TITLES. 
Ins. 31 
observations extends to 99 chapters, the student must refer to the work 
itself for further information. The plates are figures made by means 
of projections on a screen, the variations in shape and the nature of 
the changes being indicated by means of projecting pieces of paper 
attached to different parts of the body. 
250. [Plateau, F.] Recherches experimentales sur la vision chez les 
Insectes. Les Insectes distinguent-ils la forme des objets ? Bull. 
Ac. Belg.(3) x. pp. 231-250. 
This is a preliminary communication of observations and experiments 
made to determine this question. The method was the liberation of 
insects in a darkened room with one or more orifices to admit light. 
Insects used w r ere two Diptera, Callipliora vomitorict, Eristalis tenax , 
and two Butterflies, Vanessa urticce and Pieris napi. 
251. -. Experiences sur le role des palpes chez les Arthropodes 
maxilles. Premiere partie : Palpes des insectes broyeurs. Bull. 
Soc. Zool. x. pp. 67-90. 
The observations relate to Coleoptera, Cicincleliclce , Carabiclce, and 
Dytiscidce , Staphylinus , Geotrupes, and a few Orthoptera. The insects 
were under observation when intact, and after being deprived partially 
or completely of their palpi. The following are the conclusions : 
1, During mastication the labial and maxillary palpi are inactive ; 2, the 
suppression of the maxillary palpi does not hinder the insects from 
eating in the normal manner; 3, it is quite the same after suppression of 
the labial palpi; 4, amputation of the four palpi does not destroy the 
sense of smell; 5, ablation of the four palpi does not in any way hinder 
the recognition and prehension of nutriment ; 6, in spite of the sup¬ 
pression of the four palpi, the insects eat in a perfectly normal rnauner. 
252. Plotz, Cael. Neue Hesperiden des indischen Archipels und Ost- 
Africas. \_Lepidoptera.~\ B. E. Z. xxix. pp. 225-232. 
36 species. 
253. P ortschinsky, I. Lepidopterorum Rossiae biologia. i. Drepanu- 
lidce, Cymatophoridce, Noctuce (partim). Hor. Ent. Ross. xix. 
pp. 50-97, pi. x. 
This paper is in Russian, as is also the explanation of the plate, this 
being devoted chiefly to larvae. The paper contains apparently obser¬ 
vations on mimicry, and a list of Hymcnoptera parasitic? on certain 
species of Lepidoptera (p. 61). 
254. -. Muscarum cadaverinarum stercorariumque biologia com- 
parata. T. c. pp. 210-244, woodcuts in text. 
Entirely in Russian. 
Poujade, G. A. [See Lefevre.] 
255. Poulton, E. B. The Essential Nature of the Colouring of Phyto¬ 
phagous Larvae (and their Pupae) ; with an Account of some Experi¬ 
ments upon the Relation between the Colour of such Larvae and that 
of their Food-plants. P. R. Soc. xxxviii. pp. 269-315, with a chart 
of spectra of blood of larvae and pupae. 
This paper contains the results of a large amount of careful 
