446 Dr. Leach on the Pselaphidce, 



Pselaphus nanus^ Reichenbach, MoaographiaPselaphorum, 69, 

 and two other species in my collection of insects now in the 

 British Museum, are the only species that I know certainly to 

 belong to this genus ; but I think it probable that Pselaphus 

 ainbiguuSy Karsteniiy and signatus of Reichenbach may also belong 

 to it. 



STIRPS II. 



Corpus breve, convexum. Antennae undecim-articulatae. Palpi 

 maxillares elongati. 



GENUS II. BYTHINUS. 

 PSELAPHI. Fam. II. Reichenbach. 

 Corpus breve, depressum. 



Antennce articulo primo crasso, cylindraceo ; secundo primo 

 abrupte crassiore. Maris interne acute producto ; articulo 

 tertio, quarto, quinto, sexto, septimo et octavo aequallbus, 

 lenticulatis ; nono et decimo crassioribus lenticulatis ; un- 

 decimo ovato, apice acutissimo. 



Palpi maxillares articulo primo liliformi apice gradatim cla- 

 vato ; secundo ovato ; tertio ovato, scutiformi, maximo ; 

 basi angustissimo. 

 Body short, depressed. 



Antennce with the first joint thick, cylindrical; the second 

 abruptly thicker than the first ; the third, fourth, fifth, 

 sixth, seventh, and eighth equal, lenticular ; the ninth and 

 the tenth thicker, lenticular; the eleventh ovate vrith its 

 extremity very acute. 



Maxillari/ palpi with their first joint filiform, gradually clavate 

 (clubbed) ; the second ovate ; the third ovate scutiform 

 (shield-shaped) large, with its base very narrow. 



Bythinus Curtisianus. 

 B. saturate badius aut fusco-badius ; ore, antennis, pedibusque 

 rufo-castaneis ; thorace capite latiore ; elytris punctatis. 

 Bythinus Curtlsii. Leach, Zool. Miscell. iii. 83. 



