(Paje 255) 



Body rather equally broad, smoothly convex; the head narrower than 

 pronotum, somewhat imbedded in this and scarcely constricted behind; eyes 

 round and a little protruding, temples and genae sharply margined; anten- 

 nae rather robust, but scarcely longer than head and pronotum together; 

 maxillary palpi somewhat elongate, their fourth joint fine and very little 

 shorter than the third; labial palpi (Fig. 92) porrect, stiff, only two- 

 jointed, the joints equally long and the last joint feebly curved; the 

 tongue fine, narrow and at tip undivided (as in Leptusa ). 



Fig. 92. Labium with labial palpi and tongue of Silusa . (t. Reitte^. 



Pronotum strongly transverse, twice as broad as long, about as broad 

 as elytra, not narrowing posteriorly, sides smoothly rounded , hind cor- 

 ners obtuse-angular and posterior margin inside these more or less distinct- 

 ly incurved; elytra longer than pronotum, their posterior margin inside 

 the outer corners rather deeply incurved; abdomen evenly broad, its first 

 three free dorsal joints depressed at base, the fifth not longer than the 

 fourth, the legs rather slender; fore- and middle-tarsi 4-jointed, only 

 hind tarsi 5-jointed, and the first four joints of these about equally 

 short, distal joint as long as the first three together. - In the o dis- 

 tinct sex-characters are present. 



The species occur at outflowing tree-sap and under bark; of the few 



known European species, one is found in this country. 



1. S. rubiginosa Br. 



(Srichs. Kaf. liflc. Br. I, 378; Gen. Spec. Staph. 2C6; Kraatz Ins. i;. II, 

 47; Thoms. Skand. Col. IX, 280; Muls. et Rey Bre'vip. 1871, 153; CJanglb. Kaf. 

 M. II, 290). 



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