386 EEV. O. V. CA.MBR1DGE ON OEYLON SPIDKES. 



the spines there are on its upperside some long slender pale hairs di- 

 rected backwards. 

 A single adult S of this very distinctly marked Theridion was 

 contained in Mr. Nietner's collection. The peculiarity of the four 

 superabdominal spines at once distinguishes it from all the species 

 of this genus yet known to me. 



Theridion albomacui.osum, n. sp. PI. XII. figs. 57 to 60. 



? immature, length f of a line. 



Cephalothorax of ordinary form ; colour yellow, with a slender black 

 marginal line and a short, medial, longitudinal, dusky streak on the 

 hinder part of caput, ending in a small, somewhat diamond-sha[)ed, 

 dark patch at the junction of the thoracic segments. 



Eyes in four pairs, or two equally curved rows, the front row shortest, 

 and the curves directed from each other ; the two central pairs form a 

 square whose fore side is very slightly longer than the hinder one ; 

 the lateral pairs are seated on slight tubercles, and the fore eye of 

 each is nearer to that of the fore central pair on its side than the 

 hinder one is to that of the hind central pair on its side : the colour 

 of the fore central pair is black, the rest are pearl-white with black 

 margins. 



Legs rather long, slender, furnished with hairs and a very few slender 

 black spines : relative length 1, 4, 2, 3, decreasing in about equal 

 proportion ; their colour is a pale whitish yellow ; the genua and ex- 

 tremities of the tibifie are tinged with orange, and the extremities of 

 the first and second pairs are blackish, those of the first pair being 

 most conspicuously so. 



Palpi short, furnished with hairs, and of a pale yellowish colour. 



Falces not very long, nor strong ; maxillcB long and strong, inclined to- 

 wards the labium, and projecting a little bej'ond the extremities of the 

 falces, and obliquely truncate on their outer extremities. 



Labium short, and somewhat roundish at the apex ; these parts, with 

 the sternum (which is broad and heart-shaped), are of a pale yellowish 

 colour. 



Abdomen short, oval, very convex above, and elevated behind (similar in 

 form to that of Theridion sisyphum), of a pale yellowish colour, tinged 

 with yellow-brown above, and yellowish beneath : the upperside has a 

 distinctly defined pattern, formed by cretaceous-looking white spots 

 and blotches, and a few blnck spots on either side of the fore part 

 showing traces of some broken oblique lines ; a few other small black 

 spots appear here and there on the sides and upper part, which are 

 furnished with longish, slender, bristly hairs ; the pattern alluded to 

 may be described as consisting of six large roundish white spots in 

 the centre, the two fore ones on either side running into each other 

 on their inner sides : the two hinder spots are separated by only a 



