372 Records of the S.A. Museum 



one taken by Mr. Davey, but two males have the horns greatly redneed in size, still 

 nearer vertical, and with the tooth on each smaller, although quite distinct; the 

 median elevation is reduced to appear as two almost equilaterally triangular 

 processes joined at the base, rather than a single bifid elevation. 



ONTHOPHAGUS MAMILLATUS sp. nov. 



Plate ix, fig. 71. ^ • 



S Black, subopaque; antennae, palpi, and tarsi dull reddish, club paler. 

 Under-surface and legs with more or less rusty-red hair. 



Head rather large, sides behind clypeal suture slightly dilated and then 

 strongly narrowed ; interocular ridge narrow and with three small prominences, 

 of which the median one is the largest ; between the ridge and the clypeal suture 

 polished and Avith smaller punctures than elsewhere. Clypeus with sides strongly 

 narrowed and slightl}^ incurved from base to apex, which is gently rounded and 

 strongly upcurved ; hind suture carinated, the median portion straight and Avider 

 than the combined Avidth of the sides ; Avith fairly dense and sharply defined punc- 

 tures at apex and sides separated by A^ermiculate ridges. Eyes rather narroAv, 

 facets fairly distinct. Prothorax rather large, front portion retuse ; Avith tAA'o fairly 

 acute processes rather close together at apical third, a shalloAv median line from 

 betAveen them to base ; sides strongly dilated, front angles obtusely pointed, hind 

 ones A'ery wide; margins and marginal gutter distinct throughout, but enfeebled 

 about hind angles ; punctures rather sharply defined only about lateral foveae, 

 Avhere they are of moderate size, elscAA'here although not minute thej' are A'ery 

 ill-defined, and completely A'anish in some parts. Elytra shagreened, Avith small 

 and indistinct punctures ; striae A^ery narroAV, shining, and Avith distant punctures. 

 Pygidium shagreened, and Avith rather feebly defined punctures. Metasternum 

 Avith dense, asperate punctures on sides, becoming sparser and more sharply 

 defined about middle. Apical segment of abdomen strongly narroAved to middle. 

 Length, 10-13 mm. 



9 Differs in having the head smaller, Avith the sides narroAved from nearer 

 the base, clypeus Avith A'ermiculate ridges throughout (except on the elcA'ated 

 margins), prothoracic tubercles smaller, apical segment of abdomen A'ery slighth- 

 narroAved in middle, and front tibiae slightly shorter, Avith Avider teeth. 



Hah. Queensland: Mount Tambourine (H. Hacker, H. Pottinger, and 

 A.M. Lea). Type, I. 3750. 



The prothoracic processes of the tAA^o males appear rather acute from above, 

 but from the sides they are seen to be flattened, Avith the front edge almost A-ertical ; 

 Avhen seen from behind each appears to overhang a space halfway betAveen the 

 median elevation of the interocular ridge, and one of the side ones. Of scA'en 



