@ bexyi ) 
which abounds in pregnant suggestion, and indicates with 
justice and clearness how far the evidence forthcoming was 
valid, and in what directions evidence still lacking should be 
sought. 
Wallace well observed (‘‘ Darwinism,” p. 264) that ‘ to 
“set forth adequately the varied and surprising facts of 
‘‘ mimicry would need a large and copiously illustrated 
“volume; and no more interesting subject could be taken 
“up by a naturalist who has access to our great collections 
*“and can devote the necessary time to search out the many 
“examples of mimicry that lie hidden in our museums.”’ 
A work ostensibly of this character was issued in 1892-93, 
in two Parts, from the pen of the late Dr. Erich Haase, 
under the title of ‘‘ Untersuchungen iiber die Mimicry auf 
Grundlage eines natiirlichen Systems der Papilioniden”’ ;* 
and last year an English translation of the second Part was 
published, and has quite recently been reviewed by Prof. 
Poulton.f This treatise is of large quarto size, and the 
first Part contains 120 pages and 6 coloured plates, while the 
second extends to 158 pages and includes 8 coloured plates. 
The first Partt deals solely with the family Papilionide 
(s. str. = subfamily Papilionine) and principally with the 
great genus Papilio (s. lat.), which on grounds of structure, 
system of markings, form of larve and pup, and food- 
plants of larve, is divided into the three subgenera of 
Pharmacophagus, Cosmodesmus, and Papilio (s. str.), With 
the utmost minuteness the species assigned to these groups, 
with their sexual, geographical, or mimetic variations, are 
traced through the four zoological regions recognized by the 
author, and very elaborate analysis of markings is made in 
aid of arriving at their natural affinities from a phylogenetic 
point of view. Haase shows that in Papilio the models 
which are mimicked by other species of that great genus are 
always members of the Pharmacophagus group, or as he calls 
them ‘“ Aristolochia-Butterflies ”»—whose larve feed on that 
tribe of plants, and which, as he contends, derive their 
* Jn Vol. ILL. of Bibliotheca Zoologica (Stuttgart). 
+ “Nature,” 4th and 11th November, 1897. 
{ ‘‘Entwurf eines natiirlichen Systems der Papilioniden.”’ 
