of the Suhfamily Dynastinre. 269 



cJ , capite baud carinato, fronte tuberculo minuto retrorsnm in- 

 clinato medio instructo; pronoto antice Icviter transversim iin- 

 presso, linea submarginali, medio vix angulata, inciso. 



Long. 19 ram. ; lat. max. 10"5 mm. 



Hah. N. Australia : Carpentaria. 



A male specimen in the Museum was obtained by the hite 

 Alexander Fry. 



The species resembles D. I'nermi's, Blackb., but is smaller ; 

 the clypeus is rounded in front, and has a mijiute backward- 

 pointing tubercle, but no carina ; the incised line behind the 

 front margin of the pronotum has no diverticulum in the 

 middle, and the base is not maroined. The maxilla3 are 

 armed only with minute and feeble tubercles instead of the 

 strong teeth found in the typical species of the genus. 



Dasygnathiis hospef, sp. n. (Plate XIII. fig. 12.) 



Castaneua, nitidus, subtus fulvo-hirsutus ; modice elongatus, con- 

 vexus, elytris subglobosis, post medium ampliatis ; capito trans- 

 versira rugoso, clypeo mediocri, antice reflexo, leviter arcuato ; 

 pronoto parce sat minute punctato, ad latera anguste ruguloso, 

 his fortiter arcuatis, angulis anticis sat acutis, posticis fere 

 obsoletis, basi immarginato ; elytris fortiter sulcatis, aulcis vage 

 punctatis, spatio sublatorali irregulariter punctato ; pygidio 

 crebre punctato : 

 S , capita vix cariuato, fronte tuberculo minuto reclinato medio 

 instructa ; pronoto antice vix impresso, linea submarginali, medio 

 breviter acute angulata, inciso. 



Long. 17 mm.; lat. max. 10 mm. 



Hah. Queensland. 



A single male was taken during the 'Challenger' Ex- 

 pedition. 



It is like D. impotens, but less elongate, more convex, 

 with the elytra shorter, narrowed at the shoulders, and 

 broader and more rounded behind. The clypeus is a little 

 wider, the pronotum more convex, less produced in front, 

 and the front marginal stria is sharply angulated in the 

 middle. 



Blackburn, in reviewing the species of Isodon, admitted 

 liimself unable to identify /. {'' Ileteronychus^') lucidus and 

 /. yicipennis, of Macleay, but the latter's descriptions exactly 

 fit the female and male respectively of I. pecuarius, Reiche, 

 the most widespread member of the genus. The head and 

 pronotum are not uncommonly almost black in the male of 

 that species, and in the female a minute tubercle may or may 

 not be visible upon the pronotum. Mistaking the real sexual 

 diilerences for generic, i\lacleay looked for both sexes amongst 



