338 Mr. J. Blackwall on new Species of Arancidca 



papillre on their inferior surface, and the latter are terminated 

 by two curved claws, pectinated at their base. The palpi are 

 long, and resemble the legs in colour; and the digital joint, 

 which is strongly tinged with brown, has a short, curved, pecti- 

 nated claw at its extremity. The cephalothorax is truncated 

 in front, compressed before, and rounded on the sides, which 

 are depressed and marked with furrows converging towards a 

 narrow indentation in the medial line of the posterior region ; it 

 is clothed with hairs, and of a brown colour, with a broad yel- 

 lowish-brown band (whose superior margin is somewhat dentated) 

 extending along each side, and a narrow longitudinal one in the 

 middle, which comprises a fine brown line in its anterior part. 

 The falees are powerful, conical, vertical, and densely clothed 

 with yellow hairs at the base in front ; the maxillae are straight, 

 enlarged at the extremity, which is rounded on the outer side, 

 and obliquely truncated on the inner side, where it is supplied 

 with long hairs ; and the lip is short, broad, and somewhat 

 quadrate, but rounded on the sides. These parts have a red- 

 brown hue, the falees being much the darkest. The sternum 

 has a broad oval form, with small eminences on the sides, oppo- 

 site to the legs ; it is thinly clothed with long hairs, and of a 

 dark-brown hue, with a faint tinge of yellow in the medial line. 

 The abdomen is oviform, hairy, convex above, and projects a 

 little over the base of the cephalothorax j it is of a dull pale- 

 yellow colour, streaked and spotted with brown, the under part, 

 which is the yellowest, being marked with the fewest and smallest 

 spots ; a bi*oad, dentated, dull-yellow band, bordered with brown, 

 and comprising a longitudinal row of irregular brown spots, ex- 

 tends along the middle of the upper part, and on each side of it 

 there is a series of brownish- black spots ; the sexual organs are 

 moderately developed, with a large process directed backwards 

 from their anterior margin, whose extremity is dilated; these 

 organs, with the branchial opercula, are of a brownish-yellow 

 colour, the latter being the paler. 



The collection contained six females of this species, five of 

 which were immature. 



Genus Pasithea, Blackw. 

 Pasithea pulchra. 



Length of the female -f-f.ths of an inch ; length of the cephalo- 

 thorax -fV, breadth ^ 5 T ; breadth of the abdomen -pVj length of 

 an anterior leg 1-^; length of a leg of the third pair 1^. 



The eyes are unequal in size, and disposed in three transverse 

 rows on the anterior part of the cephalothorax, high above its 

 frontal margin; the four posterior ones form a curved row 



