750 REV. O. P. CAMBRIDGE ON [June 18, 



clypeus is impressed immediately below the eyes, and slightly 

 prominent above the falces, and its height rather exceeds half that 

 of the facial space ; the lateral pairs of eyes are seated on strongish 

 tubercles, and the foremost one of each appears to be the largest of 

 the eight ; the space between those of the hind central pair is very 

 slightly smaller than that between each and the hind lateral on its 

 side ; those of the fore central pair are contiguous to each other, 

 and each is the same distance from the hind central on its side as 

 the hind centrals are from each other. The colour of the cephalo- 

 thorax and falces is yellow-brown, and that of the legs and palpi is 

 yellow. The legs are furnished with hairs, and are not very strong, 

 but moderately long; their relative length is 1, 4, 2, 3. The palpi 

 have the radial joint of peculiar and characteristic form ; it is stronger 

 than the cubital, and has a small, prominent, sharp spine-like 

 apophysis from its outer extremity ; its fore extremity is produced 

 into a slightly curved, strongish, obtusely pointed apophysis ; its 

 inner extremity is protuberant and strong, and from its hinder ex- 

 tremity there issues a strong, longish, curved, tapering, sharp- 

 pointed, spiny apophysis, which, curving over the palpal organs, 

 looks at first as if it were part of them ; but on closer inspection from 

 different points of view, its union with the radial joint is plainly 

 perceptible : the digital joint is of somewhat irregular form, having 

 a kind of flat-sided lobe near its base, the flattened side directed 

 outwards ; this peculiarity of structure reminds one of that of the 

 digital joint of Neriene subtilis (Cambr.), N. conigera (id.), and 

 others : the palpal organs are well developed, rather complex, and 

 are surrounded beneath by a long, slender, black spine, curved in a 

 circular form. The abdomen is of a dull blackish hue, tinged with 

 olive, and somewhat palest on the upperside, along which, towards 

 the hinder part, are visible (in spirit of wine) some fine transverse 

 angular lines, or chevrons. An adult female taken under the same 

 stone as the male, resembled it in colour and other general charac- 

 ters ; but the height of the clypeus was less, both positively and 

 proportionally, and the epigyne was prominent, but not much so : 

 possibly this may not be the female of the male above described. 



A single example of each sex was found by myself under a stone, 

 among the ruins of the Forum at Rome, in February 1865. 



Erigone (Neriene, Bl.) prominula, sp. n. (Plate LXV. 

 fig. 4.) 



Male adult, length ^ of an inch. 



The cephalothorax is of a deep black-brown colour, margined with 

 black ; the caput is rather prominent and produced ; the summit 

 of the elevated part slopes slightly and flattishly forwards, and the 

 occiput rather abruptly backwards. The height of the clypeus 

 (which is impressed at the middle, but prominent at the lower 

 margin) considerably exceeds half that of the facial space; the 

 normal furrows and indentations are well marked. 



The eyes are in four pairs, forming a transverse oval, and occu- 

 pying the whole extremity of the cephalic prominence ; those of the 



