194 ON THE SCARITID.E OF NEW HOLLAND, 



forward of the apical punctures are further from the apex than 

 in the other species. The fore tibiae are rather bluntly tridentate. 



We have now eight Australian species of Scarites, and there 

 is such a remarkable similarity in their general appearance, with 

 such an utter absence of satisfactory specific characters, that it is 

 no easy task to give descriptions which will render the species 

 easily recognizable. The student will, however, be materially 

 assisted by bearing in mind one or two points — .In the first 

 place, the eight species may be divided into those of subcylindric 

 form, or those which are comparatively narrow and convex, and 

 those which have a somewhat flattened aspect. 



The first of these sections will comprise G. cacus, approxima- 

 tus, WaterJiousei, and siohporcatulus. 



The second will consist of 8. Geryon, Damastes, Jachsoniensis, 

 and planiuscul'us. 



In endeavouring to carry this analysis further, it will be well 

 to bear in mind the peculiar sculpture of the head, which, up to a 

 certain point, is the same in all the species. Thus we find in 

 8. Cacus that there is an utter absence of wrinkles or corrugations 

 about the anterior pai't of the head, while in 8. approximatus the 

 corrugations are very marked. Again, 8. Waterhousei differs 

 from both, in having the facial grooves broad, deep, and but 

 slightly coxTugated. 8. suhporcahilus, the remaining species of 

 the first section, is in other ways so distinct, that it is unnecessary 

 here to point out its facial peculiarities. 



In the second section the same variation in this particular 

 exists in the different species. 8. Geryon has the whole 

 anterior part of the face corrugated. 6'. Damastes has the same 

 in a much less degree. 8. Jachsoniensis is marked by a trans- 

 verse impression between the facial canals, while 8. planiusculus 

 has the head broad, flat, and only corrugated in the slightest 

 degree. 



I merely point out these as the shortest and readiest modes of 

 identification. Of course, where the species are good, a close 

 investigation may detect many points of difference. 



I have only one GnaMoxys to describe, a species from the 

 Murrumbidgee, in the late Mr. MacLeay's collection. I also find 

 in that collection a species from Swan River, which, though some- 

 what smaller, I believe to be the G. ohscurus of Reiche. 



