484 



Sternum smoky-yellow, very slightly arched, triangular, and 

 terminating obtusely between fourth pair of coxae. Abdomen 

 somewhat ovate, large, boldly projecting over base of oephalo- 

 thorax, sooty-black above, laterally, and beneath ; on the 

 inferior surface, from the rima epigasteris to spinnerets there 

 is on each side a wavy, irregular, dull-yellow line, which 

 latter is broadest in front and at the middle, and narrowest 

 in front of spinnerets ; midway between the rima epigasteris 

 and spinnerets there is a broken transverse line ; chitinous 

 plate above rima epigasteris, yellow. Epigipntm a short, 

 broad, yellow, transverse, moderately-arched plaque (fig. 1). 

 Spinnerets yellow. 



Hah. — Cooper Creek. 



Theridion idiotypum, (2) n. sp. 

 PI. xxxii., figs. 2-4. 



d. Cephalothorax 1*7 mm. long, 1*1 mm. broad; 

 abdomen 2'5 mm. long, 1*1 mm. broad (fig. 2). 



Cephalothorax obovate, yellow, smooth. Pars cephalica 

 arched, segmental groove distinct, finely dotted with dark 

 brown down the middle ; ocular area broader than long, 

 occupying entire width of front of cephalic segment ; clypeus 

 pale yellow, nearly white. Pars thoracica distinctly arched, 

 rather darker than thoracic segment, radial grooves faintly 

 distinct, finely dotted sub-laterally with dark brown ; mar- 

 ginal band pale yellow, broad. Eyes black, prominent, 

 normal. Legs long, yellow, slender, tapering, and armed 

 with moderately long, fine, dark spines ; relative lengths, 

 1, 4, 2, 3. Palpi short, concolorous with legs; genital bulb 

 large, moderately hairy, exceedingly complicated (fig. 3). 

 Falces pale yellow, arched, acuminate. Maxillae pale yellow, 

 almost white, shining, arched, apices acuminate and directed 

 outwards. Labium short, broad, arched, slightly darker than 

 maxillae. Sternum triangular, slightly arched, impressed, 

 yellow, clouded with smoky-brown laterally, acuminate, term- 

 inating between fourth pair of coxae, lateral angles dark 

 brown. Abdomen oblong-ovate, slightly overhanging base of 

 cephalothorax, arched, superior surface chalk} 7 -white, orna- 

 mented with irregular yellow median markings and reticula- 

 tions ; sides have the upper part chalky-white also reticulated 

 with yellow, and the lower part yellow with dark-brown wavy 

 pencillings (fig. 4) ; inferior surface yellow, spotted with dark 

 brown, and bordered laterally and posteriorly with an 

 undulating and interrupted band of chalky-white. 



Hab. — Cooper Creek. 



l2) t&oTU7ros = with peculiar markings. 



