Lea — On Australian Coleopteka 277 



BYRRHINUS Mots.(2) 

 BYRRHINUS PUNCTIPENNIS Macl. (furmciiy TRINODES). 

 Transferred by .Arrow (■') to the P)yrrlii(lae from the Dennestidae. Macleay 

 described tlie elytra as "coarsely punctured in irregular rows" ; on the basal half 

 of the elytra the ])unctures are very irregular on the sutural lialf. but towards 

 the sides the rows of large punctures become almost regular; they greatly decrease 

 in size posteriorly. In addition to the type locality the species occurs at Cairns, 

 South Johnstone River, Little Mulgrave River (Queensland), Darwin (Northern 

 Territory), and Upper Ord Ri\er (North-western Australia) ; and it varies in 

 size from 2 -25 to .S -.S mm. 



BYRRHINUS NOCTIVAGUS sp. nov. 



Dark piceous-bruwn, sometimes almost black; under-surface and legs of a 

 dull red, antennae dull red. InU apical half more or less infuscated. Moderately 

 densely clothed with short, sub-depresse!, pale jnibescence, becoming denser and 

 more depressed on abdomen. 



Head with rather dense and minute punctures, becoming crowded in front. 

 ProtJiorax more than thrice as wide as long, sides strongly and evenly rounded; 

 with dense and rather small, but sharply defined punctures. FJytra almost 

 parallel-sided to beyond the middle, outlines continuous with those of prothora.x, 

 base strongly trisinuate ; with rows of fairly strong punctures in shallow striae, 

 becoming smaller ])osteriorly, interstices with dense and small punctures. Under- 

 siirfacc with dense and minute punctures. Length, 1 vS — 2 mm. 



Hah. Queensland: Cooktown, Alulgrave River ( H. Hacker), Mackay ( C. 

 French from R. E. Turner), Cairns, Rockhaiupton {A. M. Lea); Northern 

 Territory: Darwin ( N. Davies); North-western Australia; Port George the 

 Fourth (J. R. P.. Love). Type, I. 10712. 



.A. comparatively narrow oblong-elliptic species, which is frequently attracted 

 to lights. The antennae are moderately long and the apical joints are compressed 

 so that from some directions they aiijiear thinner than the [ireceding ones, and 

 from other directions wider. 



X'arietv .K. F.leven specimens, all fmtu Queensland, differ in being slightly 

 larger, upper-surface uniformly reddish, and seriate [nmctures of elytra smaller. 



BYRRHINUS PUBIVENTRIS sp. nov. 



Rlack. shining; most of under-siuTace obscurely diluted with red, legs, palpi 

 and basal half of antennae of a dull red. Upper-surface glabrous, except for 



(2) Mots., Etud., Ent., 1858, p. 50; .\rrow, Ann. Mag. Nat. Hist., iv (ser. 8), 1909, 

 p. 195. 



(3) .\rrow, Ann. Mag. Xat. Hist., xv (Ser. 8), 1915, p. 450. 



