234 Families, Genera and Species of British Spiders, etc. 



first the family in table A., then the genvis under the chosen 

 family in table B., and lastly the species imder the selected 

 genus in table C. — the determination should be invariably con- 

 firmed by careful comparison with a detailed description, and, 

 if possible, with sectional figures. 



FAMILIES AND GENERA OF BRITISH SPIDERS. 



TABLE A.— FAMILIES. 



A. Eyes 6, in Dihlemma 2 First Section. 



B. Eyes 8. 



I. Eyes in 3 transverse groups of 3-2-3* ,. Second Section. 



II. Eyes in 2, 3, or 4 rows. 



1. Eyes in 2 rows, not greatly unequal in 



size, forming a transverse group wider 



than long Third Section. 



2. Eyes in 3 or 4 rows, very unequal in 



size, and homogeneous, forming a 



group as long or longer than wide . . Fourth Section. 



First Section. 



A. Eyes in 3 widely separated pairs — the odd 



pair in front Scytodid^ (4). 



B. Eyes in a compact group. 



I. Falces strong. Eyes of moderate size .. Dysderid.^ (2). 



II. Falces weak. Eyes large Oonopid.?: (3). 



Second Section. 



A, Falces very weak. Legs very long and 



slender Pholcid^ (12). 



B. Falces exceedingly strong. Legs much 



shorter and stouter Atypid.^(i). 



Third Section. 



A. Tarsal claws 3. 



I. Females at least with a cribellum (super- 

 numerary spinner). 



1. Cephalothorax without a longitudinal 



impression, caput narrow. Eyes in 



2 trans\erse rows widely separated . . Uloborid;e (16). 



2. Cephalothorax with a longitudinal (9) 



or small round (8) impression, caput- 

 more or less broad and massive 



(a) Eyes in 2 rows more or less parallel 



and fairly closely grouped . . . . Dictynid.e (9). 



(b) The four central eyes forming a 



close group well separated from the 

 lateral eyes of both rows, which 

 are themselves widely separated . . Eresid.^j (8). 



II. Both sexes without cribellum. 



I. Superior spinners long, two jointed 

 (exc. A rgyvoneta ) . 

 {a) Spinners in a group Agelenid^ (10). 



* See also Plwlconiina on p. 240. 



Naturalist, 



