V22 Br. T. A. Chapman on 



larva is similar to the very palest that occur in //. 'pcnclla, 

 iu which the larva varies much in coloration. It con- 

 trasts strongly with the much darker and unvarying larva 

 of hcjarensis, and with the palest forms of the dark, but less 

 constant larva o^ inedraliitie. The dorsal line is extremely 

 slender, the subdorsal yellow is very wide, the subdorsal 

 and spiracular black lines are slight and hardly connected 

 together at all. The yellow is brigiit lemon colour, with 

 no greenish suffusion from intrusions of dark spots from 

 the black. The male moth is, as I have already referred to, 

 more retiring in its resting habits than lejarcnsis. The 

 pupa is, however, much more retiring. The number of 

 males taken showed that the species must be at least 

 quite as abundant as hcjarensis is, yet only three or four 

 (all injured) female cocoons were seen, and only one male 

 one. 



Piedrahit/v is larger than the other forms, chiefly by 

 being of a more uniform size, and with few small and no 

 very small specimens, ranging from 24 — 26 m.m., and 

 averaging over 25 m.m. in e.x'panse. It has not the pale 

 colouring they have, but it is a comparatively dense black. 

 The food-plant is apparently the same as that of candclarhv. 

 The larva is close to that of hejarensis in colouring, it 

 varies more than they do, some specimens being almost 

 identical with those of hcjarensis, but none at all so pale as 

 candelariiv. The male imago has precisely the same 

 habits as that of hcjarensis, but in the matter of pupation 

 it is closer to 23<^'>iclla than to either of the other forms, ^ 

 cocoons being abundant and male cocoons tolerably 

 numerous, but less so than females (the reverse of 2'>e')icJIa). 

 I had about eight ^ moths from collected cocoons, but 

 the great mass of those I collected produced ichneumons. 

 The healthy male larva therefore hides his cocoon more 

 frequently than not, but does not invariably do so. 



At Piedrahita I frequently met with larvce spinning 

 their cocoons, and found they did so in a very interesting 

 manner, in those cases in which the cocoon was spun not 

 between twigs but on the side of one. Having covered 

 the twig sufficiently with silk, the larva, by successive sei-ios 

 of fine loops of silk, constructs a lace-like veil on either 

 side of the twig, and when these have attained sufficient 

 dimensions draws them together over its back. The 

 process is precisely the same as that adopted by I^ola in 

 spinning its c'ocoon, though Nola uses films of bark 



