474 ON CARABID.S FROM WEST AUSTRALIA, 



obtuse; elytra lightly convex, declivous to base, crenulate-striate, 

 interstices depressed, third, fifth and ninth seriate-punctate. 

 Nitid, ferruginous-brown; elytra infuscate towards sides and apex; 

 under surface reddish becoming darker towards sides and apex 

 of abdomen; femora testaceous (not pale); tibise, tarsi and antennae 

 clear reddish-brown. 



Head Isevigate, convex between eyes, strongly constricted 

 and transversely impressed behind eyes; front biimpressed, the 

 impressions wide, parallel; eyes convex, prominent, truncate at 

 base; postocular processes two-thirds length of eyes, obliquely 

 narrowed to neck. Prothorax lightly transverse (1"9 x 2-25 mm.), 

 convex, widest before middle ; sides rounded ; anterior angles 

 widely rounded; lateral margins explanate, narrower and very 

 lightly advanced at anterior angles^ gently roundly-obliquely 

 terminated at base behind posterior marginal setigerous puncture; 

 apex and base finely bordered; median line well marked; a wide 

 shallow impression near each basal angle; basal part of prothorax 

 feebly depressed between these impressions. Elytra ovate 

 (6 X 3-8 mm.), convex; basal border extending laterally to width 

 of base of prothorax, arcuate posteriorly, meeting lateral border 

 in a lightly marked angle; apical curve decidedly sinuate on each 

 side at extremity of ninth interstice; eighth interstice wide on 

 sides, narrow and carinate near apex; lateral margin explanate 

 (not wide). 



Length 9-10, breadth 3-5-3-9 mm. 



I/ab. — Mount Barker (Lea and Helms); Rottnest Island (Lea), 



Allied to A. brunnicolor, 81., the differences between them 

 being noted under that species; both these species may be dis- 

 tinguished from A. discoidalis, Blkb. , and A. inornatus, Blkb., 

 by the posterior angles of the prothorax being obtuse and not 

 rectangular. 



Note. — The specimens from Rottnest Island differ slightly from 

 those from Mount Barker (typical form) by their slightly smaller 

 and lighter form, and by having the prothorax, the discoidal part 

 (near the base) and the margins of the elytra of a paler colour; 

 otherwise they seem to offer no noticeable differences; it may be 

 a variety. 



