ill the British Museum. 219 



half, tlic segments subcylindrical, the fourteenth segment 

 (? apical) tlic same size as tlie thirteenth, truncate and hollowed 

 distally. 



Frehasal plate visible ; hasal plate as wide posteriorly as 

 the niaxillipedes, its sides strongly converging, its anterior 

 border lightly concave. 



Muxillari/ coxcv punctured, wider than long, narrowed 

 at the antcro-latcral angles, without chitinous lines, the ante- 

 rior border feebly excised ; the pleurce seen from below large ; 

 feet punctured, short, stout, largely overlapping the head at 

 the sides, but only attaining the frontal border, unarmed 

 internally. 



Terijites^ except at the anterior and posterior ends of the 

 body, bisulcate, smooth, at most ligiitly wrinkled and punc- 

 tured ; prescuta a little narrower than the tergites ; pleural 

 prescuta large, larger than the tracheal sclerites, which are 

 in contact with the tergites. 



Sternites punctured, with a median longitudinal impression, 

 without defined porous area. 



Anal somite. — Tergite narrowed behind, not covering the 

 pleurte ; pleuroi without pores above in their posterior half 

 and below along their free margin, the rest of the surface 

 furnished with many (about forty) round pores ; sternite 

 narrow, twice as wide in front as behind, with the margins 

 lightly convex in front ; prosternal plates visible ; legs pubes- 

 cent, short, a little longer than the preceding pair, composed 

 of six segments, unarmed, stout in the male. Anal pores 

 visible. 



Number of pairs of legs G9. 



Length 73 raillim. 



A single specimen from Samarkand. 



In the structure of its head this species presents some 

 resemblance to G. car^jophagus^ Leach { = sodalisj Mein., 

 condy log aster ^ Latz.), which is common in Europe; but 

 the head in G. parthorum is narrower. Moreover the anal 

 somite is very different. The antennse of the specimen 

 described appear to be imperfect, although they are composed 

 of 14 segments. 



Geojhilus sydneyensis, sp. n. (PI. XII. figs. 5, 5 a and b.) 



Colour ochraceous throughout. 



Body nearly parallel-sided, sparsely hirsute. 



Head convex from side to side, a little longer than wide, 

 with convex sides and straight posterior margin, wider in 

 front than behind ; frontal plate indistinctly defined. 



