10 studies on Arthropocla. I. 



Paracharon n. gen. 



Ceplialotliorax not much broader than long, anteriorly 

 somewhat produced, with a rather short, transverse, anterior 

 margin. Eyes and ocular tubercles completely- want- 

 ing (fig. 2 a). First sternum is a light transverse strip more 

 firmly chitinized than the membrane at its front margin, but 

 instead of a sternal labium only a tin}- granule with a small 

 vertical seta is seen at the middle of the sternum. Each of the 

 two following sterna have a rather slender, subcylindrical 

 process projecting nearly vertically downward, Ingher than 

 thick, and with some short, brown setse on the rounded distal 

 part. — Second abdominal sternite simple, as its posterior 

 part is not marked off or produced. — Palps considerably 

 shorter than the bod}-, built as in the Charontidoi; first tarsal 

 joint (fig. 2 d) with two spiniform processes on each margin 

 and the distal processes much longer than the proximal; second 

 tarsal joint with three processes on the upper margin, and the 

 claw marked off but not movable. Walking legs as in the Cha- 

 rontidse, excepting that the tibia of fourth pair consists only 

 of two subjoints. 



Remarks. — This most interesting genus differs from 

 all other genera of the suborder in having no eyes and 

 no sternal labium. It shows, howe\-er, close relationship 

 to the Charontidae in all other features, excepting that 

 the fourth pair of tibia? ha\-e only a .single secondary arti- 

 culation. 



It ma}- be noted that I have looked in vain for sensors- 

 hairs on the places of the eyes. But the normal long tactile 

 hairs on the walking legs and the peculiar small, clu])-shaped 

 sensory hairs on the distal tarsal joints of the first pair of legs 

 exist, though less numerous, as in the large form Tarcntula 

 reniformis L. {Phrynichus nigrnnanus C. L. Koch) (see H. J. 

 Hansen: Organs and Characters in different Orders of Arach- 



