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STUDIES IN AUSTRALIAN ENTOMOLOGY. 

 No. VIII.— DESCRIPTIONS OF TWO NEW TIGER BEETLES. 



By Thomas G. Sloanb. 



Megacephala spenceri, n.sp. 



Robust, ova], cylindrical. Elytra with a submargiiial row of 

 widely placed punctures on each elytron. Upper surface metallic; 

 elytra violaceous, inflexed margin piceous-black; prothorax black 

 in middle of upper surface (some green intermingled with the 

 black on the disc), sides purple shading to green on sides of disc; 

 head green, becoming black on middle of occiput and vertex ; 

 labrum piceous-brown ; mandiljles testaceous, inner margin and 

 apex piceous; gulfe purple; mentum piceous; prosternum bluish; 

 episterna greenish ; sides of body greenish, tending to blue on 

 mesosternal episterna; mesosternum, metasternum and posterior 

 trochanters piceous ; ventral segments black in middle, three 

 basal segments green laterally, fourth with a slight greenish tinge 

 towards sides, fifth black, apical segment black at base and 

 testaceous at apex ; legs, palpi and antennae pale testaceous ; 

 trochanters light brown. 



Head large, wider across eyes than prothorax, wide between 

 eyes, lightly longitudinally wrinkled near eyes ; clypeal suture 

 distinct; eyes large, prominent, hemispherical. Prothorax convex, 

 a little broader than long (5 x 5*5 mm.), widest about middle, a 

 little narrowed to base; anterior margin lightly sinuate on each 

 side ; sides lightly rounded ; base sinuate (the middle roundly 

 produced backwards), bordered on each side at basal angles, these 

 rounded; median line well marked between anterior and posterior 

 transverse impressions; anterior transverse impressions sinuate, 

 very strongly impressed on each side, strongly marked and arcuate 

 in middle; posterior transverse impression very strongly impressed. 



