Mr. F P. Pascoe on some Australian Colydiidae. 463 



terize this species ; the interstices also have scarcely any traces of 

 the finer punctures which arc so obvious under a good lens in D. 

 fossus and D. viduatus. 



Deretaphrus viduatus. 



D. niger, subnitidus ; prothoraco fortiter punctato, interrupte canaliculato; 

 elytris interstitiis quinto et septimo costatis ; pedibus piceo-nigris. 



Hub. Adelaide. 



Black, subnitid ; bead and prothorax strongly pimctured, the latter 

 with a deeply impressed, interrupted longitudinal canal, with the 

 anterior portion narrow, but well defined ; elytra less nitid than the 

 prothorax, seriate-punctate, the interstices towards the suture scarcely 

 raised, except at the apex and base, the fifth, sixth, and seventh form- 

 ing strongly marked costae, especially the fifth and seventh, the punc- 

 tures large, round, and at regular intervals; body beneath black, 

 shining, coarsely punctured ; legs pitchy black. Length 5 lines. 



Darker and less glossy than Deretaphrus fossus, the prothorax 

 narrower, the third interstitial line especially not prominent, and 

 the punctures between them more regular in form and more equally 

 distributed ; in both species the interstices themselves have each a 

 fine row of small punctures. 



Deretaphrus Bakeivellii. 

 D. angustulus, rufo-fuscus, nitidus ; prothorace subtiliter punctato, pro- 

 fimde interrupte canaliculato, lateribus antice rotundatis ; elytris striato- 

 punctatis, interstitiis altemis elevatis. 

 Hub. Melbourne, Sydney. 



Narrow, dark reddish brown, glossy ; head and prothorax minutely 

 punctured, the latter with a deeply impressed, interrupted longitudinal 

 line, the anterior portion very short, but deep and well defined ; elytra 

 seriate-punctate, the third, fifth, and seventh interstices forming elevated, 

 costaaform lines ; body beneath brownish pitchy, with shallow, scattered 

 punctures ; antenna? and legs reddish pitchy. Length 5 lines. 

 A more slender form than Deretaphrus piceus, with the prothorax 

 proportionally more constricted at the base, and more rounded ante- 

 riorly, of a decidedly reddish-brown colour, and more glossy. 



Deretaphrus colydioides. 

 D. angustus, subcylindricus, nigro-piceus ; prothorace fortiter punctato, 

 interrupte canaliculato, canaliculo antico minuto ; elytris striato- 

 punctatis, interstitiis alternatis elevatis, striis fortiter punctatis. 

 Hub. Sydney. 



Narrow, approaching to cylindrical, pitchy black ; head and pro- 

 thorax coarsely punctured, the latter with a somewhat shallow, but 



