THE GENERAL SUI5JECT. 
Ins, 235 
ViALLANES, H. Sur I’histologie des muscles de la larve, durant le de- 
veloppement post-embryonnaire des Dipteres. 0. R. xcii. pp. 416-418, 
and Ann. N. H. (5) vii. pp. 352-354. 
The muscles of the larva of Musca vomitoria disappear as it passes into 
the pupa state ; first, by proliferation of the muscular nuclei, which 
give origin to a swarm of embryonic cells, multiplying at the expense 
of the contractile mass : subsequently the muscular nuclei degenerate 
and die, and the contractile substance disappears. 
. Sur le d^veloppemeut post-embryonaire des Dipteres. C. R. xciii. 
pp. 800-802. 
When the larva is about to become a pupa, it returns to an embryonic 
condition, even the skin becoming disintegrated, except a very slender 
cuticle ; and the embryonic cells which it contains are not only derived 
from the muscular nuclei, but also from the proliferation of the cells of 
the adipose tissue. [Kiinckel criticises this paper {op. cit. pp. 901-903), 
and Viallanes replies (1. c. pp. 977 & 978)]. 
Westwood, J. O. Notse Dipterologicae. No, 6. On the minute species 
of Dipterous Insects, especially Muscidce, which attack the different 
kinds of cereal crops. Tr. E. Soc. 1881, pp. 605-626. 
Consists of descriptions of species described by various old authors, 
and remarks by recent authors, with critical observations. The following 
are the principal species referred to : — Cecidomyia tritici, Kirby, destruc- 
tor, Say, Tipula cerealis, Santer, Oscinis frit, Linn., Chlorops saltatrix, 
Linn. (= tamiopus, Meig.), Musca secalis, colamitosa, hordei, velox, tri- 
pimctata, truncata, nivalis, pumilionis, and avenm, of Bjerkander (figured 
by Westwood as Oscinis avence), Oscinis atricilla and pusilla, Zett. ; Te- 
phritis hordei, flavipes, nigra, and pallida, and Leptocera nigra, of Olivier, 
Oscinis lineata, Fabr., Chlorops herpini, Gu4r., Oscinis vastator, and 
granarius, Curt., and Oscinis pusilla, Meig. 
WULP, F. M. Van der. Diptera, in: Midden-Sumatra, Reizen en 
Onderzoekingen der Sumatra-Expeditie, &c. iv. Afleveving 
(Leiden: 1^81, 4to), Natuurlijke Historic, 9<i® Afde^ling, pp. 1-60, 
pis. i.-iii. ' - ^ ' 
Notice of a collection formed by D. D. Veth, consisting of between 
400 and 600 .specimens, representing 122 species, of which a large num- 
ber (all but 78) proved to be new. About 2000 species of Diptera are 
known from the East Indian Archipelago, and a table is given of the 
number in each family. Six of the Sumatran species are European, viz., 
Sciara thomce, L., Glaphyroptera winthemi, Lehm., Syrphiis halteatus. 
Do Geer, Stomoxys calcitrans, L., Musca domestica, L., and M. corvina, 
Fabr. A short bibliography terminates the introductory portion of the 
w’ork. Many known species are discussed in detail, and often rede- 
scribed. 
. Amerikaansche Diptera. Tijdschr. Ent. xxiv. pp. 141-168, pi. xv. 
Includes notes on various known species, besides descriptions of new 
ones. 
