IIEV. O. P. CAMBRIDaE ON CETLON SPIBEHS. 375 



Fam. DEASSIDES. 



G-en. CiiEiEA-CANTHiuM (Koch), Cluliona (Bl.). 



Cheiracanthium incertum, n. sp. ? PI. XI. fig, 9. 



? adult, length 3 lines. (Another individual exceeded 4 lines.) 



Cephalothorax oval, hroader before than behind, also truncate before and 

 slightly compressed on the sides ; it is much arched above, and the 

 profile line of caput and thorax describes a strong curve; the junc- 

 tion of these two portions is well marked, but the other normal fur- 

 rows and indentations are less strongly defined. Its colour is yellow, 

 darkest forwards, and suffused with brown at the eyes ; it is very spa- 

 ringly furnished with hairs. 



Eyes in two transverse nearly straight rows near the fore margin of the 

 caput, and rather close to each other ; they are small, and do not differ 

 greatly in size, those of the hinder row are almost equidistant from 

 each other, those of the fore central pair are visibly nearer to each 

 other than each is to the fore lateral eye on its side ; those of each 

 lateral pair are almost contiguous, and are obliquely situated on a small 

 tubercle. 



Legs moderately long, and not very strong; colour pale yellow, spa- 

 ringly furnished with hairs and a few small black spines ; the latter 

 principally on the metatarsi and tarsi ; the latter terminate with two 

 curved black pectinated claws, beneath which is a tuft of black hairs. 

 Relative length 1, 4, 2, 3. 



Palpi rather long, slender ; digital joints long, and slightly enlarged at 

 their extremity, which is suffused with brownish ; otherwise the colour 

 of the palpi is similar to that of the legs. 



Falces long, strong, nearly perpendicular : prominent near their base in 

 front, and excavated near their extremities on the inner side. Colour 

 deep rich glossy brown. 



Maxillce long, straight, parallel, enlarged and rounded at their extre- 

 mities. 



Labium rather more than half the length of the maxillae ; oval in form, 

 and truncate at the apex, which is slightly emarginate. The colour of 

 the maxillae and labium is a deep yellow brown, palest at their bases 

 and extremities. 



Slernum heart-shaped, sparingly furnished with hairs, and of a yellow 

 colour. 



Abdomen oval, longer than cephalothorax, over base of which it projects 

 considerably ; it is of a pale dull yellowish colour, furnished with hairs 

 and with a few long, fine, erect, blackish bristles on the upperside; 

 the sexual organs are simple in form and of a reddish-brown colour 



Two adult females were contained in the collection received 

 from Mr. Nietner. 



