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



fasciis duabus interruptis lituraque subapicali nigris. Long. 4 

 lin. S. 



Head pinkish grey, occiput with two stripes and a posterior 

 spot black. Antennse pitchy black ; bases of joints grey, those 

 of sixth, eighth, and tenth joints whiter. Thorax widened Joehind 

 the middle, and forming there an acute prominence, constricted 

 behind. Surface pinkish grey, with a dorsal vitta (constricted 

 behind the middle), a lateral stripe, and two fine lines on each 

 side black. Scutellum black, with a minute grey spot at the 

 base. Elytra gradually narrowed from base to apex, sinuate- 

 truncate, w^ith the sutural angles produced into a short, the ex- 

 ternal into a long tooth : surface sparingly clothed with fine 

 setse, punctured, grey, sprinkled wath pinkish patchy spots, a 

 short stripe under each shoulder (continuous with the lateral 

 thoracic stripe), a very short streak proceeding from each angle 

 of the scutellum, a spot on the disk near the base, a short fascia 

 behind the middle, and a curved letter near the apex black. 

 Body beneath grey. Legs grey, ringed with black : fore tarsi 

 in the 6 moderately dilated and fringed. 



S . Terminal ventral segment strongly elevated towards the 

 tip, the elevation surmounted by a curved ridge, leaving a smooth 

 concave space within; second segment strongly contracted in 

 the middle. 



Banks of the Tapajos; one example. This and the preceding 

 species are closely related to a Venezuelan species of much larger 

 size *. 



9. Colohothea obtusa, n. sp. 



C. modice elongata, postice atteiiuata, fusco-nigra, cinereo maculata ; 

 thorace brevi, pone medium parum tumiduio, deinde leviter con- 



* Colohothea lineola (Chevrol. MS. sec. Dom. Deyrolle). — Elongata, pos- 

 tice sensim attenuata, grisea, fulvo nigroque variegata. Caput nigricans. 

 Antennae nigricantes articulis basi griseis. Thorax usque ad medium 

 dilatatus, lateribus pone medium valde acute tuberculatis, deinde basin 

 versus sinuato-attenuatus ; supra griseus fulvo variegatus, medio vitta 

 postice dilatata, altera laterali lineolisque duabus intermediis nigris. 

 Scutellum postice angustatum, nigrum, macula grisea. Elytra gra- 

 datim attenuata, truncata, angulis suturalibus simplicibus, exterioribus 

 valde productis, humeris prominulis parum obliquis ; supra breviter 

 setosa, punctata, grisea, punctis nigris maculisque carneo-griseis varie- 

 gata, utrinque maculis angulatis tribas quarum una pone medium 

 major. Corpus subtus cinereum : abdominis medio et lateribus nigro 

 maculatis; segmento apicali nigro, basi cinereo maculato. Pedes cinerei, 

 nigro annulati : tarsis anticis maris valde dilatatis et ciliatis. Maris 

 segmentum ultiraum ventrale simplex, late irregulariter truncatum, an- 

 gulis baud productis ; dorsale obtusum : foeminae segmentum ultimum 

 ventrale angulis dentatis ; dorsale magis attenuatum, apice breviter 

 emarginatum. Long. Q\-^. c? ? . Hab. Venezuela. 



