130 EENEST HILL AND L. G. HAYDON. 



The Larva (PL XV). — The species was determined from 

 over thirty specimens which were examined and identified 

 alive, and all subsequently emerged as the same species. The 

 drawing's were made from a comparison of twelve specimens. 



There are no structural differences between the larva of 

 the large and small variety, but there is an appreciable 

 difference in size. It is small, short, and appears rather 

 broad for its length. When about one third of growth is 

 attained, there is generally observable a brown central strip, 

 while the sides are translucent ; this appearance is retained 

 to the time of pupation, if the larva is reared in captivity, 

 but larvre of the small variety, when full-grown or nearly so 

 at time of collection, are commonly deeply pigmented, fre- 

 quently quite black, whereas the larger are pale like younger 

 specimens. This is probably attributable tt) character of food. 



Antenna. — No branched hair on shaft, terminal spines 

 equal, and between them a hair, which divides into three 

 branches, generally, though four have been observed. 



Frontal hairs. — Three pairs. Anterior constant in all 

 specimens examined; posterior pair long and prominent, and 

 subject to much variation (PL XV, fig. a). In one instance 

 in a live larva four branches were observed on one hair. 



Palmate hairs. — On thorax and first seven abdominal 

 segments ; on thorax of good size but rudimentary in shape 

 (fig. c) ; on first abdominal intermediate ; on other segments 

 well developed and defined (fig. h, and PL XXIV, fig. a). 

 Eadius, 0*127 mm. to 0"138 mm. ; relation of length of 

 filament to total length of leaflet, including filament, fairly 

 constant in any particular batch, varies considerably in 

 different batches; extreme average of leaflets of individual 

 specimens as 0*28 to 0'38 to one, and extremes of individual 

 leaflets as from 0*22 to 0*45 to one. The larva is, never- 

 theless, readily distinguished from others described in this 

 paper, by the general character of palmate hairs, position in 

 which they occur, and above all by the features of posterior 

 frontal; both are quite distinct from those of Nyssor- 

 hynchus pretoriensis (PL XIX, figs, a, h), and the former 



