462 Mr. F. P. Paseoe on some Australian Colydiidoe. 



repetition, noticing those characters which either belong to the 

 genus, or which are so slightly modified as scarcely to be appreciated 

 even when neighbouring species are contrasted with one another. 

 For the generic characters, so far as they relate to Deretaphrus and 

 Bothrideres, I must refer toM. Lacordaire's 'Genera des Coleoptcres," 

 ii. pp. 377-78, where they will be found carefullj- and accurately de- 

 tailed. Penthelispa is described in this Journal, p. Ill : its species 

 are found in all parts of the world, except Europe. 



Table of the Species of Deretaphrus. 

 Prothorax with a sharply defined longitudinal impressed line or canal. 

 Prothorax coarsely punctured. 

 Elytra subdepressed. 



Third interstitial line strongly elevated or eostseform. 

 Interstitial lines finely punctured ; pitchy 



black, subnitid D. fossus. 



Interstitial lines scarcely punctured ; rufous 



brown, opake D. ignarus, n. s. 



Third interstitial line not elevated D. viduatus, n. s. 



Elytra narrower, subcylindrical- D. eolydioides, n. s. 



Prothorax finely punctured. 



Pitchy black, shining ; broader D. piceus. 



Dark chestnut, or rufous brown, glossy ; narrower 1). Bakeicellii, n. a. 

 Prothorax with a shallow longitudinal impression . . D. EricJisoni. 



Deretaphrus Wollastoni, Newm. (Zool. 1855, App. ccx.), appears 

 to be characterized bya" ridge or keel " parallel with and on each 

 side the median impression. 



Deretaphrus ignarus. 



D. obscure rufo-fuscus ; prothorace fortiter pimctato, canaliculo antico 

 obsoleto ; elytris interstitiis (duobus intends exceptis) costatis ; pedibus 

 ferrugineis. 



Hah. Sydney. 



Dull rufous brown ; head and prothorax strongly punctured, the 

 latter with a sharply impressed, longitudinal canal, scarcely extending 

 beyond its basal half, no anterior canal, but a shallow depression 

 instead ; elytra seriate-punctate, the interstices, except the two inner, 

 raised into strongly marked costa?, especially the basal portions of the 

 third *, fifth, and seventh, the punctures large, and at regular intervals ; 

 body beneath reddish pitchy, rather coarsely but not closely punctured ; 

 legs ferruginous, subnitid. Length 5 lines. 

 The dull rufous-brown colour and the single prothoracic canal, 



together with the elevated costee on the elytra, sufficiently charac- 

 * The sutural line is counted as the first. 



