142 



inhibiting tin- usual sexual differences from the female. Anterior 

 antenna' of a structure similar to that in the male of IT. )i!>//i*. being, however, 

 clearly distinguished by the enormous development of the 2 sensory filaments. 

 First pair of legs, as in the female, with the outer ramus distinctly biarticulate. 

 Inner ramus of ^nd pair of legs differing slightly from that in the male of IT. 

 nnlt'il'i* in the form and armature of the distal joint, the basal spine being quite 

 short, whereas the inner apical spine is rather strong and peculiarly transformed, 

 falciform and finely denticulated along the concave edge. Last pair of legs very 

 like those of the male of IF. noliili*. differing, however, in the comparatively larger 

 si/e of the distal joint, which is moreover provided with 6, instead of 5. seta'. 



Colour not yet determined. 



Length of adult female 0.82 mm. 



Ill-murk*. According to the structure of the 1st pair of legs, this form 

 >hould really have been referred to the genus Pseudothalestris of Brady: but it 

 is evident that such an arrangement would be quite unreasonable, since in all other 

 respects the present species agrees so closely with the type of the genus UV>7- 

 icooilin, that a very close examination is needed in order to distinguish the two 

 species from one another. I think that the present species clearly shows that 

 the genus Pseudothalestris ought to be cancelled. 



Occni'nin'e. I have hitherto only seen 2 females and one male specimen 

 of this form. They were recently found among a number of specimens of IF. 110- 

 Inli* collected at different times and from different places, and T am therefore at 

 present unable to state the locality in which the specimens occurred. 



90. Westwoodia minuta, clans. 



(I'l. 1A XX VIII. ti u . I). 

 tn niiiudd. I'laiiv. li,. rri-ilclit-ndi'ii < . i]i.'p. id. MI. \<. I 1 S. I'l. XXI, li^s. 10 14. 



Syn: rxiH/lutJiiilrxfi-ix monenSlS, Brady. 

 major, Scott. 



rr*.- l'"rmti!(\ Body very short and stout, pronouncedly 

 pyriform in shape, with the segments of the anterior division deeply imbricate 

 dorsally. Cephalic segment very large and deep, occupying rather more than 

 half the length of the entire body; rostral projection quite short, triangular. Kye 

 \ery conspicuous in the living animal. Anterior antenna; comparatively slender 

 and attenuated, composed of G well-defined articulations, 2 of which belong to the 

 terminal part, .'3rd and 4th joints the largeM and nearly equal in length. Posterior 



