INSI3CTA. 
201: 
among animals. Westminster Review, New Series, voL 
xxxii. pp. 1-43. 
In this admirable memoir the author brings together an im- 
mense number of facts demonstrating the occurrence of ‘mime- 
tic resemblances in animals of various groups either to each 
other or to other natural objects. The entomological portion 
of this evidence is by far the strongest and most interesting ; but, 
from the brevity with which it is put forward, no satisfactory 
analysis of the au thorns statements is possible here. In most 
cases the author regards the resemblances described by him as 
serving for the protection of the Insects ; and the whole subject 
is, of course, treated from a Darwinian point of view. 
Walsh, B. D. On the Insects, Coleopterous, Hymenopterous, 
and Dipterous, inhabiting the Galls of certain species of 
Willow. Proc. Ent. Soc. Philad. vol. vi. pp. 223-288 : 
1866-1867. 
This paper contains descriptions of numerous new speeies, and 
remarks upon various points in the strueture of Insects. 
b. Anatomical and Physiological, 
Dujardin, F. Memoire sur les yeux simples ou stemmates des 
Animaux articules, Annales Sci. Nat. 5™® ser. tome vii. 
pp. 104-112. 
Landois, H. Die Ton- und Stimmapparate der Insecten in 
anatomiseh-physiologischer und akustischer Beziehung. 
Zeitschrift fiir wiss. Zoologie, Band xvii. pp. 105-184, 
pis. 10, 11. 
An elaborate memoir on the sounds emitted by Insects of 
various orders, and on the means by which they are produced. 
Brief notices of the species referred to will be given under the 
separate orders. 
^ Landois, H., & Thelen, W. Der Tracheenverschluss bei (Jen 
Insecten. Ibid. pp. 187-214, pi. 12. 
A description of the means by which the trachese of Insects 
are closed. The apparatus consists in general, according to the 
authors, of the following parts — A chitinous bow occupying 
and extending one side of the trachea, a chitinous band occupy- 
ing the other side, and one or more eones or levers appended to 
the latter, and acted upon by a muscle in such a way as to press 
the band towards the bow. The authors also notice the effects 
of partially stopping the access of air to the trachese. The 
apparatus above mentioned is described in various forms as pre- 
sented by Insects of different orders, and is figured from the 
following species : — Meloe proscar abceus, Melolontha vulgaris ^ 
Hydrophilus piceuSj Lamia textor, Lucanus cervus, Pier is rapes y 
