THE GENERAL SUBJECT. 213 
difications of the Lepidoptera. Observations on the proportional numbers of 
the sexes in the Insectd occur at p. 309 et seq. Many woodcuts of various 
sexual developments in the different orders are given, and are mostly ori- 
ginal ; and the author’s usual accuracy and earnest endeavour to get at truth, 
independently of theory, are as conspicuous in this collateral branch of his 
argument as in his more pretentious works. 
Dei, Apelle. Utilitk delF Entomologia applicata all’ Agricol- 
tura. Bull. Ent. Ital. iii. pp. 67-80. 
General observations on applied entorgology, more especially referring to 
insect-parasites. 
. Sui danni degli Insetti nelle Campagne Senesi durante 
I’anno 1871. L, c. pp. 360-365. 
Remarks on injuries caused near Sienna by insects. 
Dietze, Carl. Ueber einige Beispiele von Nachahmung bei 
Insecten. S. E. Z. xxxii. pp. 279-284. 
General observations on the similarity of appearance in different species, 
chiefly Lepidoptera. 
Dimmock, George. Catalogue of Coleoptera and Lepidoptera. 
Springfield, Massachusetts : 1871. 
Gerstaeceer, a. Beitrag zur Insektenfauna von Zanzibar. 
Arch. f. Nat. xxxvii. III. pjf. 42-86, 345-349. 
IV. Hymenoptera, pp. 349-357. V. Lepidoptera, pp. 357- 
361. VI. Diptera, pp. 362 & 363. 
Continued from vol. xxxiii. p. 49. Some new genera and many new spp. 
are characterized. 
Glaser, L. Die schadlichen Obst- und Weinstock-insekten und 
die zu deren Vertilgung dienenden Mattel. Darmstadt : 
1871, 8vo, pp. 48, 4 pis. 
Published under the auspices of the Obst- und Weinbau Verein of Darm- 
stadt. A practical treatise. 
Glover, Townend. Report of the Entomologist and Curator 
of the Museum;” in the Report of the Commissioner of 
Agriculture for the year 1870.” Washington ; 1871, 
pp. 65-91, 60 woodcuts. 
A semipopular account of noxious American insects of all orders. 
Koppen, Fr. Th. Einige Falle von Massen-Erscheinen ver- 
schiedener Inseeten, und speziell der Libellen. S. E. Z. 
xxxii. pp. 183-190. 
A brief compilation of accounts of swarms of insects (chiefly Lihellulidce') 
observed since 1494, 
Kowalevski, A. Elmbryologische Studien an Wiirmern und 
Arthropoden, Mem. Petersb. xvi. 12, pp. 70, pis. 12. 
The 2nd part of this excellent treatise consists of accounts of, 1 (pp. 31-44, 
