BY THOMAS G. SLOANE. 561 



thorax witli upper surface densely and finely punctulate; elytra 

 convex, simply striate, seventh stria wanting, striole at base of 

 first interstice elongate, punctulate, seventh interstice not carinate 

 near apex, humeral angles obtuse; ^ having anterior tarsi with 

 four basal joints lightly dilatate and a little squaraulose beneath. 

 Black, elytra nitid; sides of prothorax piceous near basal angles; 

 antennae fuscous, basal joint piceous. 



Head small, cylindrical behind eyes; clypeal suture distinct; 

 front not punctate behind angles of clypeus; eyes hemispherical, 

 prominent, hardly truncate behind; orbits not swollen and hardly 

 inclosing eyes posteriorly. Prothorax transverse (1'9 x 2 9 mm.), 

 widest about posterior third, greatly narrowed anteriorly; sides 

 rounded; apex lightly emarginate, angles obtuse; base truncate, 

 angles obtuse; basal impressions shallow, distinct. Elytra wide, 

 ovate (5-2 x 3'6 mm.), convex; base truncate; apex widely rounded; 

 striae strongly impressed, simple ; interstices depressed, seventh 

 and eighth confluent, ninth visible (and punctate) in marginal 

 channel near base and apex, third bipunctate. Under surface 

 shagreened ; prosternum margined between coxae. Length 8, 

 breadth 3 6 mm. 



//ab. : N.S. Wales — Mulwala, Grenfell (Sloane; two specimens 

 under a stick on the edge of a pool near Grenfell, August, 1899.) 



According to Baron Chaudoir, the genus Auatrichis is chiefly 

 distinguished by the nature of the puncturation of the upper 

 surface, and differs from Oodes by several characters: the anterior 

 margin of the ligula is lightly emarginate between the setae which 

 are very far apart; the penultimate joint of the maxillary palps 

 is shorter than the last; the apex of the maxillae is less hooked; 

 there are only three punctures on the anterior margin of the 

 labrum, the middle one is more or less broad, and bears from 

 four to two set«3; the form of dilatation is different in the anterior 

 tarsi of the male.* 



The total absence of the seventh elytral stria and the conse- 

 quently wide seventh interstice is the characteristic feature of A. 



• Vide Monograph. Ann. Soc. Ent. Fr., ISSJ (6), ii. p. :nS. 



