Mr. F P. Pascoc on some Australian Colydiidai. 463 



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

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

 fussiis and D. vUluatus. 



Deretaphrus viduatus. 



D. uiger, subnitidus ; prothorace fortiter punctate, interrupte canaliculate; 

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



Huh. Adelaide. 



Black, subnitid ; head and protliorax strongly puucturcd, the latter 

 with a deeply impressed, interrupted longitudinal canal, with the 

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

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

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

 ing strongly marked costse, especially the fifth and seventh, the pimc- 

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

 shiuuig, coai'sely punctured ; legs pitchy black. Lengih 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 regidar in form and more ecpially 

 distributed ; in both species the interstices themselves have each a 

 fine row of small punctures. 



Deretaphrus BaTcewellii. 



D. angustulus, rufo-fuscus, nitidus ; prothorace subtilitor punctate, pro- 

 fundo interrupte canalicidato, lateribus antice rotundatis ; elytris striato- 

 punctatis, interstitiis alteruis elevatis. 

 Hah. Melbom-ne, Sydney. 



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

 punctured, the latter with a deeply impressed, iuteiTupted longitudinal 

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

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

 costffiform lines ; body beneath bro-svnish pitchy, with shallow, scattered 

 punctm-es ; antennae 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 coi^ dioides. 

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

 inteiTupte canaliculate, canalicido autico minuto ; elytris striato- 

 punctatis, interstitiis altematis elevatis, striis fortiter punctatis. 

 Hah. Sytlney. 



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

 thorax coarsely punctm-ed, the latter with a somewhat shallow, but 



