a collection of Heliconine forms from French Guiana. 425 



H. silvana ; there are a pair of this species, rather heavily 

 marked with black, but otherwise typical. 



H. numata, Cram. ; the material in this species is curiously 

 limited to six specimens, but they are of great interest. 

 One is nearly typical numata; two are ab. melanops, Riff. ; 

 one is ab. mavors, and two are of an undescribed uni- 

 colorous form, analogous to mavors but with a heavy 

 undivided black hind-wing like melanops. For this 

 interesting form we propose the name melanopors, nov. 

 The occurrence of these unicolorous forms in Cayenne is 

 exceedingly interesting, and makes one wonder if there is 

 any possibility of the Peruvian aristiona, in its varying 

 phases, being a form only of numata. 



Heliconine Species in the Collection of Group II. 



Of the remainder of the Heliconius in the collection 

 there are the following : — 



Heliconius egeria egeria, Cram., five fine perfectly typical 

 examples. 



H. xanthocles vala, Stgr. ; six specimens, all $, as is so 

 frequently the case in all the races of this species. One of 

 these specimens is remarkable on the underside. It has 

 all the red streaks greatly widened, and almost touching 

 the veins alone separating them. At the margins of the 

 rays there is a considerable amount of black suffusion, 

 giving the streaks the appearance of feathers. Above, the 

 specimen is normal, except for a pale whitish area just 

 below the median within the red area. 



H. antiochus alba, Riff.; nine specimens, all somewhat 

 intermediate between alba and typical antiochus, but 

 certainly nearer alba. 



H. doris; nine specimens. Six of the delila form; one 

 a delila but heavily suffused with black, and two of the 

 amathusia type, being really of the metharmina type with 

 three in one case, or four red streaks running through. 



H. aoede aoede; one small male specimen with rather 

 slender hind-wing streaking. In view of the large number 

 of melpotnene forms with slender hind- wing streaking, it 

 must be presumed that the influence extends to H. aoede, 

 which is very much scarcer, and that it is, therefore, a 

 mimic of H. melpomene thelxiopeia. 



In comparison with the very large number of meljpomene 

 specimens the number of erato forms is small, being only 



TRANS. ENT. SOC, LOND. 1916.— PARTS III, IV. (APRIL '17) FF 



