TWO NEW LICE. 



Stage II. — Measurements (millimetre scale). 



265 



Stage III. (Text-%. 12.) — Except in the shape of the head, 

 which is here longer and narrower in front of the antenme, it 

 has been difficult to discover any difference between Stage III. 

 and Stage II. 



Stage III. — Measurements (millimetre scale). 



PoLYPLAX BRACHYRRHYNCHUS. 



In this species only one stage was represented — Stage III. 

 (text-fig. 14). The figure gives an acciu-ate representation of the 

 external form of the insect at this stage. It will be observed 

 that on the abdomen are neither tergites nor sternites, while the 

 pleurites also are either absent or very faint and indefinite. 



The abdominal chsetotaxy presents features of special interest. 

 There are a couple of hairs in the middle area of each tergum 

 and sternum, except the tergum of segment 8, which is bare. 

 The pleura? are bare, with the following exceptions : — Segment 3, 



