580 PAPERS ON SPIDERS 



Oreonetides Strand. 



Outer fang-teeth five, equidistant, increasing in size to the 

 fourth, the fifth equal and similar to the first; inner teeth 

 three, equidistant, the third largest, all conical, acute, as broad 

 at the base as high. Labium much broader than long, 

 narrowed below, not reaching the middle of the maxillae, 

 which are parallel-sided and slightly convergent. Two dorsal 

 spines on all the tibiae, one on the front side of tibia i. near 

 the apex; femoral none, metatarsal none. Falces similar in 

 male and female. 



British species : ahnormis BL, adipatus L.K., firmus Cb., 

 contritus Cb. 



Macrargus Dahl. 



Outer teeth as in Oreonetides, inner teeth three or four, small 

 in the female, similar to the outer in the male and as large. 

 Tumid base of the falces granulate, projecting far in front of 

 the clypeus. Labium large, half the length of the maxillae, 

 reflexed almost from the base, where it is broadest. Upper 

 middle eyes larger than the laterals, their interval half the 

 lateral interval. Leg spines as in Oreonetides. 



British species : rufiis Wid. 



Hilaira Sim. 



Outer teeth five, the fifth much smaller than the others, 

 darker, separated by a wider interval ; inner teeth three, very 

 small, almost granular, obtuse or subacute, first interval 

 narrower than the second. Labium wider than long, widest 

 in the middle (but not much wider than at the base), not 

 reaching the middle of the maxillae. Legs short and stout, 

 spines as in Oreonetides. In the British species (montigena ex- 

 cepted) the tarsi and metatarsi of the first pair are equal. 



British species : excisa Cb., uncata Cb., pervicax Hull, 

 montigena L.K. 



Leptorhoptrum Kulcz. 



Outer teeth five, similar in the two sexes, the fifth less than 

 the first, the interval between fourth and fifth greater than the 



