sets, an anterior and posterior, with a slight interval between them, in 

 both also the bases of the special angular hairs of the prothoracic plate 

 are evident, but the hairs themselves are invisible, possibly lost, probably 

 too slender and transparent to be seen. 



Fig. 7, Plate VII, represents a specimen that I take to be in the last 

 instar. The hair-bases are very well seen, but the dorsal hairs are matted 

 down and very transparent, so that, except that they are very much like 

 th'-se of the previous instars, but longer and more numerous, no details 

 can be confidently described. The lenticles are not quite so numerous, 

 l)ut some very large — the lateral hairs are very long, 0"6-0'7 mm. in 

 length. The honey-gland here, as in 3rd and 4th instars, has several large 

 lenticles round each end, but across the dorsal space dorsal hairs are 

 absent, nor are there any lenticles, the dorsal tract being without 

 them. 



The position of the fans is a circle, formed by about 14 or 15 hair- 

 bases and about 0'i4 mm. in diameter and the next hair-l)ases below are 

 arranged as parts of a second and third circle ; of course the diameter of 

 this area only applies to this example, as in life it may be tightly 

 closed or fully open, that in the specimen is probably that of the size 

 when the fans are extended. 



The prolegs have 10 to 12 hooks in three sizes in each of the front 

 and back groups. 



Fig. 8, Plate VTII, is the prothorax of this specimen showing the 

 plate, the bases of the special angular hairs are conspicuous. Fio-. 9, 

 Plate IX, shows the last segments, and fig. 10 the honey-gland reo-ion, 

 -f 120, the lenticle and spiculate hair-bases are well seen. The prothoracic 

 hairs are very numerous, long, hardlj^ cmwed, and very finely spiculated. 



A large lenticle is about 0-025 mm. in diameter, it consists of a dark 

 outer circular margin, fringed with very short radiating points, 12 to 15 

 in number, but irregular as to size and distribution, within this circle is 

 a broad zone of pale chitinous aspect, and in the centre a circular area 

 I to I the whole lenticle in diameter, that is pale and minutely and 

 faintly dotted. Some of the lenticles are approximately flat, others have 

 the outer dark circle more or less expanded, conically raising the central 

 portion. The hair-bases are rather smaller than the lenticles, angular 

 and flat, like the lenticles they have a darker border, but this is slight 

 except where it projects in a stellate manner in a variable number of 

 points, seldom more than five. The hairs they carry are verv minute 

 rarely as long as the width of the basal plate. Sometimes the hair is a 



