272 Miscellaneous. 



is deficient on the posterior margin. The pronotum is very feebly 

 developed, the rnesonotum is rather longer, and the metanotum ex- 

 ceeds in length both the preceding taken together. 



In the organization of the pleura? and of the wing-like scales of 

 the metathorax no particular deviations from the typical forms are 

 to be observed. The formula of the tarsus of the anterior legs is 

 4:3:1:2:5; that of the intermediate legs is the same ; in the 

 posterior tarsi the formula is 4 : 3 : 2 : 1 : 5. 



The coxae of the intermediate legs are more developed than those 

 of the anterior pair, and those of the posterior legs are still more 

 developed. Between the metanotum and the dorsal plate of the first 

 abdominal segment there is a quadrangular chitinous plate without 

 hairs, which may perhaps represent the rudiment of an additional 

 abdominal segment. The first abdominal segment is represented by 

 a quadrangular dorsal plate. Every following segment, from the 

 second to the seventh inclusive, consists of a dorsal plate, the lower 

 margins of which extend backward in a wing-like process, and of 

 two ventral plates, which are united in the middle line. The ven- 

 tral plates are crescentiform, with the convex margin directed 

 forward. 



On the second segment the ventral plates are nearly quadran- 

 gular. The eighth segment has no dorsal plate, and is represented 

 only by two ventral plates, which are of much more considerable 

 size than the preceding ones, and these are separated from each 

 other below. These plates are abo crescentiform, with the con- 

 vexity directed downwards. On the anterior branch of the crescent 

 is placed the stigma of the eighth segment, and on the posterior 

 cne an oval surface, which is densely clothed with hairs. The 

 ninth segment is represented by a dorsal plate, the anterior part of 

 which bears a surface covered with very minute hairs, which stand 

 upon specially circumscribed clear spots ; the hinder part of this 

 plate is entirely without hairs. 



There are also belonging to the ninth segment two ventral quad- 

 rangular plates soldered together in the middle line, and these are 

 covered with small hairs. The anus is situated in the eighth seg- 

 ment in front of its ventral plates. 



In the distribution of the sti<jrnata we observe no deviation, 

 except in the case of the stigma of the eighth segment. Two pairs 

 of small stigmata are placed upon the pro- and mesothorax, one 

 pair of similar small stigmata upon the ventral plates of the eighth 

 segment. Upon the wing-like scales of the metathorax and upon 

 the anterior lower angles of the dorsal plates of segments 2-7 of 

 the abdomen there are stigmata of considerable size beset with 

 small hairs at the margins. 



With respect to the clothing of hairs and setae the following is 

 to be remarked. On the lower surface of the head there are no 

 spines, and the crest of spines on the pronotum is also deficient. 

 On the head the hairs are situated in front of the eyes and behind 

 the antennal pits. On each side of the mouth there is a seta. 



