New Species of Staphylinidae from Singapore. 395 



abdomen always more sparingly 



punctured behind. 13. 



13. 3rd joint of the antennae distinctly 



shorter than the 2nd ; species smaller 



(1-1-2 mm.) Sub-gen. Datomicra Rey. 14. 



— 3rd joint of the antennae not shorter than 



the 2nd; species larger (1-8-2-5 mm.). 



Sub-gen. Dimetrota Rey. 15. 



14. Antennae entirely dark; thorax closely 



and asperately punctmed; species 



uniformly dark . . . . (125) ontliophila Cam. 



— Antennae with the first two joints tes- 



taceous; thorax finely and not asper- 

 ately punctiu'ed; thorax, base of the 

 elytra, base and apex of the abdomen 

 more or less pitchy-red . . . [VIG) tuijcetophila Cam. 



15. 7th joint of the antennae longer than 



broad ..... (124:) mijcetophcuja Cam. 



— 7th joint of the antennae distinctly 



transverse. 16. 



16. Abdomen in great part reddish-tes- 



taceous; thorax pitchy-red . . (122) car pophila Cam. 



— Abdomen and thorax black . . . (123) xylophila Cam. 



17. Abdomen thickly punctured and pu- 



bescent throughout (Sub-gen. Colpo- 

 dota Rey). Pitchy, greasy-lustrous, 

 elytra testaceous, infuscate at scutel- 

 lum ; penultimate joints of antennae as 

 long as broad . . . . . (127) mparia Cam. 



— Abdomen much less thickly punctured 



and pubescent, especially behind 



(Sub-gen. Acrotona Rey). 18. 



18. Head black; abdomen reddish-testaceous, 



intermediate and posterior tibiae each 



with two distinct setae . . . (128) rufiventris Cam. 



— Head testaceous ; 6th abdominal segment 



blackish; intermediate and posterior 



tibiae without distinct setae . . ammliventris Kr. 



Exatheta Cam. 

 1. Puncturation of the thorax very fine, 

 not asperate; ground sculpture 

 wanting ... ... (129) cingulafa Cam. 



