340 Natural History Bulletin. 



covered with granules, except on two spots, one on each side 

 of the middle posteriorly. Just external to this spot is an 

 oblique elevation extending downwards and forwards, while 

 exterior to this is another larger lateral one, bearing on its 

 summit three tubercles. 



Metathorax similar but lacking the two smooth spots. 



Abdomen composed of rings which in dorsal aspect much 

 resemble the metathorax but which are so plicate transversely 

 as to be with difficulty separated from each other. The seg- 

 ments continue of about the same width until the third or 

 fourth is reached, when they decrease to the tip. A prepared 

 skin shows each segment except the last to bear two scutes, 

 a smaller anterior and a larger posterior one.^ All the scutes 

 are covered with tubercles, conspicuous among which are a 

 series of larger ones down the middle of the back, consisting 

 for the greater part of the distance of two tubercles placed 

 one behind the other on each side of each large scute. Lat- 

 erally the segments are longitudinally plicate, and bear each a 

 bristle-tipped tubercle. The under surface of the segments, 

 except the last two, are marked by four transverse ridges, 

 limited on each side by a longitudinal depression outside of a 

 high ridge. 



Legs moderate, coxae large, conical and prominent, femoral 

 piece with a distinct trochanter and longer by a trifle than the 

 coxas. The tibia is shorter than the femur, and the tarsal 

 piece still shorter, being in fact merely a long claw. 



The pupa is white, eyes a light chestnut and a spot on the 

 abdominal dorsum, black. The pronotum is armed at the an- 

 terior margin with a number of long curved bristles — three 

 near each angle and two on each side of the middle; there 

 are also two near each of the posterior angles and several on 

 the disk. The abdomen is armed with stiff bristles placed in 

 rows as follows: two dorsal, one on each side dorso- lateral in 

 immediate proximity to the spiracles, and one lateral just 

 below the spiracles. The tip bears two fleshy curved pro- 



1 Duges considers the larger one anterior. (/. c, p. 9.) 



