12 {June, 
et in medio indeterminate infuscatis, late sericeis ; antennis elongatis, articulis 
2—6 leviter infuscatis ; thorace valde transverso, angulis anticis nullis, rotun- 
datis, postice modice angustato, angulis posticis obtusis, margine pone hos 
obliquo, supra sulco basali profundo ; elytris striis 4 vel 5 distinctis, sed leviter 
impressis, interstitro 4t¢ disco puncto magno setigero. Long. 1 lin. 
The elytra have a silky, iridescent gloss, and the striw, although 
broad and distinct, are so shallow, that they are scarcely visible in 
certain lights. 
Sandy margins of pools, R. Tapajos: abundant. 
TACHYTA PARALLELA, n. sp.—Oblonga, depressa, lateribus parallelis, 
rufo-testacea, vertice elytrisque obscurioribus, his apice macula magna, anten- 
nis pedibusque flavo-testacers ; thorace lato, transverso, antice elytris vix angus- 
tiori, postice paulo angustato, margine laterali late explanato, reflexo ; elytris 
parallelis, apice obtuse rotundatis, strivs 3 vel 4 via impressis. 
Long. 1 lin. 3 exempl. 
Of more depressed form than the European 7. n2na, and distin- 
guished by the flattened lateral borders of the thorax, which are 
turned upwards, so as to create the appearance of a groove separating 
them from the disc. The elytra are very obtusely rounded at the apex. 
Ega, Upper Amazons: under bark of trees. 
TACHYTA MELANIA, n. sp._-Oblongo-ovata, depressa, nigra vix ceneo tincta, 
antennis tibiis tarsisque piceo-testaceis ; thorace quadrato, postice vix angustato, 
lateribus sub-rectis, angulis omnibus rectis, distinctis, margine laterali expla- 
nato-reflexo ; elytris striis 3 leviter impressis, 2—3 valde abbreviatis, punctu- 
latis, alteris indistinctis, stria 3'@ bipunctata. Long. 1 lin. 2 exempl. 
Resembles the Venezuelan 7. marginicollis, Schaum, but is without 
pale margins to the pro-thorax. The flattened margins of the thorax 
are separated from the dise by a distinct groove. 
Rio Janeiro. From the collection of the late Rev. Hamlet Clark. 
TACHYTA XANTHURA, n. sp.—Depressa, enco-picea, epistomate, partibus 
oris, antennis, pedibus, thoracis lateribus elytrorumque macula apicalt fulvo- 
testaceis ; thorace transversim quadrato, postice viz angustato, angulis posticis 
rectis, marginibus lateralibus explanatis, intus fortiter sulcatis ; elytris strus 
4 leviter impressis. Long. & lin. 1 exempl. 
Rio Janeiro. From the collection of the late Rev. Hamlet Clark. 
The thorax is very similar in form to that of 2. melania, having the 
sides nearly straight to the well-marked posterior angles, but the flat- 
tened borders are pale fulvo-testaceous, like the legs, antenne, anterior 
part of the head, and apex of the elytra. 
TACHYTA CRUCIGERA, n. sp.— Depressa, picea, epistomate, partibus 
ovis, antennis, pedibus, thoracis lateribus et elytris fulvo-lestaceis, his 
