Classification of the Coleopterous family Di/nastidx. 343 



Indeed the respective descriptions indicate no difference 

 and a suspicious similarity of terms is only partly avoided 

 by a different arrangement of phrases. Although the 

 type cannot be certainly identified, S. AdelaidcV, Hope, 

 appears to be also the same species. The form of the 

 front tarsus of the male appears to be the only means of 

 distinguishing Asemantus from Semano^derus, for the first 

 hind tarsal joint, also mentioned by Mr. Blackburn, is of 

 quite typical form. Except for very strong reasons it is 

 certainly objectionable to found genera upon characters 

 only present in one sex and I am not able to recognise 

 this genus. 



Another Australian Dynastid, the Scarahxus harlarossa, 

 Fabricius, has never been assigned its proper systematic 

 position, but has been catalogued provisionally under the 

 name of On/dcs, like other unplaced species, although it 

 is quite unlike the members of that genus. It has most 

 affinity with the true Scapanes, with which it agrees in 

 the absence of propygidial stridulating apparatus, in the 

 long slender tarsi and very spinose middle and hind 

 tibise. Although it would not do violence to any essential 

 character of that genus to include it, its very different 

 outward form, the almost complete absence of sexual 

 dimorphism, together with differences in the structure of 

 the legs, maxillae, etc., render it necessary to form for it a 

 genus, which may be defined as follows : — ■ 



Haploscapanes, n. gen. 



Form rather broadly oval, with recurved lateral mai'gins to the 

 pronotum and elytra. Clypeus tapering, bicuspidate at the ai>ex. 

 Mandibles nearly straight at the sides and blunt and prominent at 

 the tips. Maxilla) slender, blunt at the end and without teeth. 

 Labium rather long, regularly narrowing to the points of insertion 

 of the palpi and slightly widening beyond. All the palpi long and 

 slender. Front femora scarcely toothed at the front margin. Front 

 tibifc armed with three very acute teeth; middle and hind tibise 

 produced apically into very long acute spines. All the tarsi long 

 and slender. 



^ . Head armed with a short, but slender and acute, horn. 



9 . Head armed with a conical tubercle. 



There appears to be only a single species, Avhich is 

 common in the Northern territories of South Australia 

 and Queensland. The original Fabrician sj^Gcimens, now 



