Lea — Australian Dung I^eetles 365 



synonymous, -with laminatus (certainly not the most abundant form) having 

 priority. There are also many other forms before me that differ slightly" from the 

 various forms known to Blackburn, but it does not appear desirable to name 

 them, even as varieties. 



ONTHOPHAGUS FURCATICEPS Masters. 



0. furcatus MaeL, n. pr. 



0. froggattl Mad. 



0. lohicoUis MaeL, var. 



Plate ix, figs. 61-63. 



The types of (). furcaticeps and of 0. froggatU differ slightly in colour, but 

 on i)lacing them side by side a few years ago I could find no structural differences. 

 The female differs from the male in having the clypeus coarsely sculptured, the 

 inter-ocular carina elevated into a short wide triangle on each side, the prothorax 

 with a bilobed protuberance in front (very variable in size), on each, side of 

 which is a deep cavity, and the front tibiae shorter and stouter; the prothorax 

 has a glqss varying from greenish to purplish. 



A specimen that Avas compared with the type of 0. lohicolUs and agreed well 

 with it has the apical segment of the abdomen not at all narrowed in its middle, 

 so is evidently a female (^) ; the remarkable development of the prothoracic pro- 

 cess appears to be an exaggeration of that of the female of 0. furcaticeps, of 

 which it should be regarded as a variety. 



ONTHOPHAGUS WALTERI Macl. 



Plate ix, figs. 64, 65. 



On the female of this species the interocular ridge is gently convex through- 

 out, on the male it is elevated on each side near the eye and vanishes in the middle ; 

 the prothoracic processes vary in size on the male, and on the female have a 

 Avorn-down appearance. On the male the two apical segments of abdomen are 

 strongly narrowed to the middle, the apical one almost vanishing there. 



ONTHOPHAGUS FISSIGEPS Macl. 



Plate vii, figs. 21, 22. 



Six specimens from Wyndham (three of each sex) evidently belong to this 

 species, but they are all smaller (10-12 mm.) than the type (6 lines). The facets 

 of the eyes are distinct, and in Blackburn's table the species would be referred to 



(9) Arrow. Ann. nnd Mag. Nat. Hist., Oct.^ 1920, p. 43.5. 



