BY THOMAS G. SLOANE. 405 



rather wide impression on each side of base ; spaces between these 

 impressions and Ijasal angles gently acclivous, not elevated or 

 carinulate ; space across peduncle Ijetween the impressions 

 depressed and defined by a distinct transverse line ; median line 

 distinctly marked. Elytra sub-oval (2-8 x 1-6 mm.), truncate at 

 base, widely rounded at apex, lightly convex ; sides sub-parallel, 

 very lightly rounded ; stripe simple, strongly impressed, fifth join- 

 ing marginal channel at humeral angle ; striole at base of first 

 interstice strongly impressed ; interstices convex ; anterior punc- 

 ture of third interstice a little before the middle, posterior just 

 before the apical declivity ; marginal channel wide, with four 

 punctures on anterior third ; lateral border strongly reflexed. 



Length 4-5-5, breadth 1-4-1 -6 mm. 



Hah. — Port Jackson. 



This seems a thoroughly isolated species among the Australian 

 Bembiides ; I know of none resembling it. The decussating- 

 mandibles, the head flattened and wide across the clypeus and 

 between the e3'es, and the prothorax with prominent advanced 

 anterior angles are quite different from any other Australian 

 Bembiide I have seen ; and my want of knowledge of foreign 

 species prevents me from suggesting any extra- Australian affini- 

 ties. 



I dedicate it to the veteran Australian naturalist, — Mr. George 

 Masters, Curator of the Macleay Museum, from whom I have 

 received specimens ; and who informs me it is found near the 

 water's edge in the bays and inlets of Port Jackson, but that he 

 has never taken it on an}?- beach exposed to the ocean. 



Bembidium riverix.e, n. sp. 



Robust, elongate-oval ; prothorax cordate, sides sinuate behind ; 

 elytra convex, strongly punctate-striate ; upper surface of head 

 and prothorax and the interstices of the el3^tra shagreened. 



^. Bronzy or Ijrassy green, shining ; apex of elytra and legs 

 pallid, apex of femora, base and apex of tilii^e, and tarsi fuscous ; 

 antennte fuscous, basal joint pallid ; under-surface black or 



