BY EUSTACE W. FERGDSOX. 61 



white, a median vitta not extending down declivity, interrupted vittae between 

 the rows of tubercles; sides of prothorax vittate above, sides of elytra maculate 

 with white. 



Head cuucave iu front; intercristal ridge strongly raised; supraorljital crests 

 hiramate, the posterior ramus long, curving upwards and somewhat l)ackwards, 

 slender and acutely pointed at apex, tlic anterior ramus much shorter, slender 

 and pointed, the apex directed upwards and forwards arising in front of juuc- 

 tion of intercristal ridge with crest. Rostrum concave above, with a rather deep, 

 median, foveiform depression anteriorly; lateral margins raised in an obtusely 

 i-oui<-al tubercle about middle; internal lidges low, convergent; basal foveae 

 small. Antennae with scape somewhat Hattciied; funide with first joint slightly 

 smaller than second; club brietiy pedunculate. Prothorax with median area 

 lather deeply longitudinally impressed anteriorly, more lightly posteriorly; sub- 

 median tubercles in single series, erect, conical, the two anterior somewhat re- 

 curved, but not larger than the others, the two median the largest and somewhat 

 more outwardly placed; lateral tuliercles spiniform, the median large, acutely 

 pointed and somewhat recurved, the anterior and posterior hardly more than 

 spicules. Elytra elongate, suljparallel. rather strongly convex transversely, punc- 

 tures and granules obscured by clothing and tubercles; with three rows of strong 

 spiniform tubercles, first row with 7, the basal ones smaller, but stout and sub- 

 conical, the apical 2 — 3 larger and acutely spinifonu; second row with 8 strong 

 spines, larger and more acute posteriorly, extending farther down decli\-ity than 

 first row ; humeral tubercle a large strongly recurved, outwardly projecting 

 spine; third row with 3 — 1 strong spine.s. Ventral surface set with large, longi- 

 tudinally confluent punctures, the intervals strongly raised and strigifonn, more 

 reticulate on apical segment. Intermediate tibiae with a strong subapical notch; 

 posterior tibiae bisinuate, with a strong spur-like process projecting anteriorly at 

 apex, somewliat recui-\'ed and bidcntate. Dimensions : c?. 20 X 7 mm. ; ?. 21 >^ 

 9 mm. 



JIab. — Western Australia: Beverley. Ankertell. 



This species cannot well be confused with any other described species; it 

 appears to be most nearly related to .-1. spinosus Macl. and A. suiuralis Boliem. 

 hut may be readily distinguished by the firet tubercle of the submedian prothoracic 

 row not being larger than the other tubercles of the row. 



The female differs fi-om the male in being more obese, with the elytral 

 tubercles 6 — 7, ti — 7, 4 in number; the venter is convex, with obsolete punctures, 

 and the middle tibiae are not notched. 



The s)iecics presents some variation iu form and in the size of the tubercles. 

 A male from Beverley is more convex and has the tubercles distinctly reddish, 

 while the tubercle on the external rostral margin is an acute spine. Specimens 

 from Ankertell are flatter, much less convex than the Beverley specimen, tiie 

 elytral intei-stices are broader and the tubercles rather smaller. 7 — 8. 8, and 4 in 

 the three rows, the external rostral margins are ang-ulate but not definitely tuber- 

 culate. The female from Ankertell has a short tubercle on the rostral margins; 

 the elytral granules are more distinct and the tubercles rather smaller, 9, !), 4 in 

 number. The actual types which are in the Macleay Museum are intennediate 

 between the two extremes .shown l)y the Beverley and Ankertell specimens. 



In addition to these Western Australian specimens I liave before me speci- 

 mens of a foi-m from the Mallee District, Victoria, which T am unable to separate 

 specifically from ,4. humeraUs. In view of the apparent disconnected distri- 

 bution I have thought it advisable to give a varietal name to these specimens. 



