106 Mr. H. W. Bates on the Longicorn Coleoptera 



1. Alcidion oculatum, n. sp. 



A. oblongutn, postice modice attenuatum, tomento cervino subsericeo 

 vestitum : thorace maculis duabus nigro-fuscis, albo marginatis : 

 elytris lateribus acute carinatis, dorso Isevibus, utrinque fascia dis- 

 cali interrupta nigro-fusco ornatis. Long. 3f lin. 



Head and thorax tawny brown ; disk of the latter with two 

 short blackish lines, narrowly margined with whitish. Antennae 

 dusky, base of each joint from the fourth pallid; basal joint 

 gradually clavate, the outline waved beneath. Elytra prominent 

 at the shoulders, gradually narrowed to three-fourths of their 

 length, then more quickly so to the apex, which is briefly and 

 very obliquely ti'uncate, without spines : the sides are acutely 

 carinated ; the dorsal carina is effaced, but the centro-basal ridge 

 is very prominent, and crested with hairs ; the surface is punc- 

 tured (except near the apex) ; the colour is tawny or violaceous 

 brown, with a slight silky gloss, having on the disk behind the 

 middle a short blackish-brown fascia, bordered on the basal side 

 with pale ashy ; a small linear mark of the same colour is seen 

 also near the suture towards the apex, and the suture, disk, and 

 lateral margins have rows of small dark spots. Beneath tawny 

 ashy. Legs testaceous; thighs varied with ashy; tibise black 

 at the base and apex ; tarsi with the middle joints black. 



Ega ; on slender dead branches in the forest. 



2. Alcidion triangulare, n. sp. 



A. breve, postice valde attenuatum, fulvo-griseum : thorace fusco 

 bimaculato : elytris medio irregulariter cinereo fasciatis, apicem 

 versus cinereo strigosis, apice breviter oblique sinuato-truncatis. 

 Long. 3^ lin. 



Head dusky ; antennae testaceous brown, apices of the joints 

 from the third black, basal joint waved beneath. Thorax tawny 

 brown ; disk with two round blackish spots, sometimes wanting. 

 Elytra gradually narrowed from shoulders to apex, which latter 

 is very obliquely sinuate-truncate; the sides acutely carinated 

 from the shoulder, the carina effaced before the apex ; surface 

 even and punctured, the centro-basal ridge extremely prominent 

 and destitute of hairs : the colour is tawny brownish, with a very 

 indistinct, waved, ash-coloured fascia across the middle, the 

 apical part being silky brownish, streaked with ashy. Beneath 

 and legs testaceous brown ; base and apex of tibise and middle 

 joints of tarsi blackish. 



temo obtuse dentato ; carina dorsali tenui et acutissima, eentrobasali 

 parum prominente, lateribus discoque etiam carinatis, carinis obtusis 

 et abbreviatis. Subtus nigricans ; pedibus fuscis. Long. 5^ lin. 

 Hab. Venezuela. 



