68 



iiK'ntioiiud coxal liairs sliow so innrked varialioiis in al least llircc of the lour 

 species, in which Ihey have heen observed, it will certainly be of value to have 

 the few available facts, concerning this subject, collected; I give in the following 

 a full description of their position and shape in Cht. Rayi L. K. and Cht. terribilis 

 n. sp., and add a quotation, elucidating their characteristics in Cht. Wlassicsi Dad. 



1) Concerning the last genus Daday writes (14. p. 479, tab. XI, fig. 9): "coxis 

 pedum secundi paris margine interiori superior! rotundato setis 6—7 clavatis"; these 

 hairs are according to the figure terminally three-branched. 



2) Cht. Rayi L. K. The second pair of coxae bears near to the inner anterior 

 corner about ten irregularly and rather densely placed, moderately long and curved 

 hairs, which are hooked terminally and provided with two lateral rows of very 

 minute branches, like a feather; the third pair bears near the inner posterior 

 corner about eight rather slender, pinnate straight bristles, arranged in two longi- 

 tudinaljrows, the four median being the longest. 



3) Cht. terribilis n. sp. Along the ventral margin of the second pair of the 

 coxae posteriorly and near to the inner corner a longitudinal row of hairs is found» 

 which establishes an obtuse angle, open outwards and backwards, with another 

 row placed inwards on the posterior surface and almost continued into the former. 

 The structure of these hairs provide similarity to those described and drawn by 

 Daday. The first hair in the row on the posterior surface, which is nearest the 

 base of the coxa, is rather short, enlarged distally and divided into about five 

 pointed branches (PI. I, fig. Ill, /); near its base a very short spine is found; the 

 three following hairs are longer and increasing in length, and terminated in two, 

 three and five branches. The three following, which are shorter, and placed in 

 the other row (fig. 1 h, e), are distally provided with a number of short marginal 

 teeth ; the eighth liair is a mere tooth. 



The characters found in the relative length of the joints of the legs will pro- 

 bably prove valuable. 



IV. Synopsis of Genera. 



When the names of the genera or sifbgenera are placed within a parenthesis, 

 it signifies, that the genus is doubtful. 



1) Flagellum consisting of a few simple hairs (Lechylia Balz.) 



1) Flagellum consisting of one or two tufts of 



hairs 

 2. Front margin prolonged into a median tooth (Megathis Steck.) 



2. Front margin not prolonged into a median 



tooth Chthoniiis C. K. 



3a. Four eyes (s. g. Chthoniiis Balz.) 



3 b. Two eyes (s- g. Pseudochthonius Balz.) 



3 c. No eyes l-s- g- Typhlochthonius Balz.) 



