( Txaaa ) 
not usually found together. When on the wing out of the 
sun the clear-winged species were difficult to see, only the 
white or yellow markings catching the eye, but in the 
sunshine the clear parts of the wings sometimes gave an 
iridescent gleam. 
CoNVERGENT GROUP OF HELICONINE Burrerriies.—Mr. W. J, 
Kaye exhibited a convergent group of Heliconine butterflies, 
from the Potaro Road, Potaro River, British Guiana, composed 
of the following species: Heliconius burneyt catharine, Heliconius 
xanthocles xanthocles, Heliconius axde astydamia, Heliconius 
egeria egeria, all of the second section or Opisorhyparine group. 
Heliconius cybele tumatumari of the first section or Opiso- 
gymui group, and Hweides tales tales. A short series of each 
was shown, and it was stated that except the first and last 
none of the species could be called common. ‘The numbers of 
each secured in six years were as follows—H. catharine 31, 
Hi, xanthocles 6, H. astydamia 14, H. egeria 3, H. tumatuwmari 
6, Zu. tales 50. It was significant that this group of butter- 
flies also had a black hind-wing, a characteristic so marked in 
the Guiana region especially that portion known as British 
and Dutch territory. In the more southern area known as 
French Guiana the hind-wing in the representatives of these 
species was streaked with red. Only H. egeria as found on 
the Potaro River now shows any indication of being streaked 
in the hind-wing, the other four species of Heliconius and the 
Eueides only exhibiting a small red streak at the base, while 
some of the specimens present a uniform black surface. 
Hitherto there has not been detected any species of Danaine 
or Ithomiine butterfly that might serve as a model or mimic 
of these species, and if at any time the large Melinxa mneme— 
Heliconius numata group exerted any influence on these red 
and yellow and black species, it is unlikely that it does so 
now, because they have not the same flower-frequenting habit 
and are not found in company with them. The red colouring 
of the fore-wing also render these species far more distinctive 
on the wing than the species coloured like H. nwmata, and it 
is unlikely that any enemy would mistake the one for the 
other. 
