COLEOPTERA 535 



elytra, the rather narrow form, and the straight anterior endings of the sutural striae. 

 Five specimens. One, which is piceous-brown instead of black, is possibly immature. 



Hab. Oahu. Mokuleiia ; Waianae mts., from fungus; Kaala mts., 1500 ft., from 

 decaying trees ; (Perkins). 



Fam. SILPHIDAE'. 



Clambus, Fischer. 

 Claiubiis Fischer, Ent. Russ. i. 1820, Gen. p. 52. 



( I ) Clanibiis, sp. ? 



A single specimen appears, after close comparison with British members of the 

 genus, to be referable to Claiubus. It does not agree specifically with the British forms. 

 The head bears some extremely fine punctures and very scanty pubescence. The 

 prothora.x and elytra are quite glabrous, smooth, and shining, and strongly convex. 

 There is some very scanty pubescence beneath. The elytra are piceous ; the head also 

 dark, lighter near the front margin ; the prothorax and legs are testaceous ; more or 

 less infuscated ; the antennae similar, except for the two-jointed club, which is darker. 

 Length with head and prothorax extended about 1 1 mm. 



Hab. Found at Kilauea, Hawaii, ix. 1896 (no. 685, Perkins). ? Introduced. 



Fam. TRICHOPTERYGIDAE'. 



In this family, the material which we have received is very small, and in some 

 cases insufficient for satisfactory examination. When more exhaustively collected, the 

 species may prove to be numerous. 



AcTiDiUM, Matthews. 

 Actidiuni Matthews, Ent. Mo. Mag. v. 1868, p. 12; Trichopterygia (London), 

 1S72, p. 86 and pi. vii. 



(i) Actidiuiu sharpiamini, Matthews. 



Actidmm sharpiarmm Matthews, Cist. Ent. in. 1882, p. 39 and pi. 11. fig. 2 ; 

 Trichop. Supplement, 1900, p. 94: Sharp, Tr. Dublin Soc. in. 1885, p. 225. 

 We have not received this species from Mr Perkins. 



Hab. Oahu. Under bark in mountain forests (Blackburn). 



Ptiliodes, Matthews. 

 Ptiliodcs Matthews, Cist. Ent. iii. 1S82, p. 40; Trichop. Supplement, 1900, p. 75 

 and pi. XIII. B. 



^ By Hugh Scott. 

 F. H. III. 69 



