2G8 Mr. G. J. Arrow on Lamellicorn Beetles 



form with anterior lateral tubercles called mastersi by 

 Macleay, which may be an extreme development of the same 

 species. 



The three following species, like D. tnermis, Blackb., are 

 hornless in tlie male. It is probable that there are many 

 related forms, which, if known, have been supposed to be 

 females only. 



DasygnatTius gJobosus^ sp. n. 



Castanens, capite prothoraeeque obscurioribus, breviter ovatus, 

 convexus, capite parvo, pronoto nitido, parcissime minute punc- 

 tato, ad latera angnste ruguloso, his omuino rotundatis, angiilis 

 posticis fere obsoletis ; elytris irregiilariter seriato-punctatis : 



(S , capite ubique grosse punctato, clypeo brevi, reflexo, antice 

 recte truncate, lateribus rectis, multo convergentibus, postice 

 angulatim carinato et ad angulum minute sad acute tuberculato ; 

 prothoracis autice medio breviter impresso, basi hand marginato ; 

 jiygidio couvexo, omnino crebre ruguloso. 



Long. 25 mm. ; lat. max. 15 mm. 



Hah. Queensland : Moreton Bay. 



Tills has a short rounded shape, quite different from that 

 of ail the other species, and in the great reduction of the 

 external male characters is comparable only with D. inermis, 

 lUackb. From that it differs entirely, not only by its 

 globose form, but in the shape of the iiead, of which the 

 clypeus is very short and the front angles very obtuse, but 

 not at all rounded. The marginal line at the front of the 

 ])ronotum is not angulated in the middle. 



In a second specimen (from Andrew Murray's collection, 

 but without precise locality), which I believe to be the 

 female o£ 1). glohosus, the htad is larger, the clypeus almost 

 semicircular and without carina or elevation of any kind, 

 the pronotum has an almost continuous posterior marginal 

 stria, but no anterior depression, and the pygidium is rather 

 flat, shining^ and very thinly punctured. 



Dasygnathus impotens, sp. n. (PI. XIIT. fig. 11.) 



Castaneus, capite pronotoque fere nigris ; nitidus, convexus, elon- 

 gatus, postice amphatus ; capite rugose punctato, clypeo mediocri, 

 lateribus convergentibus, margine antico retleso, leviter arcuato ; 

 pronoto parcissime minute punctato, ad latera auguste ruguloso, 

 his fortiter arcnatis, angulis anticis aciitis, posticis obtusissimis, 

 basi trisinuato, immarginato ; elytris dorso fortiter sulcatis, sulcis 

 vage puuctatis, spatio sublaterali inaequaliter punctato ; pygidio 

 parce punctulato, angulis anticis rugulosis, basi pares fulvo- 

 hirsuto : 



