BY THOMAS G. SLOANE. 443 



The other genera known to me, as belonging to the tribe 

 Migadopini, are Monolohus (Chile), Migadops ( = Brachyccelus : 

 Tierra del Fuego and Falkland Islands), Lissopterus (Falkland 

 Islands), Loxomerus{ = Heterodactylus: Auckland Islands), Rhyti- 

 dognathus (Monte Video). Of these, only Rhytidognathus is 

 known to me in nature; R. ovalis Dej., has the mandibles with a 

 seta in the outer scrobe; and the elytra show the remarkable, 

 elongate, false, second stria, as in the Australian genera. Water- 

 house's figures of Migadops virescens and M. ovalis do not show 

 whether this false stria is present in Migadops or not. 



Decogmus chalybeus, n.sp. 



^. Facies of Nehria (e.g., N. kratteri Dej., and N. hemprichi 

 Klug). Upper surface chalybeous, sometimes purple towards 

 sides of elytra; undersurface black; mandibles, palpi, and tarsi 

 piceous-red. 



Head wide between eyes (2*5 mm. across eyes), smooth: front 

 with a wide, shallow impression on each side. Pro thorax broader 

 than long (2*7 x 3-5 mm.), widest a little before middle, sub- 

 depressed, widely margined, wider at base (2-8 mm) than apex 

 (2*3 mm.); apex emarginate; anterior angles obtuse, subpro- 

 minent; base lightly arcuate in middle, truncate on each side; 

 basal angles rectangular, with summit rather obtuse; lateral 

 basal impressions deep, wide, connected by a transverse impres- 

 sion; median line well marked; lateral border wide, reflexed, 

 explanate towards base. Elytra much wider than prothorax 

 (9'7 X 5*1 mm.), hardly wider across base than base of prothorax, 

 roundly explanate on each side behind basal angles (these not 

 marked), subdepressed, deeply striate ; striae simple, second 

 (counting at base) obsolete on apical declivity; interstices convex, 

 ninth (counting at apex) convex, feebly seriate-punctate. Mes- 

 episterna punctate. Apical ventral segment unisetose on each 

 side of apex. Length, 13-14; breadth, 4-8-5-1 mm. Type in 

 Coll. Sloane. 



Hab. — N. S. Wales: Comboyne. I found two specimens 

 under the bark of a decaying tree fallen in the thick brush, by 

 the side of the road on the Bulli Mountain (north-western slope), 

 near the village of Comboyne, in July, 1914. 



