322 GEO. H. HORN. M. D. 



Fifr. 5 is tlmt of the same tarsus of the female. The joints are 



broader thau lono;, being in fact so short that the tibial spur Cijuals 



y and even exceeds the length of the first four joints. 



^^/ M Among the Cncmotnipcs the joints as shown in tig. 



(T^s^ 6 are normal, being cylindrical and of such a length 



^ ' / that the first three generally etjual and exceed the 



^^'^^ length of the longest spur of the same tibia. Fig. 7 



shows both spurs; the shorter being slightly curved. In both groups, 



Caemotrupes and Onycliotrupes. the long spur of the middle tibia (in 



9 ) appears to be equal in length. The disparity between it and the 



tarsus being solely dependant on the shortening of the latter, and not 



upon any greater development of the spur in either case. 



In the two groups above mentioned (as well as in M/yrofniprit). the 

 anterior tibia affords evidence of sex. Figs. 8 and 9 represent the 

 form assumed in the males. The apical tooth will be seen to be pro- 

 duced inwards and emarginate at tip. The spur also varies in length 

 and thickness, as will be seen in the two figures given, in one (8) short 

 ,. ", Vx. '° robust, scarcely equaling the half of the length of the 

 «M. 9 1^ \\ apical tooth. In the other (9) it is much longer and 

 ^ ' iT more slender, being, in fact, as in the female. The 

 anterior tibire of the females of all the groups resemble each other, 

 and fig. 10 may represent that sex in each group. On the under 

 surface of the tibia, running its whole length nearly, may be seen 

 an elevated line, more or less denticulate or serrate, varying somewhat 

 in each species, though not sufficiently in our own to be of much 

 use in classification. In some Fast Indian species this line i^ elevated 

 ,4. (in % ) into several large hook-like teeth. 

 J V^^^^W j[j ggg 13 and l-i will be found an illustration 

 of the posterior marginal line of the thorax, more or less continuous 

 across the whole border, broadly interrupted in aemiopacua ( 18 ), 

 continuous and well marked in .^p/f nduhi.^. Eijo'lri etc. (14). 



