106 TiYi)K.\r.\r<iNA 



somewhat narrower in the posterior part. The epimeral groups lie closer together, the first 

 epimeron is rounded apically and the bristles along the medial border have longer feathers. 

 Also at the base the first epimeron is broadly rounded, without the slightest trace of the hook- 

 like projection of the female. The maxillary bay decreases in width posteriorly, and the 

 epimera of the first pair are brought closer together than in the other sex, pressing the 

 maxillary organ out of position in a dorsal direction. The first epimeroglandulare is hardly 

 smaller than in the female (cf. Lundbladia). 



The anterior pair of legs presents very striking differences. They are distinctly short- 

 ened, particularly in the basal segments and resemble very much the same leg in Lundbladia. 

 Whilst the female possesses a long and strong bristle on the ventral side of the second seg- 

 ment, the male has this bristle developed into a thick spine. On the dorsal margin of the 

 following segment the male has two curved, strong spines, just as in Lundbladia. On the 

 other hand, I am unable to find the angular swelling, described in Lundbladia, on the outer side 

 of the second segment of the first leg. Consequently the leg in question is not distorted as in 

 the genus just mentioned. 



In the genital organ the sexual differences are very conspicuous. It fills completely the 

 space between the four groups of epimera, which allow the genital structures very little space. 

 The first pair of acetabula, for instance, overlaps the posterior ends of the first pair of 

 epimera. Obviously, through the pressure against the epimera, these acetabula have altered 

 their shape from elongated to more rounded, being even bluntly distended in front, as if they 

 had been pressed together. As in the other sex, anterior and median acetabula are attached 

 to socles. The second pair is not placed posterior to the middle of the genital plates as in the 

 female, but has been pressed forward until somewhat in front of the suture between the third 

 and fourth pairs of epimera. The posterior acetabula, however, have retained the same posi- 

 tion. The genital plates are narrower and have thinner bristles. Their lateral margins are 

 partly overlapping the borders of the epimera. 



Locality. Kashmir: Stream W. of Sonamarg (K71), altitude 2590 m. (temp. 

 + 7.0°C.), 19 May, 1932. Indian Tibet: Shimsha Karbu, between Dras and Kargil 

 (K78), altitude 2819 m., in a spring (temp. + 8 C, pH. 7.8), 22 May, 1932. 



Systematic affinities. The above described, very interesting genus is nearest related to 

 Tricliotliyas and Lundbladia, with which it has many characters in common. 



Such characters are : 



(1) composition of frontal shield 



(2) non-pigmented frontal organ 



(3) right and left elements of third and fourth pairs of doscocentralia united to 



form two medial shields 



(4) eyes stalked and lying in a shield together with the praeocularia 



(5) the same sexual differences in the first pair of epimera 



(6) the same sexual differences in the maxillary organ 



(7) the same sexual differences in the situation of the second pair of acetabula 



(8) principally the same sexual differences in the first pair of legs 



The most important difference is to be found in the genital organ, which comes nearest 

 to that of Lu}uJbladia. Especially the males of the two genera are very much alike, whilst the 



