F. P. SMITH ON THE SPIDERS OF THE DIPLOCEPHALUS ft ROUP. 299 



1869. Phalops, Menge, Preuss. Spin, (ad partem). 

 1870-3. Erigone, Thor., Rem. on Syn. (ad partem). 

 1879-81. Walckenaera, Cambr., Spid. Dorset (ad partem). 

 1884. Prosoponcus, Sim., Ar. de France (ad partem). 

 188G. Walckenaera, Dahl, Monog. Erig. (ad partem). 

 1900. Savignia, Cambr., List Br. Ir. Spid. 

 T v pe : S. fro n ta ta, BL 



Savignia frontata, BL, 1833. 



1833. Savignia frontata, BL, Lond. Ed in. Phil. Mag. 



1859. Micryphantes conifer, Grube, Archiv. Rat. Li v.- Ehst.- and 



Kurlands. 

 1864. Walckenaera frontata, BL, Spid. G. B. I. 

 1869. Phalops conicus, Menge, Preuss. Spin. 

 1870-3. Erigone frontata, Thor., Rem. on Syn. 

 1879-81. Walckenaera frontata, Cambr., Spid. Dorset. 

 1884. Prosoponcus frontatus, Sim., Ar. de France. 

 1886. Walckenaera frontata, Dahl, Monog. Erig. 

 1900. Savignia frontata, Cambr., List Br. Ir. Spid. 



Genus Monocephalus, n.g. 



1864. Walckenaera, BL, Spid. G. B. I. (ad partem). 

 1879-81. Walckenaera, Cambr., Spid. Dorset (ad partem). 

 1884. Plaesiocraerus, Sim., Ar. de France (ad partem). 

 1900. Diplocephalus, Cambr., List Br. Ir. Spid. (ad partem). 

 1900. Tmeticus, ,, ,, ,, ,, 



Type: M. fuscipes, (BL). 



The following are the most important characters separating 

 this genus from the genus Diplocephalus. The clypens in the 

 male, from abov T e to below, does not slope inwards. The tibia 

 of the male palpus is produced, as in Diplocephalus, in the form 

 of a large, broad apophysis, but differs in being obtusely, almost 

 squarely, truncated at the extremity, and devoid of any curved 

 projections. The form of the female epigynum is totally different 

 from that of the typical Diplocephalus, being considerably more 

 complex and devoid of a median fissure. Dij)loceph<ibix (Plaesio- 

 craerus) caslaneipes, Sim., 1884, a species which has not yet 

 occurred in Britain, is referable to this genus. 



