(ava, 
H. microclea of Group II. Many parallel cases in unrelated 
groups are known to exist, and this negative evidence is no 
proof that these Heliconians are not mimics one of the other. 
It is quite possible that in some, perhaps in the majority 
of localities, members of one group are always more dominant 
than in the other. It is also possible that perhaps the exact 
times of appearance do not quite coincide, and that when the 
collector is taking one species abundantly the other is not 
fully out and vice versa. In addition to the species already 
mentioned the following were also exhibited :—H. vulcanus 
cythera with ab. modesta, and H. vuleanus pyrforus * of Group 
I, H. amphitrite and H. favorinus of Group II, 
The series exhibited is also to show (2) how Herr Riffarth, and 
later with the collaboration of Herr Stichel in the “‘ Tierreich ” 
for 1905, derives the melpomene-like forms of several species 
from an amaryllis-like form with a yellow transverse band on 
the hind-wings, the system being based on the shape of the 
red blotch on the fore-wings in conjunction with the main group 
character. In the series of 1. amaryllis were shown two of 
its sub-species, viz. rostna from Colombia and euryades from 
Trinidad, and one of the rare intermediates named euwryas by 
Riffarth in which the yellow band is almost but not entirely 
obliterated. 
MicromorPHismM IN CoLEopreRAm— Mr. W. E. Sarre 
showed a small collection of Coleoptera to illustrate the 
tendency of some species to micromorphism, and gave an 
account of the causes of which these small forms were the 
result. 
The exhibition included specimens of Brachinus crepitans, 
Necrophorus mortuorum, Nacerdes melanura, Meloé proscara- 
beus, Pissodes notatus, Phyllobius argentatus, Leiopus nebu- 
losus, and Aleochara cuniculorum. And remarking upon 
* Heliconius vulcanus, sub-sp. pyrforus, n. sub-sp. 
Fore-wing with a strong slaty-blue gloss, more so than in H. vulcanus 
vulcanus but less than in H. vuleanus cythera. The red blotch across the 
centre of the wing very large. Cilia white spotted. _Hind-wing without 
markings. Cilia white spotted. Under-side of hind-wing without any 
trace of a yellow transverse band. 
Hab. TuMATuMARI, b. Guiana. 
The sub-species is very like H. erato guarica = magnifica, Riff., except 
for the white spotted fringe. 
