1899.] NEW BiOtIO AEANBIDBA. 62^ 



slightly flattened, but with a gibbosity at the base on the outer side ; 

 colour like that of the cephalothorax, and furnished in front with 

 granulations ; fangs short, base strong, the rest weak. 



Palpi short; radial joint about equal in length to the cubital ; 

 at its fore extremity on the outer side is a strongish apophysis 

 whose termination rather abruptly diverges outwards, and is 

 tapering, apparently somewhat concave, and its point slightly 

 obtuse or not very sharp ; another apophysis on the underside is 

 short, broad and obtuse. Digital joint of moderate size and broad- 

 oval form. Palpal organs consist of a large, simple, prominent 

 circular corneous lobe, forming a strong whorl with a long slender 

 spine issuing from its posterior extremity and encircliug the lobe 

 round its inner and on to its outer side, in close contact with the 

 margin of the digital joint. The colour and armature of the palpi 

 are similar to those of the legs. 



Maxillcp., labium, and sternum similar in colour to the cephalo- 

 thorax ; the two latter, however, are slightly suffused -oith blackish. 



Abdomen short, broad, broadest behind, tolerably convex, fur- 

 nished with short strongish spiny bristles on the upper margins, 

 those above the spinners issuing from small tubercles. Colour 

 yellow-brown, obscurely marked and suffused with blackish ; on 

 each side towards the hinder extremity are some obscure, roundish, 

 dull yellow-brownish spots disposed in several oblique rows. 

 Spinners short, inferior pair strongest. Anal tubercle strong and 

 2-jointed. 



Hah. Ceylon. Received from the late Mr. G. H. K. Thwaites. 



BoLiscus DECiPiEKS, sp. n. (Plate XXX. fig. 9.) 



Adult female, length 1| lines or 3'5 mm. 



Ceplialotliorax as broad or broader than long, very convex and 

 highest at the beginning of the hind slope, which is abrupt and 

 steep ; thence to the fore-margin of the clypeus the profile forms 

 an even but not very strong curve. The height of the clypeus 

 is less than half that of the facial space. Colour brownish yellow 

 mottled with red-brown, darkest on the sides. The surface is 

 covered with granulations and small tubercles ; on each side of 

 the hinder slope is a small but rather conspicuous group of 5-6 

 small conical white tubercles. 



The eyes are small, and in two transverse curved lines forming 

 a large crescent-shaped area similar to that of PliiJodromvs. The 

 anterior row is the shortest and its curve the strongest ; the 

 convexity of the curve is directed forwards ; the lateral eyes are 

 larger than the central, the fore-laterals largest, the hind-centrals 

 smallest ; these last are distinctly farther from each other than 

 from the hind-laterals ; the central quadrangle is broader than long, 

 and its anterior side shortest ; the eyes of the anterior row are 

 more nearlj^ equally separated, the fore-central pair being perhaps 

 rather nearer to each other than to the fore-laterals. 



Legs short, robust, 2-1-4—3, angulose ; but little difference in 

 length between those of 2-1 and 4—3 respectively, the last being 



