532 REV. 0. P. CAMBRIDGE ON [Nov. 25, 
near the tropics ; possibly this may be due to the generally barren, 
rocky nature of the island. It will be very interesting to ascertain 
whether a closer search (which Mr. Melliss has promised to make) 
into the Spiders of St. Helena will sustain the general observations 
above made; equally interesting also to know whether such ob- 
servations are applicable to the Insect orders of the island. 
Fam. DyspERIDEs. 
Gen. SEGESTRIA. 
SEGESTRIA PERFIDA (Walck.), Hist. Nat. des Ins. Apt. tome i. 
p- 267. 
Segestria florentina, Hahn, Die Arachn. Bd. i. p. 5, t. 1. f. 1; 
Koch, Die Arachn. Bd. v. p. 72, t. 164. f. 385, 586. 
S. cellaria, Latr. Gen. Crust. et Ins. tome i. p. 88. 
Several adults of both sexes of this fine six-eyed Spider were con- 
tained in Mr. Melliss’s collection. Its usual habitat is in crevices of 
rocky banks and interstices of walls; in these it spins a silken tube 
of considerable length, at the extremity of which it resides. I 
found this species not unfrequent in the island of Corfu in 1864, in 
holes and crevices of ancient olive-trees, whence it was exceedingly 
difficult to dislodge them. They would suffer themselves to be 
crushed rather than quit their abode; and the only way by which 
I could obtain an uninjured specimen was by screwing a small stick 
with a jagged end into the web and carefully drawing the whole 
fabric out, upon the chance of the inmate coming out with it. 
Gen. DyspERA. 
DyspERA RUBICUNDA, Koch, die Arach. Bd. v. p. 79, t. 165. 
f. 390, 391. 
Though very difficult to be distinguished in the female sex from 
D. erythrina (Walck.), I feel but little doubt concerning the iden- 
tity of an adult female in the St.-Helena collection with D. rubicunda 
(Koch). 
Fam. DrassipEs. 
Gen. Ciusrona (B1.). 
CiuBIONA DuBIA, n. sp. (Plate XLII. fig. 1.) 
Female adult, length 4 lines. 
The prevailing colour of this species, like that of many others of 
the genus, is yellow, clothed more or less all over with short, some- 
what silky, yellowish-grey hairs. The cephalothorax is tinged with 
reddish, especially on its fore part, or caput; this portion is rather 
elongate, but yet broad and bluff at its fore extremity, much resem- 
bling the form of a British species, C. deinognatha (Camb.). The 
normal furrows and indentations are fairly marked, and are indicated 
by dusky lines, which converge to a small longitudinal indentation 
towards the hinder part ; two very fine dark longitudinal lines run 
