chamberlin: the arachnida. 195 



LiOPAGUS SIMPLEX, sp. nov. 

 Plate 5, fig. 4-8. 



Body above brownish grey, darker caudad; similar below with 

 a darker brown or dusky stripe across each abdominal segment. 

 Femora toward distal end each with a conspicuous deep black annu- 

 lus. Legs brown; patellae and the distal ends of tibiae darker. 



Body nearly parallel sided from level a little back of eye-tubercle 

 to one a little caudad of ends of coxae IV, then abruptly narrowing to 

 caudal end and semicircularly rounded in front. Obscurely granular 

 in a line across border of segments. 



Eye-tubercle as wide as high. Viewed from behind appearing 

 conspicuously constricted at base, the front face subvertical, not so 

 convex as the caudal. Tubercle wholly smooth; slightly depressed 

 longitudinally along middle line, (Plate 5, fig. 4, 5). 



All joints of legs free from tubercles but with scattered very fine 

 teeth on femora and a large one at distal end above on femora and 

 patellae. Coxae with a single slender process from distal end 

 above. 



First joint of mandible smooth, with the process below as usual ; a 

 few short hairs above and a series of them along a meso ventral line. 

 Second joint small; with a few short hairs above, glabrous beneath, 

 (Plate 5, fig. 6). 



Femur of pedipalp between two and three times as long as the 

 patella without its apophysis; with a series of short stout hairs be- 

 neath and smaller, less erect ones on dorsal surface but with no teeth. 

 Patella with apophysis moderately slender, cylindric, more densely 

 clothed with hair. Tibia also with more numerous short stiff hairs; 

 a slight rounded process at distomesal corner, this clothed with hairs 

 as elsewhere on joint. Tarsus with numerous fine short appressed 

 hairs and fewer shorter, stiff erect hairs. Claw pectinate, (Plate 5, 

 fig. 7, 8). 



Length dr. 3.5 mm. Leg I missing. Length of leg II cir. 42 mm. ; 

 of leg III, 2L5 mm. ; leg IV broken off at tip. 



Locality.— Huadquina, 5,000 feet, July 30. (Type, M. C. Z. 138). 



