BY THOMAS G. SLOANB. 535 



This will probably come to be recognised as a distinct species, 

 but, my knowledge of P. rajilahris being confined to two speci- 

 mens, I prefer to place the Cairns species as a variety till more 

 knowledge is gained of the amount of variation occurring in these 

 nearly allied forms. The third interstice of the elytra has a fine 

 puncture about the middle of its length, but I can find no trace 

 of a puncture in front of this; in P. rufilahris there is a more 

 strongly impressed puncture at half the length, and another still 

 more distinct on the outside of the third stria about halfway 

 between this median puncture and the base of the elytra. 



N^ote. — P. australica, SI. By an error P. australica appears in 

 my tabulation of the Australian species of Perigona* under the 

 name of P. apicalis, a name which should be treated as non- 

 existent. 



Tribe MASOEEINI. 



Bates, Biologia Centrali-Americana, Col. i. p. 174 



Masoreus australis, n.sp. 



Oval, subconveXj Icevigate; bead with two supraorbital set^e on 

 each side. Black; elytra sericeous-maculate; legs piceous; palpi 

 and two basal joints of antenna ferruginous, rest of antennoe 

 infuscate. 



Head wide, short, smooth. Prothorax widely transverse 

 (I'-t X 2'3mm.), lightly convex; apex emarginate; anterior angles 

 obtuse, distant from head; sides rounded; base wider than apex, 

 obliquely truncate on each side, feebly lobate in middle, basal 

 angles obtuse but marked; lateral basal impressions obsolete; 

 median line finely impressed; two marginal setigerous punctures 

 on each side — anterior a little before middle, posterior at basal 

 angle. Elytra wide, oval (3-8 x 2-8 mm.), lightl}^ convex, de- 

 pressed near suture, lightly striate; humeral angles widely rounded; 

 sides lightly roundecl ; apical curve widely rounded without 

 lateral sinuosities; stride fine, simple, three inner more strongly 

 impressed than others, first outturned to join second at base, 



* These Proceedings, 1S93, p. 635. 



