390 Mr. H. W. Bates on the Longicorn CoJeoptera 



tips of joints blackish, bases of alternate joints whitish. Thorax 

 with nine ashy longitudinal lines, the central one the slenderest, 

 the second (from the central one) not reaching the hind margin, 

 and the two lateral ones on each side very oblique. Elytra 

 moderately short and tapering, apex sinuate-truncate, external 

 angle produced into a long tooth ; dark purplish brown, sprin- 

 kled near the base and apex with ashy dots, which unite here 

 and there in irregular strigse ; the central space clear, and having 

 in the middle of each elytron a large round white spot ; there is 

 also a small white spot on the suture near the scutellum. Body 

 beneath clothed with dingy-ashy pile ; abdomen spotted with 

 black. Legs purplish brown, ringed with ashy. 



^ $ . Terminal abdominal segment similar in form in the 

 two sexes, longer and tapering in the female; the ventral plate 

 in both truncated, with angles simply acute; the dorsal plate 

 distinctly notched in the middle of its apex in the female, obtuse 

 in the male. Tarsi simple in the male. 



A common insect on dead branches, &c., at Ega. 



22. Colohothea latevitiata, n. sp. 



C. elongata, angustior ; thorace sordide fulvo-cinereo, vitta lata me- 

 diana alteraque tenui laterali fuscis ; elytris postice attenuatis, 

 humeris valde obliquis, fuscis, maculis fulvo- vel sordide cinereis 

 plagiatim conspersis. Long. 4-5 lin. cS $ . 



Head blackish, streaked with tawny, vertex with a single 

 tawny line extending to the occiput. Antennse long and slen- 

 der, dusky brownish at the tips and ashy at the bases of the 

 joints. Thorax with a small acute prominence on each side near 

 the base ; clothed with dingy tawny or ashy tomentum, leaving 

 a broad stripe in the middle and a slender line on each side of 

 the disk dark brown. Elytra rather slender and tapering; 

 shoulders very oblique, apex somewhat narrow and sinuate-trun- 

 cate, with sutural angle slightly prominent, external dentiform ; 

 surface brown, covered with dingy ashy or tawny spots, which 

 unite together in patches, leaving irregular brown spaces. Body 

 beneath dingy tawny ; abdomen not spotted with black on the 

 sides. Legs rusty brown, varied with black, and ringed with 

 ashy. 



^ . Anterior tarsi dilated and fringed. Terminal abdominal 

 segment short, truncated; ventral plate emarginated at the 

 apex. 



$ . Terminal abdominal segment greatly elongated and sub- 

 tubular ; dorsal plate slender, obtuse ; ventral truncated, angles 

 not produced. 



Var. Obydensis, A female example in my collection from 

 Obydos, on the Guiana side of the Lower Amazons, differs from 



