II. 
ON WALCKENAERA INTERJECTA, A NEW SPIDER FROM 
HODDESDON. 
By the Bey. 0 . P. Cambeidge, M.A., F.B.S. 
Read at Hoddesdon, 3rd November , 1887. 
(Communicated by the President.) 
A single example of the male of this spider was found in an 
outhouse at Hoddesdon, and kindly sent to me hy Mr. F. M. 
Campbell, of Bose Hill, and it appears to me to he new to science. 
It is nearly allied to Walckenaera elegans , Cambr.,* from Nuremberg, 
but differs in several well-marked specific characters; chiefly in 
the form of the caput and of the palpi and palpal organs. 
About the same time I received an adult example of each sex 
from Holland, where they were found by Major-General A. W. M. 
Van Hasselt, who kindly sent them to me. 
Class ABACHNIDA. 
Order Aeaneidea. 
Family Theridiidce. 
Genus Walckenaera , Bl. 
Walckenaera interjecta , sp. nov. 
1. 2. 3. 
Fig. 1. Profile of cephalotborax of male. 
,, 2. Outline of left palpus from above on the inner side, showing the charac¬ 
teristic form of the radial joint (a) with its exterior terminal spine ( b ). 
,, 3. Digital joint of right palpus looking upwards from the outer side. 
Adult male : length -^-th of an inch. 
Geneeal desceiption. —Cephalothorax black-brown ; legs yellow ; 
palpi yellow, digital joint yellow-brown; abdomen black. 
The cephalothorax has the caput very slightly elevated towards 
the ocular region, very much like that of W. Beckii , Cambr. The 
hind-central pair of eyes are about an eye’s diameter from each 
other, and placed transversely at the fore-margin of the elevation; 
the hind-lateral eye (on each side) is more than a diameter’s in¬ 
terval from each hind-central eye on its side ; and there is a long 
and slightly-curved tapering indentation running backwards from 
between the hind-central and hind-lateral eyes on each side. The 
height of the clypeus is about equal to half that of the facial space. 
* ‘ Proc. Zool. Soc.,’ 1872, p. 766, pi. lxvi, fig. 23. 
