164 



PERCY SLADEN TRUST EXPEDITION 



broadened just behind the middle, and is depressed rather abruptly just before its 

 posterior end : the obhque sutures dividing meso- from metasternum appear as rather 

 broad white lines : the surface bears extremely fine short bristles and there are no very 

 long bristles on the hind margin. Legs very long and slender, front coxae over \ the 

 length of the femora. 



$ ABDOMEN (figs. 3, 4) : at the extreme base dorsally is a number of short erect 



Fig. 1. Nycterihia {Acrocholidia) fryeri, sp. nov., 5 , dorsal view. 



bristles marking the hind margin of the true tergite 1. Tergites 2, 3, 4 have their 

 surfaces clothed with short bristles, and their hind margins set with alternating short and 

 moderately long bristles, rather spaced out. Tergites 5 and 6 have their hind margins 

 set with alternating very long and shorter bristles, the very long ones nearest the middle 

 being strongly divergent : tergite 5 has a few short bristles on its surface, tergite 6 has 

 its surface bare. Anal segment rather strongly tapering, its breadth at the apex a little 

 less than ^ that at the base ; in fig. 3 its length appears about equal to its breadth at the 



