424 Mr. W. J. Kaye's Notes on the dominant Mullerian 



one of the forms shows signs of forming the rounded 

 shape of the black patch conforming to that of Melinasa 

 crameri, yet I have six If. numata from the Demerara River, 

 and two or three from much lower down the Essequibo, 

 viz. Rockstone and Bartica, which show this in a remark- 

 able way. Two in particular show a great extension of 

 the black inwards about the cell, a phase of variation 

 unknown to me from the Potaro. 



The other two species of Heliconms, viz. H. vetustus 

 and JI. silvana, have occurred quite sparingly, the latter 

 especially so. JI. vetustus is here a comparatively constant 

 species, and in the eight specimens secured the black area 

 in the hind-wing is never divided by the ground colour. 

 The only variation of the black area is that in some 

 individuals the black extends nearer the costa, basally 

 giving the appearance of a rounded area, while in others 

 the black area stops short by quite a horizontal line. 



Hcliconms vetustus. 

 The eight specimens divide up thus : — 



-rj "\ \ Black area sharply cut off . 2 = 25 % 



•PP ' ( Black area extended upwards 6 = 75 % 



■TT q "[ \ Black area divided . . . . 2 = 25 % 

 \ Black area undivided . . . 6 = 75 % 



The latter with the rounded black area agree very 

 closely with some of the H. oiumata, especially those 

 (6 % only) in which the black is undivided by the 

 ground colour. But in the case of those that are almost 

 undivided the shape is the same giving an agreement of 

 another 27 %, or 33 ^ in all of the H. numata with this 

 more usual lorm of H. vetustus. 



A study of the red sub-apical patches in the fore-wing 

 gives the following interesting result : — 



Upper-side of fore-wing without red markings before apex 8 = 100 % 

 Upper-side ,, with „ ,, O = 



Under-side of fore-wing without red markings before apex 7 = 88 % 

 Under-side „ with „ „ 1 = 12 % 



