158 LONGICORNIA. 
panied by two dorsal tubercles of the same size and form, and two elytral tubercles (in 
the position of the centro-basal ridges or crests) also similar in size but less compressed 
laterally. 
1. Hexacona armata. (Tab. XII. fig. 15.) 
Purpurascenti-fusca, subsericeo-nitens, elytris guttulis et plagis lateralibus (quarum mediana majore versus 
suturam fasciatim extensa) saturatius fuscis ; antennarum articulis basi pallidis ; corpore subtus pedibusque 
sericatis, his subrufescentibus, tibiis testaceo annulatis, tarsis articulo primo griseo; elytris punctatis, 
prope apicem angustatis, apice oblique sinuato-truncatis, angulo suturali recto, exteriore valde producto. 
Long. 8 lin. 
Hab. Costa Rica, Rio Sucio (Rogers). 
CATHARESTHES. 
Corpus sicut in Acanthodere robustum, oblongo-ovatum. Caput antice verticale, sat elongatum, subplanum. 
Antenne (¢) corpore dimidio longiores, haud ciliate, scapo elongato, subtus paullo flexuoso, apice sim- 
plici; articulo tertio quam scapum paullo longiore. Thorax modice transversus, tuberculo laterali valido 
conico, alteris duobus discoidalibus magnis obtusis vix elevatis. Elytra subtrigona, apud basin thorace 
fere duplo latiora, absque carinis, tuberculo centro-basali grosso parum elevato, apice sinuatim truncata 
utrinque bidentata, supra passim discrete punctata, versus basin sat grosse tuberculata. Pedes robusti, sat 
elongati; femora grosse clavata, posteriora elongata et longe pedunculata ; tarsi postici articulo primo 
quam duo sequentes paulo longiore. Prosternum modice angustum; mesosternum latum quadratum. 
Abdominis ( 3) segmento apicali elongato subconico, pygidio profunde emarginato fere bispinoso, segmento 
ventrali leviter sinuato. 
This genus belongs to the same group as the preceding ; but its robust form gives it 
a totally different facies from that prevalent among the Acanthocinini, and it would 
readily be mistaken for an Acanthoderes; the closed outer suture of the: anterior 
acetabula, and the length and shape of the antennal scape, however, leave us in no 
doubt as to its true affinities. 
1. Catharesthes elegans. 
Fuscus, brevissime setosus, vertice et thorace atro-fusco maculatis, elytrorumque punctis omnibus atro-fusco 
marginatis ; elytris fascia angusta paullo irregulari pone medium liturisque juxta apicem albo-cinereis ; 
antennis articulis basi, tibiis annulo lato tarsisque articulo primo griseis. 
Long. 63 lin. CS. 
Hab. GuatEMaLa, Purula (Champion). 
The dark brown rounded spots, which are sprinkled over the upper surface, cover the 
numerous punctures of the elytra and others which exist also on the hind part of the 
thorax; but there are similar spots without punctures on the occiput and thorax, viz. two 
on the former and two each on the discoidal tubercles of the latter. The tubercular 
granulations of the elytra, which are strongly marked near the base and accompany 
the punctures nearly to the apex, are also dark brown. 
