Rainbow — Arachnida 241 



uiiexon : in addition to this there are some dark markings and spots, wliilst 

 the highest [)oiiit is surrounded h\- a small tulx-rcular eminence : sides creamy- 

 vellow. reticulated with \ellow brown ; inferior surface dull yellow-grey down 

 the median line, flanked with irregular l)laek markings; laterally cream-\ellci\v, 

 reticulated with }-ello\\- -brown. Epig^num small, slightly raised, and lia\iug 

 two somewhat pear-shaped pits. 



Several specimens were obtained, in \-arious stages of (le\elo|)ment. 

 Mature fnrnis, however, differ in size and in intensity of colouration, the 

 abdomen in some instances ha\-ing \'ery large black jjatches. Type. T. 11319. 



THERIDION ALBOSTRIATUM L.Koch. (N.I.) 

 THERIDION EXTRILADUM Keys. (X.l.) 

 THERIDION MUNDULUM L.Koch. (L.ll.l.) 

 THERIDION PROPERUM Keys. (L.H.I, and N.I.) 

 This is a most variable species in colour, ornamentation, and size. Si>me 

 of the specimens agree exacth with Keyserling's description and figures, 

 while others are so dark that the median alidominal marking is lost. Then, 

 again, others ha\-e the prominent median abdominal marking edged with 

 snowv-white in addition to scattered lateral white patches. The variation 

 is so great that no two e-x:am])les are e.xactly alike. The male, of which only 

 one sjiecimen was collected, has the cephalothorax yellow, with dark longi- 

 tudinal band as figured in the female liy Keyserling; the legs and palpi are 

 \ello\v with fuscous annulations, and the abdomen has the median ])atch 

 edged with black, and then with snowy-white: the sides are grey with black 

 and white markings. Some of the specimens were immature. 



THERIDION NIGRODECORATUM sp. nov. fL.ll.I.) 

 (PI. -\x\iii, figs. ,i5-.V. ) 



9 (^■e])halothorax, 1-8 mm. long, 1 '4 mm. broad; abdomen, 2-?i mm. 

 long, 1 v mm. broad. 



Cephalotliorax obovate, vellow, with a dark brown median bar running 

 from (K-ular area to median fovea, ])ubescent. Pars ce])halica arched, pubes- 

 cent, thoracic groove distinct; ocular area broader than long; clypeus narrow. 

 Pars thoracica strongly arched, radial grooves and median fovea distinct, 

 lateral and posterior angles pencilled with dark brown ; marg-inal band yellow. 

 Eyes normal. Legs moderately long, yellow, tapering, hairy, armed with 

 long, fine spines. Relative lengths, 1, 4, 2, 3. Palpi long, similar in colour, 

 clothing and armature to legs. Falces rather long, yellow, arched, parallel; 



