8 ARKIV FÖR ZOOLOGI. BAND 3. N:0 28. 



femur, cylindrical, ventrally provided with two small hairs, ex- 

 ternally with 6, interiorly two hairs whose size is shown in Text- 

 fig. 2 and dorsally with two hairs. 



The tibia is slightly larger than the genu ventrally like the 

 genu and femur, externally provided with 5 hairs, dorsally 

 with two small, interiorly Avith 4 hairs. 



The tarsus is siightly longer than the femur and has a very 

 short, but distinctly demarcated basitarsus; its distal third is 

 slightly bent iuAvardly, with thin cuticle, andgradually narrowing 

 to a thin minute, conical point. It bears externally 5 hairs of 

 which the fourth one is fined longer and points straight out- 

 wards, ventrally two, and interiorly 4 hairs. The top of the 

 joint bears 4 — 5 straight diverging hairs and on the distal 

 third externally is a bundle of about 20 thin tactile hairs (Fig. 7). 



Legs 1 are bent in a special way viz. trochanter and femur 

 obliquely outwards, the angle between genu and femur and be- 

 tween genu and tibir is nearly right, so that tibia and tarsus 

 are directed obliquely inwards almost parallel to femur. Ac- 

 cordingly tibia and the femoral bristles act against each other. 



Legs II — IV are of almost uniform thickness and length, 

 legs IV being slightly longer owing to the more elongated femur 

 and tarsus. 



The coxse are short, ringshaped, all interiorly provided 

 with two short hairs and ventrally with one or two rows of 

 fissures, like coxa I and the metapodish shields. 



The trochanter is distally provided with 4 hairs of which 

 two are fine sense hairs. 



The femur has a distinctly demarcated short basifemur, 

 w^hich by means of a ring of thin cuticle, ventrally and dorsally 

 forming a kind of superficial condylus, is capable of articula- 

 tion with the telofemur. 



Telofemur, genu and tibia of the same length, short, pro- 

 vided with short, curved hairs whose number and position is 

 shown in Fig. 26, Pl. I. The tarsus has a distinctly demarcated 

 basitarsus and bears exteriorly one rather long slightly curved 

 sense hair. 



Tarsi II and III have distally and ventrally a strong tooth 

 shaped chitinous projection. (Fig. 20.) 



The feet II — IV are without claws and provided with 

 very large three-jointed ambulacrse. (Textfig. 1.) 



