StKpkylinida; of the Amazon Valley. 297 



than its predecessor, 7 — 9 differing little from one 

 another, 10th slightly stouter and shorter than 9th, small, 

 about as long as broad ; 11th joint a good deal longer and 

 distinctly stouter than 10th. Head large, subquadrate ; 

 the eyes prominent and rather large ; the vertex straight, 

 but emarginate at the neck ; the hind angles but slightly 

 rounded, reddish, densely punctured, the punctures dis- 

 tinct, and each umbilicate, the interstices extremely fine. 

 Thorax scarcely narrower than the head, and very slightly 

 narrower than the elytra, nearly as long as broad ; the front 

 rounded, the sides slightly convergent behind ; the colour 

 and sculpture similar to those of the head, but the latter 

 rather finer and less distinct. Elytra rather longer than 

 the thorax, quadrate, rather finely and closely punctured ; 

 a large spot on the side of each black, and the suture also 

 blackish, but with this colour not reaching to the scu- 

 tellum. Hind body broad and short, densely, finely and 

 indistinctly punctured ; the basal segments reddish, the 

 5th infuscate, the 6th pale yellow. Legs pale yellow, 

 rather short. 



Ega ; a single female. 



Obs. — This species is closely allied to iS". hrevis, but is 

 larger, and its thorax is less transverse ; I have not been 

 able to examine satisfactorily the mandibles and labrum 

 of the only individual I possess, but from what I can see of 

 them, I have little doubt they are very similar to those of 

 S. brevis. 



11. Sunius conjinis, n. sp. Rufescens, antennis, pedibus, 

 elytrisque testaceis; capite thoraceque dense punctatis, 

 fere opacis, hoc elytris multo bi'cviore et angustiore ; elytris 

 leviter nitidulis, crebre punctatis. Long. corp. 1^ lin. 



AntennfB pale yellow, moderately slender, shorter than* 

 head and thorax; 1st joint almost as long as the three 

 following together ; 3rd joint about as long as, but a good 

 deal thinner than 2nd, 5 — 10 scarcely differing in length, 

 each about as long as broad, and just a little broader than 

 its predecessor; 11th distinctly stouter than the 10th. 

 Labrum with two short but distinct denticles in the 

 middle. Mandibles moderately long and slender, their 

 teeth very indistinct. Head rather long and narroAV, dis- 

 tinctly broader than thorax, and narrower than elytra; the 

 eyes placed in the middle of the sides, convex and pro- 

 minent, the hind angles rounded ; reddish in colour. 



