322 Mr. D. Sharp's revision of the 



Acetalius, n. g. 



Maxillary palpi quite short ; terminal joint short and 

 stout, oval in form; penultimate joint very small. 

 Antennae 11-jointed, short, with very large acuminate 

 terminal joint, widely separated at their insertion. Head 

 elongate in front of the eyes, which are placed near the 

 hind angles, and are prominent, though rather small ; 

 antennal tubercles widely separated. Thorax elongate 

 and narrow. Elytra subinflated. Hind body with very 

 elongate basal segment, the others extremely short, the 

 basal scarcely, or at least only excessively finely, mar- 

 gined at the sides ; beneath composed apparently only 

 of two segments, a very elongate one, and a short apical 

 one projecting from it. Legs elongate ; hind tibiae with- 

 out spurs ; tarsi with a single elongate claw. 



The minute insect for which this genus is established 

 is of very doubtful affinities ; the structure of its hind 

 body is perhaps most like that of the Pselaphini, but the 

 true 1st ventral segment is quite short, while those 

 beyond the very elongate 2nd segment have disappeared ; 

 above the 1st segment is very elongate, while the follow- 

 ing are very short and almost perpendicular. These 

 peculiarities may perhaps be exaggerated, owing to the 

 fact that the unique individual is immature, and the 

 segments may therefore be collapsed to a certain extent. 

 The head is quite different from the Pselaphini, and more 

 like an elongate Euplectus head. The last joint of the 

 maxillary palpus is terminated at its point by a short, 

 straight, stout appendage. I can see no trace of a claw, 

 but as the specimen of this minute insect is immature, 

 and the feet have been covered with gum tragacanth, in 

 accordance with the bad habit of our English entomo- 

 logists, I may be mistaken on this point. 



Acetalius dubius, n. s. 



Angustulus, sordide testaceus, impunctatus, parce 

 pubescens ; prothorace elongato, ante basin transversim 

 depresso, basi in medio longitudinaliter carinato ; elytris 

 ad humeros angustis, stria suturali, aliaque discoidali 

 abbreviata. Long. 1^ mm. 



Antennae, with 1st and 2nd joints subequal, rather 

 elongate in comparison with the following ones ; 3rd 

 quite small ; the following ones small, very short ; 6th 



