218 Mr. H. W. Bates on Longicorn Coleoptera. 



The disk of the thorax on each side is very convex, the mid- 

 dle is depressed, with a raised dorsal line ; on each side is a 

 large, rounded, velvety, dark-brown spot, which is impunctate, 

 the rest of the surface being punctured. The elytra are grey- 

 fulvous, the suture and some indistinct lines on the disk light 

 grey, covered with small rounded brown spots, confluent in 

 places ; the disk behind the middle is crossed by an elongate 

 dark-brown spot, besides which there are two transverse macular 

 lines of a yellowish colour. Body beneath black, scantily clothed 

 with grey ; the second to fourth ventral segments have a spot of 

 yellow hairs on each side. Legs pitchy, clothed with grey ; the 

 tarsi yellowish, the middle and hind tibise ringed with yellowish 

 at the middle and the apex. The fore tibise in the S are widely 

 and abruptly dilated from near the base. 



Para and Villa Nova. It is found also at Cayenne, and exists 

 in many collections under the name I have adopted. 



7. Acanthoderes alboniger, n. sp. 



A. oblongus, niger ; fronte, thoracis vitta mediana, elytrorum plaga 

 magna elongata basali communi fasciaque magna maculari sub- 

 apicali tomentosis ochraceo-albis ; ipso apice ocbraceo. Long. 

 7 1in. $. 



Head black, front ochreous punctured. Antennas shorter than 

 the body, black, the basal half of the third and the bases of the 

 remaining joints light grey. Thorax with the lateral tubercles 

 prominent, acute ; the disk depressed, longitudinally punctured, a 

 broad central stripe and a lateral one below the tubercle ochrey 

 white. Elytra oblong, their sides rounded posteriorly, their 

 apices sinuate-truncate, outer angles produced : the centro-basal 

 ridge is strongly pronounced, and produced forward towards a 

 corresponding sinuation in the hind margin of the thorax ; it is 

 smooth and shining, not reaching the middle of the elytra be- 

 hind, and leaving a broad depression at the base : the elytra are 

 punctured, partly in lines, most thickly so on the sides near the 

 base; black, a broad, basal, common stripe, including the scu- 

 tellum, notched in the middle externally, and a broad, macular, 

 uneven belt before the apex, not touching the suture, ochrey 

 white ; the extreme tips are yellowish brown. The black parts 

 are nearly naked, and have a few grey specks. Body beneath 

 and legs black, thinly covered with grey hairs; tarsi grey. There 

 is a row of ochreous points on each side of the abdomen. The 

 fore tibia? are widely dilated. The presternum is produced be- 

 hind, and the mesosternal tubercles are very prominent. 



Santarem. This species bears a superficial resemblance to 

 certain Curculionidse of the genus Heilipus, inhabiting the same 

 district. 



