69 



{10 X 7 mm.) broader, with the granules rather more pro- 

 minent, the second interstice with a single spine on each side, 

 situated above the apical spine of the first row ; first row of 

 tubercles much degraded, only the apical tubercle really spini- 

 form, though the preceding two are larger than the others and 

 subspiniform ; the second row similarly degraded, about 

 thirteen in number, the last four larger and becoming spini- 

 form ; the third row with humeral and second tubercle large, 

 the others much smaller than in the male, and rather more 

 numerous. Dim. — Male, 14x5 mm.; female, 15'5 x 7 mm. 



Hah. — Central Australia: Tennant Creek. Type male in 

 South Australian Museum ; type female in National Museum, 

 Melbourne. 



Close to .4. simplex, Pasc, but separated, inter alia, by 

 the difference in the supra-ocular crests. .4. tatei, Blackb., is 

 probably closely allied, but the postero-lateral spine in that 

 species is described as bifid. 



ACANTHOLOPHUS HALMATURINUS, U. Sp. 



(S . Close to .4. adelaidae, Waterh., but larger and 

 broader. Black; sparsely clothed with minute brownish 

 adpressed subpubescence, hardly squamosity ; the posterior 

 femora with a pale subapical ring. 



Rostrum much as in .4. adelaidae ; the external margins 

 raised into a strong tubercle or spine, larger than in .4. 

 adelaidae, the margins sloping backwards from this spine to 

 the base of the supra-ocular crests, low at the base, but closing 

 in the outer side of the basal foveae ; the supra-ocular crests 

 bifid, the anterior branch much stronger than in .4. adelaidae, 

 projecting forwards and somewhat upwards, the posterior 

 branch more slender (both branches, however, comparatively 

 stout), the notch between deep and moderately wide; inter- 

 cristal ridge slightly lower than in .4. adelaidae. Frothorar 

 (4 X 4'5 mm.) rather wider than in A. adelaidae, the dorsal 

 surface rather closely set, all over, with small, but evident, 

 granules ; the median tubercles arranged much as in .4 . 

 adelaidae, the anterior pair cristiform but less prominent, the 

 median ones smaller and less definite than in A. adelaidae 

 hardly larger than granules, the subbasal pair large, back- 

 hardly projecting, the basal tubercles moderately large ; lateral 

 tubercles triangular, more obtuse than in A. adelaidae, granu- 

 late on the upper S'urface, the anterior pair conjoined, the first 

 being very small, the posterior tubercle single but with a 

 small tubercle at base, posteriorly. Elytra (9x6 mm.) sub- 

 parallel, gently rounded to base, and before apex; with rows 

 of small granules, larger and more conspicuous than in A. 

 <idelaidae; with three rows of tubercles; first row granulate 



