NOTASPIS SIMILIS. 363 



progaster undulated, but not so strongly as in N. exilis. 

 The antero-lateral corners 'project very much hid do not 

 stand out so sharply or suddenly as in N. exilis ; tlie pro- 

 jection is carried further back. There is a row of 

 very fine curved hairs round the margin, and two rows 

 of similar hairs on the notogaster. Genital and anal 

 plates at opposite extremities of the sternal plate ; the 

 former small, pentagonal with the point forward ; the 

 latter large and almost square. 



Nymph. 



I have bred this species, but it is so extremely 

 difficult to distinguish the nymph from that of N. exilis 

 that I refrain from describing it as I did not succeed 

 in breeding the actual specimen which I had drawn 

 and described. 



Distribution. — Generally distributed; chiefly found 

 in moss and dead leaves; it has been recorded in 

 France and Germany. 



NoTASPis SIMILIS,* sp. nov. PI. XXXI, figs. 9—12. 



Average length about "55 mm. 



Average breadth about 'SS mm. 



Average length of legs (first pair) about '22 mm. 



Average length of legs (second pair) about '19 mm. 



Average length of legs (third pair) about -17 mm. 



Average length of legs (fourth pair) about "25 mm. 



I doubt whether it would be possible to distinguish 

 this species from N. tibialis were it not for the mono- 

 dactyle claw, although similis is usually a trifle larger 

 (but they both vary considerably in size), and it has a 

 more marked undulation below the antero-lateral corner 

 of the abdomen. 



* Similis, like. 



