281 



horn on each side near the excavation, middle with a stout 

 semi-double projection slightly overhanging the excavation; 

 sublateral foveae rather large, sides with punctures as on 

 front of head. Scutelhim impunctate. Elytra with small 

 punctures in striae, of these the thirteenth and fourteenth 

 not conjoined towards the base. Front tibiae with five teeth, 

 hind pair with two or three small and two wide carinae. 

 Length, 22 mm. 



9 . Head with a subcorneal elevation crowned with two 

 small tubercles between eyes, frontal margin elevated into a 

 subcorneal tubercle above each antenna ; lateral areae with 

 the front carinae curved round so as to become conjoined to 

 the supra-antennal tubercles, instead of touching the front 

 angles of the clypeus. Prothorax obliquely flattened in 

 middle of apex, the slope crowned by a transverse bisinuate 

 ridge, whose ends are directed towards the front angles; with 

 two small, deep, but somewhat transverse, marginal foveae 

 in front ; with dense and coarse punctures connecting the 

 sublateral foveae. 



Flab.— Western Australia; Walkaway. Type, 1914; 863 

 in the Western Australian Museum. 



The foveae on the front margin of the prothorax of the 

 male are not deep and circular as on other members of 

 Group 1, but they appear as deeper parts of the large exca- 

 vation ; on the female, however, they are deep and isolated, 

 and as the hind tibiae have two or three small carinae, in 

 addition to the two wide ones, there need be no hesitation 

 in referring the species to Blackburn's Group 1 . I think 

 the prothorax should be regarded as having onlv three horns, 

 as the median one, although feebly double at its apex, is 

 supported on a single base, very different to the two con- 

 spicuous median horns of tena.se, armigerum, and quinque- 

 corne. This character alone will readily distinguish it from 

 all the other males of its group. The female in general 

 appearance is close to many others, but in Blackburn's table 

 would be associated with cornigerum, (2) from which it differs 

 in the median semi-double elevation of head free from any 

 carinae. On the male the cephalic horn is about as long as 

 the head is wide across the canthi ; on the female the lateral 

 areae of the clypeus, although completely enclosed by carinae, 

 have but two of these, instead of three. 



(2) In that table cqrmgerum was separated from hippopus by 

 punctures of the interstices, but evidently the word interstices was 

 accidentally used for striae ; all the specimen's in the Museum are 

 without punctures on the interstices, hut are punctate-striate, 

 whereas on hippopus they are striate onlv.. 



