1879.] ARACHNIDA FROM MADAGASCAR. 733 



from the commencement of the depression on each side ; caput 

 covered sparsely with long depressed hair, directed forward and pro- 

 jecting beyond the anterior margin ; a central shallow rounded de- 

 pression ; oculiferous tubercles prominent, the central one X-shaped, 

 the anterior'pair of eyes much larger and wider apart than the posterior 

 pair ; the lateral tubercles slightly oblique, the anterior eyes upon 

 them being larger than the posterior ; abdomen broad, oval, hairy 

 in front ; epigyne linguiform, with a well-defined marginal ridge ; pec- 

 toral shield pentagonal ; falces acutely quadridentate on each interior 

 margin, the third denticle from the proximal extremity being largest, 

 movable fang curved and tolerably powerful ; palpi hairy ; legs 

 rather hairy, their relative length being 1, 2, 4, 3, the second and 

 fourth pairs nearly equal. Length of cephalothorax and abdomen 

 together 10 millimetres. 

 Antananarivo (Kingdori). 



Pyresthesis, n. gen. (Thomisid&y . 



Apparently nearest to Loxobates, Thorell. 



Length of cephalothorax rather greater than the width behind, 

 and half as wide again as, the caput ; dorsal surface to a little beyond 

 the middle nearly flat, slightly sloping forwards, behind the middle 

 abruptly sloping backwards ; height just behind the middle equal 

 to width at widest part ; eyes occupying the whole anterior por- 

 tion of the caput, oculiferous tubercles only indicated by little 

 connecting ridges between the eyes ; eyes arranged in two arched 

 series, the anterior lateral eyes being the largest and the posterior 

 lateral the smallest ; central eyes forming a nearly perfect quadrangle ; 

 front margin of caput rounded, unarmed ; external margin of 

 falces with a smooth longitudinal ridge; legs very slightly compressed, 

 nearly cylindrical, short, with a few scattered bristles but no di- 

 stinct spines ; abdomen globular, very slightly longer than broad, 

 very slightly convex below. 



Type P. cambridgii. 



9. Pyresthesis cambridgii, n. sp. (Plate LVIII. figs. 6, 6 a, 

 6 b, 6 c.) 



2 . Cephalothorax black, tibiae banded with yellow ; coxas oliva- 

 ceous ; abdomen above yellow, with scarlet border ; the yellow area 

 crossed by three transverse broad black bands, the first and second of 

 which are connected in the centre by a short longitudinal band, and 

 the second and third at their extremities ; the first of these bands is 

 arched, and the two others are slightly angulated and clavate at 

 their extremities ; a fourth very abbreviate and disconnected trans- 

 verse band followed by a rounded black spot upon the posterior area ; 

 under surface dark olivaceous. 



Cephalothorax smooth, with scattered hairs upon the caput, the 

 central oculiferous tubercle indicated by a slight swelling of the sur- 



1 The Eev. O. P. Cambridge, to whom I sent a sketch of this Spicier, writes 

 that it " would seem to be near Syurma, Simon ; but the thoracic region is ap- 

 parently too much elevated for that genus." 



