82 Proceedings of the Royal Physical Society. 



Mesonotum — 2 rows : 



(«) Irregular antemedian of fine hairs ; 

 (b) Post median of long bristles ; 

 and also (c) A row of slender spines posteriorly. 

 Metanotum — Post median irregular row of hairs followed by a row of 

 long bristles above the internal incrassation. The metanotuni bears 

 also 6 broad, blunt teeth, while tergites 1-3 may have from 4-7 such 

 teeth. Tergite 4 usually bears 4 but may have less. 

 Epimeron — 4 or 5 bristles (1, 2, 1 or 2, 2, 1). 



Abdomen — 



Tergites — 1st tergite in both sexes with 3 rows, with (in one ? only ) 

 additional bristles in front. 



Tergites 2-7 ( $ and $ ), an anterior row of short hairs or fine 

 bristles and a posterior of stouter bristles. In the % , tergite 7 bears 

 an extra row of short bristles before the normal two, while tergites 

 5 and 6 show indications of this increase also. In both sexes 

 tergite 7 bears on each side one long (" antepygidial") bristle 

 accompanied by one fine hair ( £ ) or bristle ( $ ). 



Stemites — 

 $ — From the second to the sixth inclusive the sternites bear 1-3 



bristles on each side, while the seventh has constantly 1. 

 ? — Steinites two to six have on each side the following bristles — 2, 5, 



6, 6, 8. One of the $ $ shows on one side of the 5th sternite two 



minute extra bristles. 

 The 7th sternite is produced into a short, broad lobe, abruptly 



truncated above but with the lower angle more rounded (see Fig. 



2). It bears many bristles, there being over 20 on each half. 



These bristles form two fairly well-defined rows of about 7 each (a 



median and a postmedian row), while anteriorly the others are more 



irregularly placed. 

 In general the $ is more densely clothed with bristles or hairs than 



is the $ . 



Modified Segments — 



$ — The 8th tergite bears on its upper edge, which is level, 10 

 straight bristles. There are also on its external surface about a 

 dozen more, distributed fairly evenly over the dorsal and ventral 

 areas respectively (Fig. 3). The corresponding sternite articulates 

 by a narrow apophysis. Distally it bears six (3, 3) long curved 

 bristles. On pressure it is seen to be joined to the parts above by 



