10 NKW ZEALAND BVRRHIDAE. 



concave in trout, the basal half more deeply. Epipleurae broad, concave 

 at the base, but becoming linear behind the metasternum. Basal ventral 

 segment gradually depressed at the sides, but not concave. 



Length, 2 linos: breadth., If lines. 



Ligars Bush. Papakura. Two. found under logs. 



Synorthus orbicularis Broun. Man. N.Z. Coleopt., p. 245. 



Glabrous, shining, piceo-rufous ; antennae, palpi, and legs flavescent. 



Head distinctly punctured, more closely near the eyes than on the vertex ; 

 forehead slightly rounded, finely margined between the eyes and antennae. 

 Thorax finely yet distinctly margined in front, its sculpture rather finer 

 than on the middle of the head, much finer but closer towards the base. 

 Elytra with rather shallow irregular punctures, less distinct than those 

 near the front of the thorax. 



Eyes finely faceted. Maxillary palpi with broad terminal joints, which 

 are truncate at the apex. Antennae with the club apparently 6-articulate, 

 the 6th joint being rather broader than the preceding one, the 11th largest. 



Like S. sternalis, but distinguished therefrom by the thoracic margins 

 and uniformly yellow colour of the limbs. 



Length, If lines ; breadth, 1£ lines. 



Parua, Whangarei. Under logs ; two individuals. 



Synorthus nigricans Broun. Man. N.Z. Coleopt., p. 671. 



Nitid, nude, piceo-niger, legs dark red, tarsi fulvescent, antennae 

 castaneo-rufous. 



Head moderately coarsely punctured, distantly on the middle ; forehead 

 subtruncate in the middle, finely margined near the eyes. Thorax distinctly 

 but not closely punctate, more finely than the head, more finely towards 

 the base, with an elongate median fovea behind the middle, the apex slightly 

 margined near the angles. Elytra with unequally distributed punctures, 

 which are less definite than those near the front of the thorax, not effaced 

 near the extremity : the sutural region a little depressed behind the middle. 



Antennae gradually thickened, the club apparently 6-jointed, basal joint 

 thick, pitchy-red. 



The narrow ante-basal fovea on the thorax is a good differentiating 

 feal tire. 



Length, 2 lines; breadth. 1^ lines. 



Paina. Unique. 



Synorthus insuetus Broun. Man. X.Z. Coleopt., p. 769. 



Shining, glabrous, quite black, legs and basal joint of antennae rufous. 

 remaining joints pale rufo-castaneous, tarsi fulvescent. 



Head rather strongly rounded in front, and, though without margins, 

 rather well defined there; it is finely yet distinctly punctured but nearly 

 smooth along the middle. Thorax very finely, rather distantly and in- 

 distinctly punctate, the apex finely margined near the angles. Elytra 

 very finely and ^definitely sculptured. 



Eyes only moderately prominent, strongly transverse, with obsolete 

 facets. Antennae with the 6th joint rather broader than its predecessor, 

 -o that the club is indistinctly 6-articulate, joints 8-10 are strongly trans- 

 verse. 



