218 BRITISH TYUOGLYPHIDJ]. 



against it. They are rather broad blades on edge, and 

 curve downward at the end, forming short blunt hooks. 

 The under edge is not straight, but forms two convex 

 lobes ; the curved edge of the distal (anterior) of these 

 bears a close series of extremely fine short ridges; 

 these are Kramer's teeth; they scarcely project and 

 can only be seen with a highish amplification and care- 

 ful illumination. The palpi (PI. IV, fig. 7) bear the 

 usual two flagella; the anterior of these is nearly 

 twice as long as the free portion of the palpus ; the 

 hinder is about half the length of the anterior one; 

 there is also a third hair, much smaller, on the distal 

 joint of the palpus behind the smaller flagellum. Mem- 

 branous expansion of the palpus wide and running 

 out into a lateral point. There are a pair of short seti- 

 form hairs, near together, just behind the epistome 

 pointing forward ; also a long pair a trifle further back 

 and further apart pointing backward, and extending a 

 short distance over the abdomen. The abdomen has a 

 pair of mammillary processes on its lateral edge just be- 

 hind its line of demarcation from the cephalothorax, 

 bearing long curved spines standing laterally outward. 

 Behind these are three pairs of large spines of clear 

 chitin, almost horizontal and pointing backward and 

 slightly outward; they are raised on low, somewhat 

 chitinized, dark-coloured papillae placed within the 

 lateral margin. 



These spines (Plate III, figs. 15, 16) are the great 

 characteristic of the species. Kramer describes them as 

 ensif orm ; this is true if the outline only be considered, 

 which is rather doubly curved, like a sword-bayonet ; it 

 must not, however, be understood in the sense that they 

 are flat; they are large, stiff, thick spines of clear, colour- 

 less chitin, and are quite hollow; they vary a little in form, 

 are either sharp-pointed or round-ended, and are some- 

 what suddenly enlarged at their proximal ends, where 

 they are set into the papillae. This end of the spine is 

 flat below and convex on its upper surface. The flat 

 under surface runs a considerable distance down the 



