316 Mr. D, SliJirp's Contribiitlonx to ihe 



small, ill-defined space behind the middle, smooth and 

 shining. Thorax i lin. in length, and hardly so broad, 

 not in the least curved at the sides, but a little narroAved 

 behind ; the whole surface covered with dense coarse ])unc- 

 tures, a very narrow, longitudinal, smooth line along the 

 middle ; the colour is similar to that of" the head, and it 

 bears a scanty, pale pubescence. Scutellum short and 

 broad, rounded at the extremity, punctured. Elytra about 

 as long as the thorax, dark blue in colour, the ])unctua- 

 tion rather coarse and moderately close, finer and more 

 sparing towards the extremity. Hind body shining black, 

 with the 8th segment and the hind margin of the 7th red ; 

 the connecting membrane of" segments 2 — 5 white, but 

 that between the 4th and 5th segments broadly infuscate 

 in the middle ; the segments are rather coarsely punctm-ed. 

 The legs are short and stout ; the front and middle tarsi 

 reddish, the front femora and tibia3 pitchy ; the trochanters 

 reddish, elsewhere nearly black. 



Tapajos ; a single specimen, apparently a female. 



16. Tceiiodema serpens, n. sp. Nigra, capite, thorace, 

 elytrisque plumbeis, fere opacis, dense fortiterque punc- 

 tatis ; antennarum basi, palpis, abdominisque apice rufis, 

 pedibus anterioribus piceis. Long. corp. 4| lin. 



Mas : abdomine segmento 7° venti-ali apice medio exci- 

 sione semicirculari magna, basi rigide nigro-setoso. 



Antenna? moderately long, distinctly thickened towards 

 the extremity, blackish ; 1st and 3rd joints short, of about 

 equal lengths, 4 — 10 each a little broader than its prede- 

 cessor, 1 0th about as long as broad. Palpi yellow ; mandibles 

 red. Head with the surface convex, faintly metallic, very 

 densely punctured, bearing a pale, upright pubescence ; a 

 very narrow space above the middle, smooth and shining. 

 Thorax rather longer than broad, almost straight at the 

 sides and slightly narrowed behind, transversely convex; 

 the whole surfixce very densely and coarsely punctured, 

 bearing a pale, upright pubescence. Scutellum small, 

 coarsely punctured. Elytra slightly longer than the 

 thorax, closely and coarsely punctured, a little shining, 

 with a pale, upright pubescence. Hind body black, red- 

 dish at the extremity, sparingly clothed Avith a pale pubes- 

 cence, most distinct on the 7th segment; the fom- basal 

 segments coarsely and closely punctured, the two following 

 ones much more indistinctly. Front legs pitchy, with the 



