PLEUKOCHKOMA. 133 



sinuate (not armed with a distinct spur), and obliquely truncate at 

 the apex. The tarsi are short and attenuated; the two basal joints 

 minute and triangular ; the third subcircular, and the fourth elon- 

 gated, and dilated at its extremity into a globular inflation, which 

 completely conceals from above the terminal claw. 



This pretty little group of insects readily separates itself from all 

 others : its broad depressed surface (not subglobose, as in Leptotrichm 

 or Homotyphus) and its more filiform antennas at once abundantly 

 distinguish it ; it differs also materially in the form of the maxillary 

 palpi, which are somewhat more elongate than in Homotyphus and 

 decidedly shorter than in Leptotrichus ; its general facies is depressed, 

 subparallel, broad, impubescent, and brightly coloured. From Pan- 

 chreetus it differs in its less globose body, in the form of its antennae, 

 and in its simple, unarmed posterior tibiae. 



1. PleurochroHia balteatum. (Tab. V. fig. 3.) 



P. oblongo-ovale, robustum, subcylitidricum, nigrum, nitidum; capite 

 brevi, depresso, inter oculos ruyoso, ad basin punctulato, niyro- 

 rufo ; thorace transverso, antice subcoarctato, subpunctato, et obso- 

 lete vermiculato, niyro-rufo ; elytris latis, p>unctato-striatis, ad 

 apicem obsolete pimctatis, niyris, vitta media transversa rufa ; an- 

 tennis brevibus, ad basin rujis, ad apicem fuscis ; pedibus rufo- 

 testaceis. 



Long. corp. 2 lin., lat. 1 lin. 



Oblong-oval, robust, subcylindrical, black, shining. Head short, 

 depressed, not produced ; eyes tolerably large, situated at the back 

 of the head, not extending laterally as far as the line of the margin 

 of the thorax ; the surface between the eyes rugose, above sparingly 

 punctate, dark rufous. Thorax not quite so broad as the elytra, 

 transverse, rectangular, slightly coarctate in front; the anterior 

 angles depressed ; sides marginate ; the surface equate, subpunctate, 

 with short minute impressed lines thickly interspersed among the 

 punctures ; dark rufous. Scutellum triangular, rufous. Elytra some- 

 what broader than the thorax, subcylindrical, with rows of punc- 

 tures arranged in the form of striae (these punctures become obsolete 

 towards the apex) ; black, with a broad transverse medial band of 

 rufous extending from the margination and slightly widening as it 

 approaches the suture. Antemue short, subclavate, at the base ru- 

 fous, towards the apex fuscous. Leys rufo- testaceous. 



From the district of the Amazon. In the collections of Mr. Baly, 

 Mr. Bates, and the Rev. H. Clark. 



