp. 63-60, pi. iv. figs. 1 & 2. 
The writer traces the development of the wings from their first ap- 
pearance in the young larva as a folded layer of chitin, which gradually 
increases with the development of the insect in such a manner as to 
prove that its outer integument is thrown off at each moult, and that 
there is no difference in this respect between insects with perfect and 
those with imperfect metamorphoses. 
Duncan, P. M. Cassell’s Natural History. London ; 1881, 4to, wood- 
cuts. 
Parts 57-72 include the following entomological matters. Class Insecta : 
Chapter i. Anatomy of Insects, by W. S. Dallas (vol. iv. pp. 281-295); 
chapters ii.-v. Coleoptera, by H. W. Bates (vol. iv. pp. 296-362) ; chap- 
ters vi. (vol. V. pp. 363-381) & vii. (vol. vi. pp. 1-8), Uymmoptera, by 
W. S. Dallas ; chapter viii. Neuroptera, by W. S. Dallas (vol. vi. 
pp. 9-20) ; chapters ix.-xi. Lepidoptera, by W. F. Kirby (vol. vi. 
pp. 21-69) ; chapter xii. Diplera and Aphanipteray by W. S. Dallas 
(commencement, vol. vi. pp. 70-72). 
Eimer. Eine Dipteren- und Libellenwanderung beobachtet in Septem- 
ber, 1880. Biol. Centr. i. pp. 549-558. 
A migration of Melithreptus, sp., EristaliSy sp., and Libellula scotica, 
observed in the Upper Engadine. The insects were travelling in the 
direction of Italy. 
Fletcher, J. On the chief benefits derived by farmers and horticultu- 
rists from a knowledge of Entomology. Rep. E. Soc. Ont. 1880, 
pp. 57-68, figs. 44-64. 
Includes a brief notice of the principal groups of Insects. 
