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more or less pointed. The tarsus (f) is always divided by a groove 
into two movable pieces, a short, distal piece, and a longer proxi- 
mal one. The distal piece terminates in a well developed c/aw- 
Joint and is provided with a long straight dorsal hair (pl. V fig. 6 2). 
At the base of the claw joint there is found, at least sometimes, 
two plumiform.hairs (Eucarus segmentatus and Italicus) (fig. 6 p). 
The lower edge of the claw. joint. (pl. V fig. 6) is more or less 
straight, while the upper edge is bent upwards and more or less 
toothed in the middle. There does not seem to be any areolum, 
at least not in Euc. segmentatus and Italicus. There is a well 
curved claw on each side articulated to a chitinous piece to which 
an upper levator tendon and a lower supinator one are fastened. 
The claw-joint is provided with a long upper curved hair (fig. 6 u) 
and.a lower and more straight one (fig. 6 /) on each side. 
The second pair of legs are a little shorter than the third, and 
much shorter and thinner than the fourth pair. There is only 
one short trochanter which is provided with a large, dorsal tooth 
directed upwards and backwards, the front end. of which merges 
imto the dorsal side of the trochanter, while the hindmost edge is 
perpendicular. The third pair of legs have the trochanter divided 
into two joints each of which is shorter than the one in the second 
pair of legs. The first trochanter is provided with a dorsal tooth; 
while the shorter second one has none. The fourth pair of legs 
are both longer and stronger than the two preceding ones; the two 
trochanters are cylindric, long and. slender, the mee one a little 
shorter than the second. 
5. Respiratory Organs. 
The breathing organs are tracheae starting from four dorsal 
stigmata placed in the first, second, third and fourth abdominal 
segments (pl. IV fig.2s, pl. V fig. 13 5). The position as well as the 
number of the stigmata are very singular. ,, Dorsal" stigmata are, 
as far as I know, only found in the Prostigmata, but here they åre 
