28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.66 



tion, nearly smooth, only indistinctly punctate and granulose. 

 Scutellum triangular, acute at apex, with the surface obsoletely 

 granulose. Elytra Avith the sides broadly rounded behind the hu- 

 meral angles, strongly, broadly, arcuately constricted at middle, then 

 broadly arcuately expanded at apical third, and finally obliquely 

 attenuate to the tips, which are separately broadly rounded, with the 

 lateral margins entire; humeri moderately developed; each elytron 

 with a broad, rather shallow basal depression, with a distinct feebly 

 sinuate lateral carina extending from the humeral angle to a little 

 beyond the middle of elytron, and w^ith the suture strongly elevated 

 from basal fourth to apex; surface coarsely densely granulose, and 

 feebly transversely rugose on the disk, with a few obsolete punc- 

 tures, which have a tendency of forming rows on the disk. Abdo- 

 men beneath densely, finely granulose, with a few obsolete punctures 

 intermixed, and sparsely clothed with very short inconspicuous 

 hairs. 



Length, 3.5 mm. ; width, 1 mm. 



Type locality. — Rurrenabaque (Beni River), Bolivia. 



Type.— C^t. No. 26978, U.S.N.M. 



Described from a unique specimen, probably a female, collecte-' at 

 the type locality during December, 1921. 



PARAGRILUS PULCHELLUS, new species 



Male. — Rather broadly elongate, and moderately shining; head 

 aeneous; pronotum and scutellum aeneo-cupreous, the former with 

 the disk purplish, and the median part of a more or less dark 

 bluish color; elytra dark blue, Avith a strong purplish tinge in cer- 

 tain lights; beneath piceous, with a feeble seneous reflection, and 

 more shining than aboA^e. 



Head moderately convex, distinctly flattened behind the epistoma, 

 with a longitudinal groove extending from the occiput to flattened 

 area in front, the groove rather obsolete on the occiput, and more 

 broadly and deej)ly impressed on front; surface coarsely, densely 

 granulose, and rather densely coarsely punctate, the punctures very 

 shallow, irregularly placed, and becoming denser on the flattened 

 area behind epistoma, Avhere the surface is densely clothed with 

 short, recumbent, scale-like yellow hairs; antennal cavities separated 

 on the front by about the diameter of the cavities ; epistoma broadly, 

 deeply, arcuately emarginate in front. Pronotum feebly convex, 

 rather uneven, one and one-third times as wide as long, apex and 

 base about equal in width, and widest just behind the middle; sides 

 when A^cAved from above feebly arcuately expanded to just behind 

 the middle, then arcuately emarginate and feebly attenuate to pos- 

 terior angles, which are rectangular; anterior margin bisinuate, 

 with the median lobe broadly rounded ; base abruptly, but feebly ar- 



