1914] 



F. H. Gravely : An Account of the Oriental Passalidac. 261 



Regd. No. -^j^ 



Borneo Sarawak Museum. 



6398 8400 Sinkep Island Museum Collector. 



iJii' Mujang, Sarawak, Borneo C. W. Beebe. 



Specimens are preserved in the Sarawak Museum from Kuching, Matang Road, 

 Sadong and Paku. 



Description.— Length 11-14 mm. Differs from L. roepstorfi in the following 

 characters only. Mandibles with a minute denticle above at base of upper terminal 

 tooth in unworn specimens. Frontal area of head usually longer in the middle line and 

 more rounded behind. Pronotum somewhat more thickly and uniformly punctured at 

 sides. Mesosternum with inner wall of scars more or less incomplete behind ; central 

 area more often, and sometimes also more distinctly, roughened or finely punctured; 

 central area of metasterniim normally marked thus ; intermediate areas of metasternum 

 strongly punctured throughout. Hind coxae polished. Abdominal sterna uniformly 

 marked with large shallow punctures quite unHke those found in any other species of 

 the genus that is known to me. 



Genus TRICHOSTIGMUS, Kaup. 

 Trichostigmus thoreyi, Kaup. 



Described from a single specimen from Middle Luzon, in the Hamburg Museum 

 collection. 



Description.— Length 24 ram. Head and its appendages much as in the specimen 

 of Leptaulax bicolor shown on pi. xiii, fig. 58 : the middle lower tooth of both man- 

 dibles is, however, somewhat more acute ; the median tubercle of the anterior margin 

 of the head is obsolete ; the frontal area is wider behind, consequently appearing larger 

 and almost rectangular ; and on the mentum the scars are more sharply bent than is 

 usual in the genus Leptaulax. Pronotum with strongly developed median and 

 marginal grooves, former scarcely complete in front, latter markedly incomplete 

 across middle before and behind ; a few punctures devoid of hairs present in anterior 

 angles, in anterior extremities of two halves of marginal groove, and above scars ; 

 scars and rest of marginal groove thickly set with hair-bearing punctures. Lateral 

 plates of prothorax smooth in front and behind, somewhat sparsely punctured and 

 hairy between ends of coxal cavities and lateral margins. Scutellum with a few 

 distinct punctures near middle. Mesothoracic episterna punctured above and along 

 almost whole length of anterior margin. Mesosternum smooth except in scars which 

 are rugose. Lateral areas of metasternum narrow, linear, finely roughened, widely 

 separated from central area; posterior intermediate areas punctured beside inner 

 margin, smooth laterally and behind. Hind coxae and abdominal strrna almost entirely 

 smooth. Elytra with lateral grooves more strongly punctured than dorsal, punctures 

 of last four grooves somewhat confused with somewhat smaller hair-bearing punctures 

 with which the ridges between them are thickly covered. 



