LONGICORNIA.. 379 
obsolete. The forehead is clothed with an ochreous-brown tomentum, and the granule 
over the base of the elytra and the base of the carine are much more numerous than 
in A. lugens. The two species are very closely allied. 
15. Acanthoderes purulensis. (Tab. XXIII. fig. 7.) 
A, lugenti proxime affinis. Trigono-oblongus, fusco-niger, griseo-albo et fusco plagiatim tomentosus ; fronte 
alba; thoracis dorsi carinis valde elevatis, compresso-conicis apice indentatis; elytris apice angustis, 
sinuato-truncatis, angulo exteriori breviter producto, carinis dorsalibus flexuosis versus basin elevatis 
et crebre granulatis, tota basi et humeris sparsim granulatis, macula magna obliqua humerali, et area 
suturali albo-grisea vel grisea, hac fusco-guttata; prosterno postice et mesosterno apice subverticalibus, 
bituberculatis ; antennis nigris albo-annulatis, articulis 3°-—4™ conjunctis ceteris sequentibus subequalibus. 
Long. 63-7 lin. 3 9. 
Hab. Guatemaua, Purula (Champion). Three examples. 
16. Acanthoderes polystictus. (Tab. XXIII. fig. 8.) 
A, inquinato proxime affinis; differt elytrorum coloribus. Sat elongatus, fulvo-fuscus, elytris signaturis 
angustis ochraceis, guttisque innumerabilibus et circumflexa utrinque post medium, nigris; fronte nigra; 
thorace carina dorsali tuberculoque utrinque compresso (postice gradatim declive), interstitiis grosse punc- 
tatis ; elytris sat elongato-trigonis, apice recte truncatis, angulo suturali recto, exteriori longe spinoso, 
dorso haud carinatis, carinula obtusa centro-basali excepta, dimidio basali sat dense nigro-granulatis deinde 
usque ad apicem nigro-punctatis, margine basali utrinque lete flavo-cinereo sericeo; mesosterno subver- 
ticali et bituberculato ; pedibus elongatis, tibiis 4 posterioribus griseis annulis duobus nigris, tarsis anticis 
é articulis 1°-3™ nigris, 4 posterioribus articulis nigris apice griseis, unguibus rufo-testaceis; antennis ¢ 
quam corpus dimidio longioribus, fusco-nigris, articulis 3°-8" annulis duobus griseis, articulo 10° scopifero. 
Long. 54-9 lin. ¢ Q. 
Hab. Panama, Bugaba (Champion). 
Belongs to a numerous group of the genus, which includes A. vetustus, A. pigmen- 
tatus, A. longitarsis, A. bivitta, A. inquinatus, and others, characterized by their elon- 
gated body and joints 4-11 of the antenne, and the transverse truncature and long 
apical spines of the elytra. It differs from A. inguinatus in the prevailing colour of the 
elytra being tawny brown, not ashy grey. From the very similarly-coloured and punc- 
tured A. vetustus it constantly differs in the form of the lateral (dorsal) carine or 
ridges of the thorax, which form long compressed tubercles gradually rising from 
behind, whilst in A. vetustus they are abruptly raised and almost hook-shaped. 
17. Acanthoderes umbratus. (Tab. XXIII. fig. 9.) 
A, laterali proxime affinis. Brevis, fulvo-fuscus; thorace lateribus elytrisque fasciis obliquis lateralibus valde 
dentatis duabus (altera latiori pone medium altera angustiori prope apicem) guttisque suturalibus, satu- 
ratius fuscis ; thorace tuberibus dorsalibus utrinque compresso-conicis, apice bituberculatis ; elytris trigonis, 
apice truncatis anguloque exteriori longe spinosis, carinis dorsalibus apud basin valde divaricatis et 
elevatis, multituberculatis, basi sparsim granulatis deinde fere levibus ; antennis brevibus, articulis 3°-4™ 
conjunctis quam cetera sequentia longioribus ; pro- et mesosterno verticalibus, bituberculatis. 
Long. 5-7 lin. 3 2. 
Hab. Guatemata, Cerro Zunil (Champion). Many examples. 
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