122 DR. A. RANDELL JACKSON ON THE 



The drawings which illustrate this paper were all made 

 with an Abbe camera lucida. They are therefore only very 

 slightly diagrammatic. In the case of the palpi the principal 

 idea was to get correct representations of each lamella 

 characteristica. The paracymbia, as will be noticed, are 

 not always in the same relative positions. 



The drawings were made to scale, as it was intended that 

 the relative sizes of the sexual organs of the different species 

 should be shown. It has, however, been necessary to reduce 

 the size of most of them. The reduction was made to scale, 

 with the exception that figures 6, 6a, and 6b on Plate VII., 

 and figures i, 5, 6, and 6a on Plate VIII. were not reduced, 

 and hence are larger than they should be in proportion to the 

 others. 



I must tender my best thanks to the Rev. O. Pickard- 

 Cambridge for his great kindness in lending me so many 

 actual types and other specimens of these species. Without 

 these loans my paper would have been quite useless as 

 regards nomenclature. Mr. E. Simon and Professor Kulczynski, 

 as well as the Rev. J. E. Hull and Messrs. Falconer, Britten, 

 and Pack-Beresford, have all given me great assistance, and I 

 take this opportunity of thanking them. 



Diagnosis of Genera. 



1 . Metatarsi i. and ii. each bearing a stiff spine above. Central 



posterior eyes much larger than laterals ... ... ... Sy edra 



Metatarsi i. and ii. without spines. Posterior eyes subequal 2 



2. A long sensory seta is placed on the upper side of metatarsi 



i., ii., and hi. near the base. It is absent on metatarsus 



iv. (This is also the arrangement in Syedrci) ... Micryphantes 



A long sensory seta occurs on the upperside of all four meta- 

 tarsi near the apex ... ... — ... 3 



3. Falces very small in both sexes. The anterior border bears 



two teeth, the posterior border one. Palpi of females 



tumid. No spines on anterior borders of tibise i. Agyneta 



