400 Mr. Templeton on certain Spiders. 
Art. LV. On the Spiders of the Genus Dysdera, Latr. 
with the Description of a new allied Genus. By Rosrrt 
Temp.eton, Esg. In a Letter to the Editor. 
Sir, 
My attention having been directed for some months past to the Spiders 
in my immediate neighbourhood, an attentive examination of their 
generic characters became necessary. The following paper, which is 
the result of my enquiries so far as relates to the genus Dysdera of La- 
treille and an allied one, of which at present I have met with only one 
species, will I hope prove not devoid of interest to your readers. 
Iam, &c. 
Rost. TEMPLETON, 
Corr. Memb. Belfast Natural History Society. 
To N. A. Vicors, Esq. 
ARANEADA, Leach. 
DyspeEra *, Latr., Walcken., Leach. 
Eyes 6, arranged in the circumference of a circle, the anterior 
largest. 
Div. 1. DysprEra. 
Mandibles + porrect, about half the length of the thorax, internally 
truncated obliquely from a little beyond the base, posterior edge sur- 
* That there exists a necessity for an attentive examination of the various 
genera of the true Araneide, and indeed I might say of the Arachnida gene- 
rally, will be at once recognized when I state that Ihave a considerable num- 
ber of Spiders that will go into no genus as at present established, and that the 
genus Epéira, as the characters are given in that deservedly popular work, 
Samouelle’s ‘ Entomologist’s Useful Companion,” will not admit the typical 
species Ep, Diadema with guadrata, alsine, and a host of others, 
+ In examining the jaws of Spiders the various parts must be detached from 
the head of the animal, since from the transparency and minuteness of different 
parts, their exact form cannot be determined; besides the errors likely to arise 
