1899.] iraw exotic aeau-bidba. 621 



Eyes unequal, the central quadrangle scarcely broader than lon^, 

 the anterior side shorter than the posterior. The eyes of both 

 the anterior and posterior rows appear to be about equally sepa- 

 rated. The height of the retreating clypeus rather exceeds the 

 diameter of the fore-central eyes. The fore-lateral eyes are much 

 the smallest. 



Legs neither long nor very strong, 1-2-3-4, furnished with 

 hairs and a few fine spines ; femora black, with a broad clear 

 whitish-yellow annulus near their base ; this annulus does not 

 extend, in the first pair of legs, beyond the auterior part and 

 sides ; the rest of the legs is brown ; the tibiae semi-annulated with 

 yellowish, the tarsi and metatarsi are palest, the hairs on the pale 

 aniiuli are grey. 



Palj^n similar in colours and markings to the legs. 



Falces powerful, vertical, roundly prominent at their base in 

 front. Colour deep shining brown. 



Maxillce and labium deep brown, tipped with pale yellowish-white. 



Sternum, deep brown, with small eminences opposite to the 

 insertion of the legs and clothed with adpressed grey hairs. 



Abdomen oval, obtuse anteriorly, broadest in the middle, sliglitly 

 promineut a little way above the spinners. Colour sooty-black, 

 with a somewhat velvety look, marked on the upperside with 

 yellowish-white oval and rouud spots of different sizes, forming a 

 regular pattern ; these spots are all clothed with silvery grey 

 hairs ; four form a square at the fore-side, followed by four other 

 smaller ones, towards the spinners, the first two in a transverse 

 line, and on each side of these are several others ; on each side of 

 the abdomen towards the spinners are some parallel irregular 

 white lines, and in front of them, near the spiracular plates, is a 

 rather large whitish-yellow patch. The underside is velvety black ; 

 at the middle on eacli side is a slightly curved longitudinal line of 

 small white spots, and across the middle are two parallel white 

 lines rather near to each other. Spinners short, compact, black- 

 brown, and on each side of their base are two yellowish-white 

 elongate spots. The genital aperture, in front of a small semi- 

 circular prominence, is rather inconspicuous but of characteristic 

 form. 



JIah. Singapore. Eeceived from Mr. H. JST. Eidley. 



POLTYS BIMACT7LATUS, sp. n. (Plate XXIX. fig. 4.) 



Adult female, length to posterior extremity 6 lines ; height 

 from extremity to summit of the abdominal elevation 10| lines. 



General form and structure normal. 



Cephalotliorax very gibbous both on the cnput and thorax. 

 Normal grooves and indentations very strong. Colour yellow, the 

 oblique indentations at the junction of the caput and thorax are 

 marked with a reddish line, and there is also a central longitudinal 

 one from the occiput to the thoracic indentation. The prominence 

 on which the central group of eyes is placed is furnished in front 

 and around with strong grey and black bristles. 



