of this kind of resemblance we mention the following few cases : 
One of the females of the Philippine Papilio rumanzovia ESCHSCH. 
(1821) bears along the abdominal margin of the hindwing a bright 
red stripe which recalls the red abdomen of Papilio semperi 
FELD. (1861). The same phenomenon is observed in two American 
Butterflies, Gnathotriche epione GODM. and SALV. (1878) with a 
red abdominal wing-margin and Actinote neleus LATR. (1811) 
with a red abdomen. Papilio laglaizei DÉPUIS. (1877) has an 
orange patch on the underside of the hindwing, which corresponds 
to a conspicuous orange patch situated on the underside of the abdo- 
men of A/cidis agathyrsus KIRSCH (1877), which closely resembles 
Papilio laglaizei on the upperside. The long antenna of certain 
wasp-like Beetles and Orthoptera are black proximally and pale 
distally, the pale tip giving them the appearance of being short, like 
the antenna of the Wasps. Certain stick-insects, when disturbed, 
stretch the forelegs straight forward with the head and antenna 
lying between them, poise the body on the mid- and hindlegs and 
open the claspers, the Insect in this attitude looking uncommonly 
like a Lizard. And so on. Theorists, with the exception of those 
who hold to natural selection as a force in evolution, reject these 
similarities as mere accidents or analogies which as such do not 
require an explanation. The cases of false similarity are, however, 
far too numerous to be considered in the same spirit as the apple- 
peel which the maiden throws over her left shoulder. 
The species which exhibit genuine (or homologous) agreement 
with other species may be grouped for our purpose in two 
sections : 
I. A species resembles one other species : Æ/omotrope resem- 
blance; 
2. A species resembles several diverse species : Heterotrope 
resemblance. 
Although Dr. DIXEY has shown us so many beautiful slides 
illustrative of his address on Mimicry, our first slide depicting four 
specimens of Planema and four of Pseudacrwa may not have lost 
its interest, it being among Butterflies one of the most startling 
cases of resemblance of which I know. The eight specimens 
represent four species, one species of each genus having the sexes 
practically alike, while the other species has them unlike (see 
