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longer, straight dorsal hair. The two claws are only slightly curved, 
and there is no claw-joint (pl. V fig. 2 2). 
In most of the specimens that I have examined the first pair 
of legs were carried in: a more or less backward and upward direc- 
tion along the back; as the trochanters were directed forwards, the 
other legs are always directed towards the ground. Because the 
first pair of legs are carried in the said manner, and on account of 
several structural differences between this and the other legs, it is 
most natural to regard the first pair as feelers more than as am- 
bulatory appendages. The first pair of legs are much more long 
and slender, the proximal piece of the femur is well developed and 
accordingly promotes the upward direction, the articulation between 
the trochanter and the femur has a well marked upward direction. 
The claws are only weakly developed, and there is no movable 
claw-joint. 
Leg II, III, IV (pl.V fig.3-5). The three last pairs of legs are 
shorter and stronger than the first. The trochanter II of the second pair 
is always missing. The proximal piece of the femurs is only marked 
by a dorsal incision. The femurs are more or less perpendicular 
in most of the examined specimens, the distal part of the legs is 
directed towards the ground and almost reach to it. The patella 
always bears a dorsal median row of pointed hairs. The tibia is 
always provided with a median dorsal row of pointed hairs and a 
long terminal thick and stiff hair. The dorsal side of the meta- 
tarsus bears strongly curved ,tactile" hairs. The arrangement of 
the other hairs varies somewhat in the different species; the fan 
hairs are mostly longer and more slender at the distal joints with 
the exception of the tarsi, where as a rule they are missing; the 
longest are found along the dorsal margins in the fourth pair of 
metatarsi. 
The femur (b) is always longer and thicker than the other 
joints; the patella (c) is always shorter than the three last joints; 
the patella and the femur are enlarged towards their tips, the tibia 
(d) is almost cylindric, while the metatarsus (e) and tarsus are 
