THE GENERAL SUBJECT. 
Ins. 7 
order, with instructions for collecting, notices of the principal works on - 
European species, and a sketch of the principal families. The second 
volume treats of the orders Coleoptera and Hymenoptera in greater detail, 
and full accounts are given of all the commonest and most remarkable 
species. The work contains a large amount of important Entomological 
information in a very small compass. 
Taschenberg, O. Farbung der Thiere als natlirliches Schutzmittel 
gegen ihre Feinde. Z. ges. Nat. (3) iv. pp. 408-420. 
The latter part of this paper relates to protective mimicry in Insects. 
Underhill, H. M. J. The Preparation of Insects for Microscopical 
Examination. Sci. Goss. xv. pp. 101-103, 121 & 122. 
Wagner, N. Sur la structure des ganglions c^phaliques des Insectes. 
C. R. Ixxxix. pp. 378 & 379. 
Of the two pairs of ganglions in the heads of Insects, the hinder pair 
chiefly regulates the mouth and its appendages, and the front pair forms 
the seat of intelligence. Towards the centres of the front ganglions are 
three groups of small cellules arranged in layers, and communicating by 
numerous nervous fibres. The groups situated before the others are inti- 
mately connected with the circumvolutions, or horse-shoe shaped organs, 
in the social Hymenoptera^ and are developed in proportion to their 
intelligence. They are most developed in worker ants, next in worker 
bees ; while they are less developed in the females, and are rudimentary 
in the males. The sides of the ganglions are produced into lobes con- 
nected with the large compound eyes. 
Wallace, A. R. The Protective Colours of Animals. Science for All, 
1879, pp. 138-157, woodcuts. 
. Protective Mimicry in Animals. L. c. pp. 284-296, woodcuts. 
Popular essays, much of which relates to Insects, especially Lepido- 
ptera. 
Watson, F. On Indian Wheat. (Parliamentary Report; cf. E. A. 
Fitch, Ent. xii. p. 292.) 
Westwood, J. O. On some Unusual Monstrous Insects. Tr. E. Soc. 
1879, pp. 219- 228, pis. vi. & vii. 
The author describes and figures 3 butterflies, with supplemental wings 
or portions of wings, and various Coleoptera, Lepidoptera, and Diptera in 
which the head of the larva or pupa has been retained in the imago 
state. 
Wood-Mason, J. Morphological Notes bearing on the Origin of Insects. 
Tr. E. Soc. 1879, pp. 143-167, woodcuts. 
The antennse of Machilis appear to be homologous with the antennse 
proper of Crustacea. These, as well as those of an Indian Lepisma, lead 
to the biramose antennae of Pauropus in the Myriopoda, and to those of 
Cyclops, or the various larval forms of Crustacea. Rudiments of a second 
antennal branch likewise exist in ripe embryos of Blatta {Pancesthia) 
javanica, thus lending support to the opinion that the Blattidce are 
