128 



form (from Dorey), and in the table this (except that the 

 apical parts of the elytra are somewhat diluted with red) 

 would be referred to E, and associated with the variety zz 

 of didyma, with which, however, it has very little connec- 

 tion. In size and (except for the paler prothorax) general 

 appearance it appears close to melvillensis, but the flanks of 

 the prosternum are not striated from base to apex as on that 

 species. 



Rhyparida maculicollis, Baly. 



PL vi., figs. 31 and 32. 

 The two conspicuous spots on the prothorax of this species 

 vary considerably in size, and from one of the numerous 

 specimens in the Museum are altogether absent. The legs 

 are occasionally almost entirely pale, but frequently the 

 knees (very rarely the entire femora), tibiae (wholly or in 

 part), and tarsi are black or infuscated. The abdomen is 

 usually paler than the metasternum. The sides (except in 

 front) and base of prosternum are rather faintly but dis- 

 tinctly striated. 



Rhyparida mastersi, Blackb. 



PI. vi., figs. 33 and 34. 



Structurally this species is extremely close to maculi- 

 colUs, and the colours are usually exactly; alike (the ground 

 colour varies on individuals from a rather dark-straw colour 

 to almost ruby-red), although the markings are strikingly 

 different. Both forms also have the prosternum close to the 

 coxae and about the base with fine striae ; more conspicuous 

 on some specimens than on others. The type was described 

 as having unarmed femora, and those of a co-type in the 

 Museum are certainly unarmed ; but several specimens 

 coloured exactly the same have the hind femora minutely 

 dentate, the tooth invisible from most directions. 



Rhyparida interioris, Blackb. (?) 



The type of interioris (now in the British Museum) was 

 the only specimen of the species known to the late Rev. T. 

 Blackburn. There is now before me a specimen from Mount 

 Painter (close to Leigh Creek) that I hesitate to regard as 

 distinct from it, although most of its under-surface and the 

 apical half of the antennae are infuscated (these, however, 

 are common variations). But its eyes are widely separated, 

 Tvhereas they should be closer together than usual. I think 

 it probable, however, that the eyes are sexually variable in 

 size and distance, as they certainly are in several species of 

 which I can be sure of the sexes. 



