74 



bulletin: museum of comparative zoology. 



fern. tib. +pat. met. tar. total 



Leg I 6 mm. 6.5 mm. 4.6 mm. 3.5 mm. 20.6mm. 

 Leg II 5.2 5.5 4 2.5 17.2 



Leg III 5.2 5.6 4.5 3.1 18.4 



Leg IV 6.2 6.7 6.3 3.1 22 3 



V 



Brachybothrium hageni, sp. nov. 

 Plate 5, fig. 9. 



Type — M.C.Z. 116. d". Washington: Col ville Valley; Loon 

 Lake, 25 July, 1882. Samuel Henshaw. 



Cephalothorax and legs brown of a dilute chestnut east, the coxae 

 of the legs ventrally dusky; palpi paler than the legs. Area between 

 eyes blackish. Abdomen light or yellowish brown; dusky ventrally 

 and over sides, leaving a slightly paler area above which is more or 

 less broken into three spots. Spinnerets yellowish. 



Posterior declivity of pars cephalica nearly straight, descending 

 directly from the eyes to the fovea thoracica. The longitudinal fovea 

 thoracica sharply impressed; radial lines distinct. 



Eye-tubercle convex; moderate. Anterior median eyes as usual 

 greatly smaller than the lateral, a little exceeded by the posterior 

 median ones. 



Chelicerae rather small; near middle of convex, anterodorsal, 

 surface conspicuously elevated at mesal side and bearing a dense 

 growth of long stout bristles. 



Labium and the coxae of pedipalps not spinulose. 



Tarsi of legs all slender, conspicuously curved or bent a little distad 

 of middle. Spines of metatarsi long and slender, numerous. Claws 

 armed with 6 or more teeth. 



^ Tibia I subcylindric or very slightly clavate distad; on anterior 

 side over middle third of length with a dense patch of long slender 

 spines and a similar area on the posterior or ectal side covering an 

 area between middle or a point a little distad of middle and the distal 

 end; also bearing numerous longer and shorter black hairs. Proximal 

 half of tibia II more slender than the distal. 



Femur of palpus in the male long and slender, curved, laterally 

 somewhat compressed. Patella moderate, much shorter and more 

 slender than the tibia; 1.8 times longer than thick. Tibia thick, 

 elongate, rounded at ends; about 2.65 times longer than thick and 



