127 



the corressponding hair of the first pair of legs at least in the male. The posterior 

 hair is alike in all the tarsi of Ch. Socotrensis With with tiny dorsal tooth and 

 lower branch moderately curved with tip directed upwards; the anterior is broken 

 with a tiny tooth and almost straight beyond that in the fourth pair of legs, but 

 seems to bear several small teeth in the first pair (cf. 21. p. 115). 



Ch. siiperbus n. sp. has the posterior hair very slender, almost straight, and is 

 beyond the tooth moderately curved downwards with tip directed upwards; the 

 tooth is very tiny in the fourth pair of legs, but better developed in the first pair 

 of the female; this hair is in the fourth pair of the male remarkable by a very 

 tiny ventral tooth opposite to the dorsal (cf. Ch. lampropsalis L. K. sp. aiT.), and in 

 the first pair by being a very slender with scarcely marked tooth. The anterior 

 hair is long and slender in the fourth pair of legs; it is moderatelj' curved with 

 a tiny tooth in the female, but broken and with a well marked tooth in the 

 male; that of the first pair in the female has the terminal part short with obsolete 

 tooth, while it in the male has at least one distinct tooth. The posterior hair of 

 all pair of legs attains in the male of Ch. granulatus C. K. an interesting development, 

 it is fairly long and slender, moderately curved upwards in the middle and gra- 

 dually widened out towards the dorsal toolh; this is only small, while the lower 

 branch is large and moderately curved downwards, first of almost equal depth, 

 but beyond a small ventral tooth tapering distinctly towards the pointed upwards 

 directed tip (PI. Ill, fig. 4 a, /le). The corresponding hair has generally in the female 

 the lower branch more clumsy and apparently bifurcate on account of differently 

 developed ventral tooth. The anterior hair is moderately curved upwards with 

 tiny dorsal tooth in the fourth pair of legs, while it in the first pair of the legs 

 in the male (hi) has the dorsal tooth fairly big, and in the female appears almost 

 hooked on account of the short terminal part, which is beyond the distinct dorsal 

 tooth. The posterior hair is in the fourth pair of legs in Ch. biftssus Sim.(?) almost 

 straight and dislally bifurcate with lower branch the longest; the lower branch is 

 in the first pair of legs slightly curved (21. pi. VI, figs. 1 e-f); the anterior hair is 

 in the fourth pair of legs distinctlj' curved upwards in the middle with obsolete 

 dorsal tooth and gradually pointed, bearing similarity to that found f. inst. in Ch. 

 JaiHinus Thor. ; the anterior hair of the first pair of legs is short with at least 

 three terminal teeth (cf. 21. p. 100). 



From the above it may easily be realized that the ditTerences between the 

 anterior and the posterior terminal lateral hair are most often well marked, some- 

 times better in the first pair of legs and sometimes in the fourth pair. When a 

 sexual ditTerence is found in the development of the hairs, it is generally most 

 marked in the first pair of legs, and the hairs are generally more complicated in 

 the male than in the female, if there is any difference. The structure of the hairs 

 difier in a considerable degree in the different si)ecies, and their structure ought to 

 be taken into consideration in the description of the species in spite of the rather 

 difficult investigation, as they seem to provide a character without much variation. 



