150 ERNEST HILL AND L. G. HAYDON. 



wlien mature, has a sturdy appearance, but when immature 

 looks slender, in part due to deficiency of pigment at the 

 sides, a feature commonly retained throughout in captivity. 

 The full-grown larva is generally richly pigmented in its entire 

 breadth, and exhibits greater colour variations than any 

 other ; many specimens are dense black, others brown, brick- 

 red, vellow, green, and even occasionally cobalt. It does not 

 thrive in captivity, and, although living for many weeks, 

 grows very little, and seldom, if not nearly full-grown at time 

 of capture, undergoes metamorphosis to pupa. A feature in 

 its behaviour is quiet submission to microscopic examination, 

 a treatment commonly resented by other species. 



Antenna. — A multibranched plumose hair on intero- 

 anterior aspect of shaft, about one third of distance from 

 origin. The number of divisions was eight in eleven of 

 thirteen counted, but in one specimen ten were counted on 

 one side and eleven on the other. (This specimen also ex- 

 hibited a peculiar hair on the first abdominal segment). 

 Terminal spines equal, and the hair commonly divides into 

 six, but of seven counted eight were found in two and ten in 

 one, and the number was not constantly symmetrical. 



Frontal hairs. — Three pairs. Anterior (PI. XXII, 

 figs, a, d) constant in all specimens, only slight modifications 

 in the branching of the dendriform being observed. Pos- 

 terior pair very small and difficult to distinguish, and 

 exhibiting variation (PL XXII, fig. a). 



Thorax. — Median hairs overlapping the occiput, Avhich 

 are constant in tlie other species which we describe, are 

 absent from this. 



Palmate hairs. — Rudimentary but large on thorax 

 (PI. XXII, fig. c), smaller and still rudimentary in character, 

 though stronger, on first and second abdominal segments, 

 well developed and with definite notching on third to seventh 

 segments inclusive (Pis. XXII, h, XXIV, li). Average radius, 

 0'116 mm. There is no filament, but a jagged lanceolate ter- 

 mination of characteristic, pattern. This is not observed in 

 rudimentary hairs on thorax and first two abdominal seg- 



