the Dasytinae of South Africa. 395 



Calosotis. 

 Calosotis Redtenbacher, Reise Novara, ii, p. 106 (1867). 



Dr. Holdhaus lias been kind enough to present a co-type 

 of the S. African C. setulosa Redt., the type of the genus, 

 to the British Museum. It is nearly related to Dasytiscus 

 Kies., differing therefrom in having the antennae very 

 short and obliquely serrate ; the anterior and intermediate 

 tibiae armed with a rather long, stout spur at the inner 

 apical angle (somewhat incorrectly described as " calcare 

 cochlaeaformi " by Redtenbacher) ; the tarsal joints 1-4 

 simple, short, and equal in width (1-3 are widened and 

 4 small in Dasytiscus) ; the claws small, equal, and furnished 

 with a connate membranous appendage beneath; the 

 upper surface of the body clothed with numerous, erect 

 bristly hairs intermixed with the fine greyish pubescence. 

 Length 2 3 mm. 



No such insect has been found in the Cape Town Museum 

 or in the extensive collections recently made in the same 

 region by Mr. R. E. Turner ; and it is probable that some 

 mistake was made regarding the locahty given, " Vorge- 

 birge." The stout tibial spurs may be peculiar to the (^L 

 C. barkeri Pic (1904), from Natal, has been referred by me 

 to Hapalochrus. 



Apteuodasytes, n. gen. 



Antennae inserted at some distance before the eyes, 11 -jointed, 

 slender; terminal joint of the maxillary and labial palpi narrow, 

 subfusiform ; mandibles stout, acute at tip, toothed at the apex 

 beneath ; labrum small ; head simple, not wider than the j^rothorax, 

 the epistoma confused with the front ; prothorax subcylindrical ; 

 scutellum very small ; elytra extremely short, not longer than the 

 pronotum, leaving six abdominal segments exposed; tibiae narrow; 

 tarsi clearly 5-jointed, sim.ple, the claws short, small, equal, fur- 

 nished with a membranous appendage beneath which nearly reaches 

 the apex of the claw; wings wanting; body elongate, narrow, 

 hairy, staphyliniform. 



Type, A. staph ylinoides. 



The single species referred to Apteroclasytes bears a 

 remarkable resemblance to the Omaliid-genera Arpedium 

 and Micralymma. The two sexes have not been identified ; 

 but as there is some variation in the length of the antennae 

 in the specimens before me, it is possible that both cJ and 9 

 are represented. The elytra are not longer than the 



