129 



remarkable for its cylindrical form ; and I do not find any very 

 noticeable difference in form between this and other species. 



Victoria (taken by Miss "Waterhouse near Ballarat). 



2>. viduaius, Pasc. I have several examples taken near Ade- 

 laide (the original locality) which agree with Pascoe's brief 

 description and are no doubt the species to which he gave this 

 name. It is near the preceding (D. crihriceps) but differs as 

 specified above. Its head is evidently larger than that of 

 crihriceps and is non-rugulosely and less closely punctulate, with 

 a well marked longitudinal median impression traversing the 

 clypeus and produced hindward more or less behind the clypeal 

 suture. Pascoe's brief description does not refer to the third 

 interstice of the elytra in particular, merely saying that the in- 

 terstices near the suture are not raised except at the apex and 

 base. In a short note following the description, however, it is 

 stated that the third interstitial line is not prominent. The fact 

 is that of the nearest four interstices to the suture none are dis- 

 tinctly raised anywhere except the third, which is quite strongly 

 cariniform in about its apical one-fifth and is evidently convex 

 close to the base, becoming cariniform on the basal declivity of 

 the elytra. 



D granulipennis, Keitt This name is evidently a synonym 

 of Z), Ericlisoni, Newm., the description of which was clearly un- 

 known to Reitter, inasmuch as he says that his species differs 

 from all those previously described in having the sulcus of the 

 pronotum continuous, — while Newman had attributed that 

 character to Erichsoni. A comparison of the descriptions is 

 quite conclusive as to their having been founded on a single 

 species. I believe this synonymy has not been previously noted. 



The following is a tabular statement of the distinctive 

 characters of the Deretaphri known to me : — 



A. The sulcus of the pronotum deep and sharply defined. 



B. Pronotum excessively finely — almost invisibly — punctulate. 

 C. Sides of prothorax rounded in front half. 



D. Nigro-piceous, subopaque ; prothorax less 



narrowed at base ... ... ... ^^icews, Germ. 



DD. Fuscous-red, nitid ; prothorax more 



narrowed at base ... .. ... Balcewelli, Pasc. 



CC. Sides of prothorax straight and subparallel in 



front half ... ... ... ... thoracicus, Blackb. 



BB. Pronotum notably more strongly (but still 

 sparsely and finely) punctulate. 

 C. Inner 4 interstices of the elytra absolutely flat 



(except third close to base and apex) ... gracilis, Blackb. 



CC. Inner 4 interstices of elytra very evidently 



not flat ... ... ... ... iridescens, Blackb. 



BBB. Pronotum strongly and closely punctulate. 

 C. The third interstice of the elytra genuinely 

 cariniform throughout (shoulders strongly 

 produced). 



