54 n. J. HANSEN. 



legs with the anterior claw (fig. 2 h) moderately long and 

 rather curved ; the posterior claw is between half and two 

 thirds as long as the other; the front seta as in the last pair 

 of legs. 



Cerci (fig. 2/). — From a little more than four to five 

 times longer than deep, with the distal part somewhat 

 elongate. They are set with a very moderate unmber of 

 stiff seta?; which increase gradually but considerably in length 

 outwards, and the distal ones arc about as long as the depth 

 of the cerci ; a moderately long distal part is without setae. 

 The terminal area looks upwards or a little outwards as well, 

 and is moderately long. The apical seta as long as one of 

 the distal lateral setae. 



Length. — 2*4 to 4*5 mm. 



Variation. — A very considerable variation in the shape 

 and adornment of the posterior pairs of legs has been 

 described above. But two specimens which I, after some 

 hesitatioUj have referred to this species have not been taken 

 into account in the description above; I have preferred to 

 mention them separately here as Scut, angulosa, vai-. 

 brevicornis, var. nova. Both specimens have been cap- 

 tured in one locality, and they are very similar to each other 

 in all respects. They possess the full number of legs, and 

 one of them measures 3'2 mm. in length, while the other is a 

 little shorter. I will only describe the differences between 

 this variety and the specimens taken as typical. The 

 antenna) contain fifteen and sixteen joints; the secondary 

 whorl (fig. o a) begins both below and above on the fifth 

 joint; the terminal joint differs as to the sense-organs; on 

 the part visible from the exterior side (fig. 3 h) it has a pair 

 of styliform setce, a rather large subglobular organ without 

 stripes, and three striped organs, the largest of which is 

 rather small with a moderately long stnlk, \vliil(> the o(1um-s 

 are short-stalked. The long seta) on the scuta, (figs, o c and 

 3 d) a little shorter than in the typical specimens. The last 

 pair of legs (fig. 3 r) shaped about as in smaller specimens of 

 the typical foi-m, but pres(M)ting some differences in the seta) 



