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



3. Trestonia albilatera, Pascoe. 

 Hesyeha albilatera, Pascoe, Trans. Ent. Soc. n. s. v. pt. 1. 25, 



T. elongato-oblonga, apicem versus paulo attenuata, subdepressa, 



fusca, fulvo minute varia; capite latiusculo, fronte ochracea, tuber- 



culis antenriiferis intus in lobulos erectos oblongos productis ( c?) ; 



elytris utrinque plaga maxima laterali (fere ad basin extensa) cana, 



postice nigro marginata. Long. 6| lin. S . 



Similar, in its elongate- oblong subdepressed form of body and 



general colour, to T. ramuli, but differs in the elytra being much 



less prominent at the shoulders, and not attenuated, except from 



very near the apex ; the pale lateral spot, too, is much larger 



and whiter, extending from behind the middle to the shoulders. 



The thorax is cylindrical and very uneven on its surface, as in 



T. ramuli; but it has two transverse impressed lines near the 



hind margin, and a distinct conical lateral tubercle, much behind 



the middle. The forehead is clothed with dense tomentum of a 



pale ochreous hue. The underside of the body is ashy, with a 



broad rusty-tawny stripe down the middle of the abdomen. 



The antennae are very slender and twice the length of the body 



in the male ; the terminal joints are greatly elongated, and the 



third with a scarcely perceptible bend. 



Ega, on branches of trees. 



4. Trestonia coarctata, n. sp. 

 Trestonia terminata, Buquet, Thorns. Arc. Nat. p. 47, pi. 5. f. 3? 



T. cylindrica, cinereo- fusca, fulvo varia, vertice coarctato ; antennis 

 basi valde approximatis, articulo basali elongate, apice abrupte 

 clavato ; elytris crebre punctatis, apice nigris, fulvo lituratis. 

 Long. 4|-6 lin. d 2 • 



The form of body and situation of the dark apical spot (close 

 to the apex of the elytra) in this species so closely resemble the 

 same features in the figure above quoted of T. terminata, that it 

 is not unlikely the specimens here treated of belong to that 

 species. I cannot, however, reconcile the description of the 

 colours given by M. Buquet with my insects; and the figure is 

 as uncertain in this respect as the description. His words are, 

 " Couleur generate d'un gris-verdatre melange de blanc et par- 

 fois de jauufitre sur le devant de la tete, sur les bords lateraux 

 du prothorax et sur la partie inferieure des elytres." The head 

 in all my specimens is of a pale ashy hue, with a dark-brown 

 spot on the upper part of the forehead between the eyes. The 

 elytra as well as the thorax are dark brown, clothed with thinnish 

 ashy pile, and sometimes varied with tawny, and becoming of a 

 paler ashy hue near the dark apical spots. The thorax has a 

 number of large scattered punctures, and the elytra are thickly 



