New Species of Staphjlinidae from Singapore. 359 



the apex; 2nd joint as long as, but 

 much nairower than the 1st. Facies 

 of Acrotona Pelekoglossa Cam. 



— Tongue long or moderately long, not 



halberd-shaped. 19. 



19. Labial palpi with the 2nd joint as long as 



the ] st, styliform . . . . Neosilusa Cam. 



— Labial palpi with the 2nd joint much 



shorter than the 1st, not styliform . Gyrophaena Mannh. 



20. Labial palpi distinctly 2-jointed, the 1st 



joint without constriction at the inner 

 border; tongue small and triangular, 

 split at the apex; inner lobe of the 

 maxilla truncate and finely pectinate 

 at apex ; temples not bordered below; 

 Facies of Oligota .... Pseudoligota Cam. 



— Labial palpi obscurely 3-jointed, the 1st 



joint having a constriction at the 

 inner margin from wliich a more or 

 less apparent oblique suture passes 

 forwards and outwards; tongue 

 elongate and bifid; inner lobe of 

 maxilla pointed and narrow, the inner 

 margin strongly pectinate; temples 

 bordered below. 21. 



21. Last joint of the labial palpi as long as 



the 1st (true) joint; outer lobe of 

 maxilla simply ciliate at apex. Facies 

 of Neosilusa Ousilusa Cam. 



— Last joint of the labial palpi shorter than 



the 1st (true) joint; outer lobe of 



maxilla ciliate plumose at apex. 22. 



22. Elytra distinctly .sinuated at the postero- 



external angle; middle and posterior 

 tibiae without long setae. Facies 

 somewhat resembling Gyrophaena . Pseudophaena Cam. 



— Elytra not sinuated at the postero- 



external angle; middle and posterior 

 tibiae with a long seta. Facies 

 somewhat resembling Homalota . Caenonica Ivi'. 



MYRMEDONIINr. 



1. Tarsal formula 4, 5, 5. 

 — Tarsal formula 4, 4, 4, or 3, 4, 4. 



