93 



Ihe femont of the first pair, which is of interest, because not only the length l)ul 

 also the arliculalion between its two joints change. The most typical developmenl 

 of Ihe femur of the first pair of legs can be observed in f. inst. Gaiifpus irriujatns 

 Sim. or G. elegans Sim. and in Olpiiim cortlimaimm Balz, or 01. Binnanicnni n. sp. 

 (PI. II, figs. 1 c, 7 f and figs. 8 a-b, p. 38); the basal femoral portion is in these 

 distinctly widened out towards the end, about three times longer than the depth, 

 at least IS longer and a little deeper than the tibial part; almost the same pro- 

 portions between the joints are found in G. Cmjahanus Balz, with rather short legs 

 and with femoral basal part only twice as long as deep, as well as in G. saxicola 

 Walh. with very long and slender legs and the basal part more than four times 

 as long as the depth. In Olpiiiin crassichelatiim Balz, and Olp. n. sp. from 

 Queensland we find that the basal femoral part is scarcely twice as long as the 

 depth distally, less than 15 longer than tibial part. The femur appears in all the 

 forms mentioned to consist of two dilTerent joints, connected by a more or less 

 developed hinge-joints, allowing movements in the plane of the joints. It is not so 

 in Gurypiims n. s]>. from Hawaii, G. n. sj). from Funafuti, and G. iwbilis n. sp. (PI. II, 

 fig. 8 f, and figs. 7 a-b, p. 36), for in these the femur is easily seen to be a whole, 

 and the basal part is similar to a trochantin, as in Chelifer Geof. ; there is no 

 hinge-joint between the two parts (cf. p. 38); the basal part of G. n. sp. from Funa- 

 futi is half as long as the wliole femur, while it in the two other species is only 

 one third. 



The femora of the fourth pair of legs are always provided with a basal tro- 

 chantin, which is limited from the distal portion of the femur by an articulate 

 membrane, which is always oblique to the main axis of the femur and consequently 

 is making the ventral margin much longer than the dorsal. The femur is as a 

 rule two or four times as long as the ventral margin of this joint, only in Gary- 

 pinus nobilis n. sp. three times longer and in Olpium Birmanicum n. sp. a little 

 more. The trochantin is according to Banks wanting in Garypiis bicornis Bks. (50. 

 p. 9). The relation between the length and the depth of the femur of the fourth 

 pair of legs is very variable; in Garypus Floridensis Bks. the femur is about live 

 times longer than deep, in G. irriigatiis Sim. it is about three and in most species of 

 Olpiiim L. K. two and a half times as long as broad, while it in Olpium Birmanicum 

 n. sp. is even less. 



The tarsi of the legs are always two-jointed and in tliis respect there is a 

 similarity lo the Obisiidae Hans., but in the fact that the tarsi are seldom much 

 longer than the tibia there is a dissimililarily. The usual dilTerence between the 

 relative length of the tibia and tarsi respectively of the first and fourth |)air of 

 legs is very pronounced in most forms of this family. The tarsi of the first pair 

 of legs seem never to be lo times longer than the tibia, but is in several species 

 1"4 longer f. inst. in Garypus irruyatns Sim.; in most species the tarsi are of almost 

 equal length to the tibia or a little longer f. inst. in Garypinus nobilis n. sp. (PI. 11, 

 figs. I c-d, 8 f-g) only seldom a little shorter as in G. n. sp. from Hawaii. The tarsi 



