NOTHRUS SPINIGER. 499 



Legs thick, broad, flattened, rough. Hind pair 

 scarcely passing the posterior margin, most joints 

 of the legs slightly increasing towa.rd the distal 

 end. Tarsi with the usual fine hairs. Each of the 

 other joints has very thick, sharply curved hairs of 

 moderate length ; there are usually four on the outside 

 of the third coxa, three to five on the outside and 

 one to four on the inside of each femur ; one or two on 

 each genual and tibia, except the inside of the fourth ; 

 three or four on each side of each tarsus, and one on 

 the top of almost every joint. Glaivs tridactyle. 



Abdomen oblong. The progaster and the lateral 

 margins are raised ; the hind margin, slightly and 

 sharply depressed, leaving a raised curved ridge form- 

 ing the anterior margin of the depression. The central 

 portion of the abdomen (along the median line) also 

 has a tendency to be slightly raised, but not regularly 

 so ; it is broken by shallow depressions, so as to form 

 several ill-defined swellings, which, however, seldom 

 attain the level of the lateral edge. Along the pro- 

 gaster are three pairs of stout curved hairs or spines ; 

 the exterior pair are the most sharply curved ; each 

 hair crosses its fellow of the same pair from the oppo- 

 site side ; these hairs spring from short apophyses and 

 are covered with villous processes. Along each lateral 

 margin are placed five long, slightly recurved chitinous 

 apophyses, which project far beyond the margin; each 

 one terminates in a very long and stout recurved hair 

 or spine, more or less flexible, and with villous pro- 

 cesses in perfect specimens : these apophyses are placed, 

 one at the antero-lateral angle, two close together near 

 the postero-lateral angle, and two about equidistant 

 from the angles and each other. At the actual postero- 

 lateral angle is a large projection, somewhat bulbous 

 in form, terminating in a straight chitinous projection, 

 or apophysis, with a large, straight, terminal spine ; 

 from the inner side of this projection, just at its junc- 

 tion with the hind margin, springs another chitinous 

 apophysis with a stout, terminal, curved spine. There is 



