Families Genera and Species of British Spiders, etc. 443 



(2) Ge)i. LiobitiuDn. 



A. Eyes rimmed with black : two blunt pro- 



jections below the front edge of the 



cephalothorax rotiinditm Latr. 



B. Eyes rimmed with white ; tlu-se jn-ojec- 



tions absent hhickivcllii Meade. 



(3) Gen. PhalaiigiHin. 



A. Two prominent adjacent teeth below tlie 



front edge of the cephalothorax . . . . opilin hinn. 



B. These teeth absent. 



I. Size larger ; without central abdominal 



line of conspicuous white spots. . .. payietinum Q. Koch. 



II. Size much smaller ; with central ab- 



dominal line of conspicuous white spots saxatile C. Koch. 

 The doubtful .species Ph. Dn'iiufuiii is omitted. 



(4) Gen. Platybuniis. 



^ Apophysis of cubital joint of palpi = .V length 

 of joint itself : adult form : falces ^ with 

 a strong hornlike protuberance . . . . coynigey Herm. 

 Apophysis of cubital joint of palpi = | length 

 of joint itself : falces q witliout this 

 protuberance ; immature . . forma tyiangulavis Herb. 



(5) Gen. Megabitnus. 



Eye eminence large with a pedicle ; a long 

 spine projecting from the front edge of 

 the cephalothorax insignis Meade. 



(6) Gen. Oligolophus. 



A. The three frontal spines of the cephalo- 

 thorax small. 



I. Frontal spines equal, wide apart. 



I. Legs short, without spines or denti- 



culae cineyascens C. Koch.* 



, 2. I-.egs long ; femora and g(>nua^ with 



minute denticulae. 

 [a] Spines on tibiae of legs I. none, or 



few and weak inorio Fabr.* 



(I)) Spines on tibiae of legs I. numerous 



and strong aJpiniis Herbst.* 



II. Frontal spines closer together, central 



one slightly longest. 



1. Central frontal spine a little in 



advance ; all directed slightly for- 

 ward ; genital plate with a circular 

 i indentation agyestis Meade. 



2. Frontal spines in a straight line, 



vertical or nearly so ; genital plate 

 without indentation. 

 [a] Lighter coloured ; femora of legs 

 • angular ; frontal spines slenderer 

 and a little separated . . . . Ividens C. L. Koch. 

 ib) Dark coloured ; femora of legs 

 cylindrical ; frontal spines stouter 

 and contiguous hanseuii Kraepl. 



* I" ' De Opilionibus,' p. 80, Kulczynski states that cinerasceiis 

 C. Koch, is merely immature alpiniis Herbst., which is itself only an alpine 

 form of morio Fabr. 



1910 Dec. 1. 



