450 STUDIES IX AUSTHALIAN EXTOMOLOGV, 



at a place about twenty-five miles north-west from the town of 

 Urana. It is sluggish in its movements. 



Plat v x i x i. 

 Platynus cooki, n.sp. 



P^Uiptic-oval, depressed ; prothorax lightly transverse, widely 

 margined ; elytra much broader than prothorax, lightly striate, 

 three foveiform punctures on each elytron, the anterior on course 

 of third interstice, the two hinder ones on course of second sti'ia. 



Olive-black ; undersurface piceous, legs light brown. Head 

 smooth ; front longitudinally and widely impressed on each side, 

 the impressions extending to the clypeus : clypeal suture lightly 

 marked ; eyes very convex and prominent. Prothorax transverse 

 (1-2 X 1-6 mm.), widest a little before the middle, evidently 

 wider across base than apex ; basal part a little depressed ; sides 

 rounded ; anterior margin truncate ; base truncate above peduncle, 

 cut obliquely forward to angles on each side ; basal angles marked, 

 but obtuse ; border wide, reflexed, widest and prominent at basal 

 angles ; a wide fovea on each side of base ; median line strongl}' 

 impressed, reaching base ; marginal punctures as in F. maryim- 

 collis, Mac). Elytra ovate (4 x 2-7 mm.), base emarginate in 

 middle with shoulders roundly and widely advanced ; apical curve 

 strongly sinuate on each side ; strite simple, entire, fifth more 

 strongly impressed near apex, sixth more strongly impressed near 

 base ; striole at base of first interstice long ; interstices flat, first 

 narrow ; three strong foveiform punctures on each elytron, anterior 

 on basal third on course of third stria, intermediate about middle 

 on course of second stria, posterior about half way between the 

 intermediate one and apex on course of second stria ; ninth inter- 

 stice strongly punctate along course of eighth stria ; border 

 reflexed. Ventral segments smooth. 

 Length 6 '5, breadth 2-7 mm. 



Hab. — Queensland ; King's Plains Station, 28 miles soutli-west 

 from Cooktown. (Sent to me by Mr. N. H. Gibson.) 



