70 
hinder part punctured. Elytra subtrigonal, depressed, with 
lateral carinse ; centro-basal ridges moderately elevated, and not 
abrupt posteriorly ; apex obliquely sinuate-truncate, angles not 
produced; the surface (except towards the apex) has a number 
of large punctures, and is of an ashy-brown colour, with a num- 
ber of oblong dusky spots on the apical portion. Body beneath 
and legs dusky ; base of thighs and of the first tarsal joint and 
a ring on the tibise pale testaceous. 
Taken flying in the evening, banks of the river, S. Paulo, 
Upper Amazons. 
The species, from its small size and general appearance, would 
consort well with those I have placed in the genus Ozines ; but 
the absence of lateral thoracic spines compels us to treat it as a 
member of the Alcidion group *. 
Genus Lophopceum, nov. gen. 
Head, antennse, and general shape of the body as in Alcidion, 
The thorax differs from that and the allied genera in being 
armed near the centre of each side with an acute tubercle or 
* The following species also belong to the second section of Alcidion : — 
A. bicristatum. Elongatum, postice sensim attenuatum, olivaceo-griseum, 
fusco variura. Caput olivaceum. Antennse infra parce setosse, articulo 
basali angulo inferiore apicali producto, olivaceo-brunnese^ articulis basi 
pallidis. Thorax dorso obtuse tuberculatus, antice et postice punctatus, 
olivaceo-griseus, subsericeus. Elytra elongata, depressa, postice sensim 
attenuata, apice oblique sinuato-truncata, angulis externis productis ; 
lateribus et disco obtuse carinatis; carinis centrobasalibus parum pro- 
minentibus, singulis cristis duabus pilorum nigrorum ornatis ; elytris 
utrinque penicillis minutis atris in duplici serie (altera suturali, altera 
obliqua discoidali) notatis : olivaceo-grisea, tertia parte posteriore satu- 
ratiore griseo lineata, marginibus nigro punctatis. Corpus subtus gri- 
seum, pedibus olivaceo-griseis nigro punctatis, femoribus basi testaceis. 
Abdomen fceminse segmento ultimo dorsali apice attenuate producto, 
maris rotundato medio emarginato. Long. 5 lin. S $ . Hab, Rio 
Janeiro. (Coll. Squires.) 
A. trivittatum, Elongatum, depressum, postice sensim attenuatum, brun- 
neo-sericeum, vittis et maculis fusco-atris ornatum. Caput fuscum. 
Antennse rufescentes, articulis basi pallidis, articulo basali sequaliter 
clavato. Thorax rotundatus, dorso sequalis, olivaceo-brunneus, sericeus, 
vittis latis tribus atro-fuscis velutinis (una centrali, alteris lateralibus) 
marginem anticum hand attingentibus ornatus. Elytra elongata, de- 
pressa, apice sinuato-truncata, angulis internis acutis, externis valde 
productis, humeris parum prominentibus, lateribus utrinque acute 
flexuoso-carinatis ; disco sequalia ; carina centrobasali valde prominente, 
brevi, nuda; rufescenti-brunnea, certo visu carnea nitentia, passim punc- 
tata et fusco maculata ; lateribus prope basin fuliginosis ; disco pone 
medium plaga atro-fusca antice utrinque linea obliqua grisea marginata 
ornato. Corpus subtus nigricanti-sericeum. Pedes nigricantes, tibiis 
et tarsorura articulo primo cano annulatis. Long. 5 lin. Hab. Ve- 
nezuela, 
