80 LORD HOWE ISLAND. 



*DlAPHOBOMEBUS IB1DIPENNIS, Cliaud. 



Diaphoromerus iridipennis, Chaudoir, Bull. Mosc., 1843, p. 405. 



This species is common in Queensland, and also occurs in Norfolk Island. 



*Lestignathus fttgax, sp. nov. 



Elongate-ovate, dark piceous, shining, sometimes with a bluish tinge ; 

 elytra strongly striate, the interstices rather narrow, plain ; antennae (except 

 the basal joint) and palpi reddish testaceous ; legs rufo-piceous. 



Head narrow ; eyes rather prominent. Antennae more than two-thirds 

 the length of the body, the basal joint piceous. Prothorax narrowed 

 behind, with a distinct median line ; the sides rounded in front ; posterior 

 angles rounded. Elytra oblong-ovate, very slightly contracted before the 

 middle, strongly and regularly striate, the interstices narrow and smooth, 

 the second stria, on each side, with an obscure puncture before the middle ; 

 sides slightly sinuate before the apex. Legs rather long. Length 13 mm. 



Differs from the Tasmanian Lestignathus cursor, Er., to which it is very 

 nearly allied, by its more strongly and closely striated elytra, and by having 

 the prothorax rather less narrowed behind. The head is a little smaller, and 

 the interstices, besides being narrower, have a tendency to approach one 

 another both in front and behind. 



*Dtscolt:s hilaeis, sp. nov. 



Elongate-ovate, piceous, shining ; head rather broad, moderately convex ; 

 prothorax transverse, the margins broad ; elytra rather strongly striate, the 

 interstices broad and smooth ; antennae reddish testaceous ; legs pitchy red. 



Eyes moderately prominent. Antennae about half as long as the body. 

 Prothorax considerably narrowed behind, with a distinct median line, and a 

 large f oveolate impression on each side at the base ; sides rounded for nearly 

 half their length, then narrowed to the base ; the posterior angles rounded. 

 Elytra oblong-ovate, strongly and regularly striate, the third stria, with an 

 obscure puncture near the base ; the second stria with two obscure punctures, 

 one near the middle, the other towards the apex; sides rounded, slightly 

 sinuate before the extremity. Length 10-11 mm. 



Summit of Mount Ledgbird (2,500 feet), and throughout the island; 

 appears to be a common species. 



Allied to Dyscolus dilatatus, Er., but with the head more convex, and the 

 prothorax broader and more strongly margined, &c. The basal joint of the 

 antennae is also proportionately longer. 



DYTISCID.E. 



9 Cybisteb tbipunctatus, Oliv. 



Dytiscus tripunctatus, Olivier, Ent. 1795, III, p. 14, pi. 3, fig. 24 ; Sharp, 



Trans. Eoyal Dubl. Soc, (2) II, p. 727 (1882) — Cybister gayndaliensis, 



Macleay, Trans. Ent. Soc, N.S.W., 1871, II, p. 127. 



A single specimen of this species, which is found in Australia, and almost 



universally throughout the tropical and sub-tropical regions of the old world, 



was recently obtained in Lord Howe Island by Mr. Langley. 



HYDKOPHILID^. 



*Stebnolophus nitidultjs, Mad. 

 Sternolophus nitidulus, Macleay, Trans. Ent. Soc. N.S.W., 1871, II., p. 129. 

 I have seen specimens from fresh-water pools near Mount Grower, which 

 agree in every respect with the type of this Queensland species. 



