BY ARTHUR M. LEA. 221 



portion not much narrower than the apical portion, and the 

 longitudinal elevations much less distinct; the elytra are less 

 inflated posteriorly, and the interstices are much less acutely 

 raised. 



Lathridius denticollis, n.sp. 



Moderately short and convex. Dark piceous-brown, appendages 

 paler. 



Head densely punctate, with a distinct median line, on each 

 side of which is a very feeble ridge. Antenna? rather short. 

 Prothorax noticeably wider than head, densely punctate; sides 

 suddenly constricted near base, the basal portion depressed, 

 considerably narrower than the apical, and continuously decreasing 

 in width to base, each side at the exact middle with a small but 

 distinct tooth; apical half with a feeble longitudinal impression; 

 without raised lines. Elytra elliptic-ovate, rather strongly convex, 

 with a feeble transverse subbasal impression; with series of large 

 punctures becoming smaller along the middle, 5th and 7th 

 interstices scarcely visibly raised above the others. Length 

 1| mm. 



Hob. — Huon River, Tasm. 



Lathridius serratus, n.sp. 



Moderately long and subdepressed. Dark piceous-brown, 

 margins and appendages paler. 



Head densely punctate, with a distinct median line. Antennae 

 extending backwards almost to elytra. Prothorax considerably 

 wider than head, sides rather strongly diminishing in width from 

 near apex to base, but nowhere suddenly constricted; margins 

 flattened and very finely serrated; without raised lines but with 

 a distinct median impression, and which is interrupted at about 

 its middle. Elytra ovate, shoulders rounded; alternate inter- 

 stices feebly raised; punctures large, becoming smaller along 

 middle of disc. Length 2 mm. 



JELab. — Hobart and Launceston, Tasm.; Somerville, Vic. 



From Forest Reefs (iS.S.W.) 1 have about fifty specimens that 

 I cannot structurally separate from this species, but which differ 



