574 RKV. O. p. CAMBRIDGE ON NEW ARANEIDEA. [June 19, 



to these curious points of structure would at once fail if an undoubted 

 Dinopid were found without them. 



Gen. nov. Avella. 



Cephaiothorax longer than broad, oval behind, constricted late- 

 rally at the caput, and truncated in front ; the lower corners of the 

 clypeus prolonged into eye-bearing tubercular prominences ; u]iper 

 surface much flattened, the thorax and caput being on the same low 

 level. The caput runs in a straight line to the middle pair of eyes, 

 when it drops abruptly, at right angles, to the falces. 



Eyes small, in three transverse rows, 4, 2, 2, and not differing 

 greatly in size ; the foremost row (of four) is strongly curved, the 

 convexity of the curve directed backwards ; the laterals of this row 

 are placed at the extremity of cyhndrical tubercles springing from 

 the corners of the clypeus. Those of the second row are a httle the 

 largest of the eight. Those of the third or posterior row form a 

 line not nearly so long as that formed by those of the first row. 



Legs long, slender ; relative length 1, 2, 4, 3—1 and 2 greatly ex- 

 ceeding 3 and 4 in length ; the tarsi of the first pair subdivided. 

 Each tarsus ends with three curved claws, of which the superior 

 pair are pectinated ; and there is a calamistrum on the metatarsus of 

 each of the fourth pair. 



Falpi short, slender, and terminating with a single curved pecti- 

 nated claw. 



Falces long, strong, and divergent. 



MaxillcB long, strong, considerably constricted just above the 

 insertion of the palpi, and thence greatly divergent, or bent outwards, 

 and rounded at their extremities. 



Labium oblong but broader at the base than at the apex, which is 

 truncated ; its length slightly exceeds one half tliat of the maxillae. 



Sternum of a somewhat subtriangular form, but much elongated. 



Abdomen long, broadest in the middle, where there is a strong 

 prominence on each side, with a supernumerary mamillary organ in 

 front of the ordinary spinners. 



Avella despiciens, sp. n. (Plate LVII. fig. 10.) 



Adult female, length rather over 4 J lines. 



The cephaiothorax is of a yellow-brown colour, with a broad 

 central longitudinal baud of a paler hue ; this band runs through to 

 the central pair of eyes ; it is rather wider on the caput than on the 

 thorax, and is thickly clothed with a grey pubescence, the rest of 

 the cephaiothorax being thinly clothed with similar pubescence. 

 The area comprised by the six foremost eyes is of a rather chocolate 

 red-brown colour. 



The e>jes may be described not only as in three transverse rows, 

 but as also in two quadrangular figures, a large one with a small one 

 in the middle of it ; the foremost pair of the central quadrangle 

 are the smallest of the eight, and separated from each other by 

 about three diameters, and from the hinder pair by about two ; the 

 hinder pair are considerably larger and form a longer line than the 



