ON NEW AND RARE BRITISH ARACHNIDA. 143 



Fig. 60), in general characters and colour. Some slight 

 differences may, however, be observed when closely compared 

 with the description (I.e.), though these may be only sexual or 

 owing to some small inaccuracy of observation. 



The lateral marginal impressions at the caput seem to be 

 rather stronger, and the fore-central eyes not so large in 

 proportion as in the male. 



Legs 4, i, 2, 3, not very unequal in length. The colulus is 

 distinct, somewhat triangular, acute pointed, of a deep brown 

 colour, and furnished with slightly bristly hairs. 



Abdomen pretty thickly clothed with short hairs, and the 

 genital aperture is of a very distinct and characteristic form. 



Found at Bloxworth Rectory in company with a male in June, 

 1906, on the same spot where in several successive years the 

 male has been taken, and I feel but little doubt of its being the 

 female of this species. This sex has not been before described 

 or figured. 



I should record here an adult male, hitherto overlooked, taken 

 at Ringstead (between Weymouth and Lulworth) in 1894, an< ^ 

 another at VVarmwell in 1896. 



Tmetieus serratus, Cambr. PI. B., Figs. 45-48. 



Erigone serrata^ Cambr., Proc. Zool. Soc. Lond., 1875, p. 325, 

 PL 44, Fig. 2. 



This spider is very nearly allied to T. silvaticus, Blackw., 

 which it closely resembles in general form and colour, but is 

 much smaller, the male measuring in length i line and the 

 female ij. The male may, however, be distinguished, among 

 other differences, by the structure of the palpal organs (see 

 figures of both species, PI. B.), and by the less strength in 

 T. serratus of the minute denticles in the longitudinal row 

 near the outer side in front of each of the falces. In T. 

 silvaticus, BL, the spiniform bristle at the fore extremity on 

 the upper side of the cubital joint of the palpus is also shorter 

 and much more robust. In the male palpi the rather strong 



