1 88 OX NKW AXD RARE BRITISH ARACHNIDA. 



Nothrus biearinatus, C. L. Koch. 

 Hypoethonius rufulus, C. L. Koch. 

 Hyploderma (Hophlophora) magnum, Nic. ; also Blox- 



worth district (O. P. Cambridge). 

 dasypus, Duges. 



NOTES AND DESCRIPTIONS OF Two OF THE 



FOREGOING ARACHNIDA. 



ARANEIDEA. 

 Diblemma, gen. nov. 



Allied to Opopcca, Sim., which it resembles in general form and 

 appearance; but differs from it (as well as from all other known 

 genera of the Oonopida) in having only two eyes. These are 

 placed at the fore extremity of the caput, near together in a 

 transverse line, and very close to the lower margin of the clypeus. 

 The legs are destitute of spines, being furnished with hairs only. 

 The abdomen has both dorsal and ventral chitinous plates or 

 scuta. These extend, in some examples, quite to the spinners, in 

 others not quite reaching them ; in some examples these plates 

 are of equal length, in others of slightly different lengths. On 

 each side of the sternum (which is oval, obtusely pointed behind) 

 are three converging narrow indentations running inwards nearly 

 half-way to the middle. They begin respectively from between 

 the basal joints of the first and second, the second and third, and 

 the third and fourth pairs of legs. Possibly they may only be of 

 specific importance. 



Diblemma Donisthorpii, sp. n. 



Adult male, length i-i6th of an inch. 



Cephalolhorax, oval, obtusely pointed before, slightly hollow- 

 truncate behind ; of uniform moderate convexity, and very slightly 

 impressed on the lateral margins at the caput. The profile line 



