186 
small specimen of Gluvia dorsalis Latr. (hardly 11 
mm. in length) I have found a stridulating apparatus 
furnished with very long keels forming an intermediate 
link between the organs in Cleobis and Solpuga. 
Every trace of keels is wanting on the naked 
area in an animal from Apscheron (Baku), belon- 
ging to Gluvia according to the definition of Simon; 
and owing to a supposition based on the locality (it has 
not been possible for me to procure the treatise of L. 
Koch) I believe this animal to be Gl. caucasica L. Koch; 
it ought hereafter and especially in regard to the 
abnormous structure of its rostrum (see later on) to 
be separated as a particular genus. 
It may still be quoted that L. Dufour has mentioned 
and figured (op. cit. p. 393, Pl. 2, fig. 6 b and fig. 8 a) 
»six ou sept traits paralléles, stries ou cannelures« in | 
some species, without adding further explanations. 
F. The Tarsus of the 2d—4th Pair of Legs. 
In Solpuga fatalis Licht. we find on the basal 
portion of the tarsus close to the insertion upon the 
metatarsus a rather small, arched, transverse area, 
stretching a little down upon the anterior and posterior 
side of the joint, where it is raising like a lower, blunt 
protuberance (Tab. IN, fig. 10). This area (a) is trimmed 
with c. 24 sharp furrows and interjacent keels, radiating 
towards the extreme basis of the tarsus. The portion 
at the basis between this area and the articular mem- 
brane (c) is a smooth plane, being on the 2 anterior 
pairs of legs stronger arched and raised like a smaller 
process, on the hindmost pair of legs it is, however, 
less arched and not raised towards the basis (b). Meta- 
tarsus projects on the dorsal side and slightly down 
upon the sides freely and rather considerably like a 
