

( 231 ) 



*o '919 



XIIT. xYf/r species of Staphylinidae /row Singapore. Part 

 II. By Malcolm Cameron, M.B., R.N., F.E.S. 



{Coiil in ued from p. 90.) 



[Read June 5th, 1918.] 



The Groups Megarthropsini (n.), Tachyporini, Adinopsini 

 (n.), Gymnusini, Myllaenini, Pronomaeini and Diglottini are 

 enumerated in this second instalment, of my paper. The 

 types are contained in my own collection. 



Megarthropsini, n. group. 

 Megarthropsis, n. gen. 



Remarkable by the build of the head and thorax resembling to 

 a considerable extent that of the genus Megarthrus, but in the struc- 

 ture of the presternum, coxae and the sexual characters appears 

 undoubtedly to be closely related to the Tachyporini. 



Head subtriangular, produced, narrowed, and rounded in front 

 of the eyes, limited by a fine raised line ; eyes large and prominent ; 

 temples represented by a small obtuse angle. Labrum transverse, 

 broadly emarginate, setose. Mandibles rather stout, simple, sharply 

 pointed at the apex. Maxillary palpi elongate, the 1st joint small, 

 the 2nd elongate, the 3rd half the length of the 2nd, the 4th longer 

 than the 3rd, fusiform. Mentum (pars antica) transverse, corneous, 

 quadrilateral, the anterior margin narrower than the posterior. 

 Labium transverse, partly corneous, broadly emarginate anteriorly; 

 tongue broad, membranous, obtusely emarginate in front. Labial 

 palpi short, the 2nd joint shorter than the 1st and 3rd, the latter 

 truncate. Paraglossae strongly pectinate, not extending beyond the 

 tongue. Inner and outer lobes of the maxilla densely ciliated at 

 the apex, the outer lobe also ciliated along the outer border. Thorax 

 with the side-margins broadly explanate ; prosternal process short 

 and pointed ; anterior coxal cavities widely open behind, the episterna 

 not nearly meeting, the epimera wanting; mesosternum finely 

 grooved between the middle coxae which, like the rest, are approxi- 

 mate. Elytra scarcely extending beyond the metasternum, the dorsal 

 surface separated from the epipleura by a raised line, the latter com- 

 plete, and with a raised line parallel and close to the inner border. 

 Winged. Abdomen pointed, the sides narrowly bordered, the first 



TRANS. ENT. SOC. LOND. 1919. — PARTS III, IV. (.MAR.) R 



