374 Mr. D. Sharp's Contributions to the 



others obsoletely punctured, the 7th and 8th quite black; 

 seg^ments 3 — 5 a little constricted at the base. Legs 

 yellow, rather lono; ; lobes of tarsi strongly developed. 



In the male, on the underside, the seginonts oftlie hind 

 body are each flattened on the middle, and the 7th bears 

 a very dccj) and rather broad notch. 



Of this elegant species only a single male was found at 

 Tapajos. 



20. Stenus heres, n. sp. (Sect. II. B, Er.") Niger, sat 

 nitidus, antcnnis, ])alpi8, pedibusquc testaccis, his gcni- 

 culis, illis clava, infuscatis ; ])rothoi-ace subcylindrico, 

 dense fortiterque j)unctato; elytris dense fortiterque punc- 

 tatis, thorace longioribus; abdomine crebre fortiter, apiccm 

 versus subtiliter, punctate. Long. corp. I5 lin. 



Antennre elongate, yellow, with the club nearly black ; 

 3rd joint distinctly longer than 4th. Palpi yellow. Head 

 broad, about as broad as the elytra, rather coarsely punc- 

 tured ; the middle longitudinally a little elevated, and 

 between this and the eyes a small depression on each side. 

 Thorax longer than broad, much narrower than the elytra, 

 subcylindric, but the sides a little curved and slightly con- 

 tracted towards the base ; very densely and coarsely punc- 

 tured, so as to be rugose. Elytra elongate and outstanding, 

 much broader than the thorax ; the shoulders well marked 

 and rectangular, A'ery coarsely and closely punctured, but 

 the interstices quite broad enough to be shining. Hind 

 body cylindric, rather coarsely and closely punctured, very 

 finely and very scantily pubescent ; segments 3 — 5 much 

 constricted near the base. Legs yellow ; the base of the 

 tibife and the apical portion of the femora broadly infuscate ; 

 lobes of the tarsi long ; punctuation of metasternum and 

 under face of hind body very coarse ; genae rather coarsely 

 but not densely punctured. 



Ega ; a single individual, which I believe to be a 

 female. 



21. Stenjis cerritus, n. sp. (Sect, II. B, Er.) ^^neo- 

 niger, nitidulus, parcius albido-pubescens, fortiter profun- 

 dequc punctatus, antennis pedibusquc tcstaceis, palpis 

 pallide flavis ; abdomine parcius sat fortiter punctato. 

 Long. Corp. 2^ lin. 



Antennae yellow, elongate ; 3rd joint much longer than 

 4th, club elongate, 10th joint twice as long as broad 



