331 



Ophryota rapax, Blackb. 

 This species is readily distinguished from the others of 

 the genus by a conspicuous stout spine on the spur at the apex 

 of the front tibiae < 42) ; the other tibiae are also spurred, but 

 much less conspicuously so. There is a distinct tubercular 

 lobe beneath each eye. Specimens are in the Museum from 

 Central Australia (marked as a co-type), Lake Callabonna, 

 and the Elder Expedition. (43) 



Medicasta. 



The typical species of this genus is at present unknown to 

 Australian workers. In the original description the third 

 tarsal-joint was said to be "vix lobato," but in a figure (pi. 

 xviii., fig. lie) it is shown as rather deeply bilobed, and wider 

 than the second. In a table given subsequently (44) it was 

 distinguished from Ethemaia by "tarsi linear." 



The late Rev. T. Blackburn referred two species to it. 

 Of the first ( 45 ) he was somewhat doubtful, and before 

 describing the second species he commented on the possibility 

 of its being really a HyplupriaS^ I have myself referred one 

 species to the genus, but am now dubious to its having been 

 correctly placed there ; there are before me several other 

 species that are congeneric with it, but till the doubts con- 

 cerning the typical species are cleared up, it appears better 

 to leave these undescribed. 



Platypterocis, n. g. 



Head short, armed between eyes. Eyes lateral, almost 

 round, moderately faceted. Rostrum short and stout. Scrobes 

 deep, terminated some distance in front of eyes. Antennae 

 short and stout; funicle with all the joints, except the first, 

 strongly transverse, seventh subadnate to club, the latter 

 ■scarcely as long as the two preceding joints combined. 

 Prothorax transverse, ocular lobes very feeble or absent. 

 Scutellum absent. Elytra wide, subcordate. Metasternum 



(42; This spur is sometimes bifid at the apex, but frequently 

 simple. 



(43) One of the latter is marked as a co-type of Aparete nodosa, 

 and its resemblance to the type of that species is extraordinary, 

 but the spurred tibia? are at once distinctive. 



(44)Journ. Linn. Soc, 1871, p. 168. 



(45) The type of this species, lugubris, is in the South Aus- 

 tralian Museum ; it is an Oxyops. 



(46) The description of this species, obscura, reads much like 

 that of one quite closely allied to H. assimilis, nor am I at all 

 •certain but that it was founded upon a specimen of that some- 

 what variable and widely distributed species. 



