309 



median line well defined throughout ; with dense but sharply- 

 defined punctures, becoming crowded on sides. Elytra 

 scarcely wider than extreme base of prothorax, parallel-sided 

 to beyond the middle ; with crowded punctures throughout, 

 but somewhat larger about base than elsewhere ; striation 

 •well defined, becoming deep about apex and sides. Abdomen 

 with a feeble depression towards each side of each segment. 

 Length, 6 J mm. 



Hab. — Queensland: Mount Tambourine (A. M. Lea). 

 Type, I. 5743. 



A small black species, but readily distinguished from 

 nana by the conspicuous median prothoracic line. The ser- 

 rations of the antennae are very feeble. A specimen from 

 the Blackall Ranges (H. Hacker's No. 897) differs from the 

 type in having the elytra and part of the antennae obscurely 

 diluted with red, and with the tarsi of a rather bright 

 castaneous. 



Table of species known to me: — 



Presternum with a shalloAv channel on each 



side, but acutely bounded outwardly ... concolor 



Prostei'iium not so channelled. 



Abdomen strongly longitudinally excavated on 

 each side of middle. 

 The excavations terminate on the third 



segment ... ... ... ... ... ventralis 



The excavations terminate on the fourth 



segment ... ... ... ... ... longicornis 



Abdomen not longitudinally excavated. 



Third joint of antennae much shorter than 



fourth kraatzi 



Third joint slightly longer than fourth, or 

 at least almost as long. 

 Prothorax with a distinct median line ... median a 

 Prothorax without such. 



Elytra black ... ... ... ... nana 



Elvtra not black (7) 1™?^'. 



I nigricans 



Dyscolocerus. 

 To this genus, proposed by Bonvouloir upon a single^ 

 species from Sumatra, Blackburn has added three species and" 

 I have added one and know several others; but it is probable 

 that all the Australian species will eventually be considered 

 as belonging to a new genus. 



Dyscolocerus concolor, Blackb. 

 There are in the Museum three co-type males of this 

 species. Blackburn described the sexes as differing in the 

 apical segment of abdomen, that of the male being lightly 



W On some large females of nigricans the elytra are almost 

 black. 



