LUPERODES SCUTELLATUS. 47 



the latter obtuse , surface slightly convex , entirely impunc- 

 tate. Scutellum trigonate, shining black. Elytra broader 

 than the thorax , slightly widened posteriorly , the shoul- 

 ders raised and limited within by a longitudinal depression , 

 surface microscopically finely punctured. Tibiae obscure 

 piceous , armed with a distinct spine , posterior first tarsal 

 joint longer than the 3 following ones together. Claws 

 appendiculate. Coxal cavities open. 



Eleven specimens from Soeroelangoen (Sumatra-Expedition). 



Some specimens have the head and thorax of a fulvo- 

 piceous colour, but the scutellum is constantly black. 



Arcastes sumatrensis , n. sp. 



Oblong-ovate , black below. Head , thorax , anterior fe- 

 mora and basal joint of the antennae fulvous. Elytra 

 distinctly punctured , black , a large rounded patch at the 

 middle of each elytron , testaceous. — Length 2 lines. 



Head impunctate, transversely grooved between the an- 

 tennae ; encarpae contiguous. Labrum and palpi piceous. 

 Antennae nearly as long as the body, second and third 

 joints very short , nearly equal , the middle joints slightly 

 compressed and dilated, closely pubescent, basal joint ful- 

 vous , the rest black. Thorax transverse , the sides nearly 

 straight , the anterior angles thickened , surface impunctate, 

 with an obsolete transverse depression at each side. Scu- 

 tellum black. Elytra closely but not very strongly punct- 

 ured , black , the yellowish patch extending from before to 

 below the middle. Metatarsus much longer than the three 

 following joints together. Posterior tibiae mucronate. Coxal 

 cavities open. 



A single specimen from Soepajang (Sumatra-Expedition). 



This , the second species of the genus , differs a little 

 in regard to structural details from its ally in the less but 

 still distinctly dilated middle joints of the antennae and 



Notes from the Leyden IVLuseuxn, "Vol. "VI, 



