40 LONGICORNIA. 
sulcus, giving it a gibbous appearance when viewed in profile. Both species agree 
also in the smoothness and opalescent gloss of the thoracic surface; its colour, how- 
ever, is different, the red occupying the basal half in O. rostrata, and forming three 
longitudinal stripes in O. levicollis. The base of the elytra is broad and straight, but 
oblique just before the angular shoulders. The epipleure are vertical and rather 
sharply separated from the plane dorsal surface. 
6. Ophistomis flavirostris. 
Gracilis, nigra, elytris parallelis griseo-setosis; capite infra, fronte, thorace angulis posticis femoribusque 
basi flavis; thorace campanuliformi, convexo, subtiliter ruguloso; elytris creberrime punctulatis, humeris 
vittula rufescente. 
Long. 44 lin. 
Hab. GuateMata, Zapote (Champion). 
A small parallel-sided species, with ashy-pubescent elytra. In colours it resembles 
O. albicollis (Pascoe), from which it differs widely in form and sculpture. The crown 
and occiput behind, and the mouth and its borders in front, are black; all the rest of 
the head is bright yellow. ‘The antenne are black. The thorax is wide behind and 
narrowed in curved lines to the anterior sulcus, the surface being a little less convex 
than in 0. levicollis, minutely sculptured, and opaque; the yellow colour at the 
posterior angles forms a large spot reaching halfway up the side and on the flank of 
the thorax. The elytra are very closely punctured, and have a faint reddish streak 
proceeding from each shoulder. The underside of the body is ashy black, the legs 
black, with the basal halves of the femora and the base of the four hinder tarsi yellow. 
7. Ophistomis nigella. (Tab. IV. fig. 20.) 
Ophistomis nigellus, Bates, Trans. Ent. Soc. 1872, p. 233. 
Hab. Nicaraeva, Chontales (Belt). 
8. Ophistomis pallida. (Tab. V. fig. 2.) 
Ophistomis pallida, Bates, Trans. Ent. Soc. 1872, p. 183. 
Hab. Nitcaraaua, Chontales (Belt). 
CHONTALIA. 
Chontalia, Bates, Trans. Ent. Soc. 1872, p. 233. 
One species only of this pretty genus of the Lepturine group has yet been discovered. 
1. Chontalia cyanicollis. (Tab. V. fig. 3.) 
Chontalia cyanicollis, Bates, Trans. Ent. Soc. 1872, p. 2338. 
Hab. Nicaraava, Chontales (Belt). 
Only one example is at present known. 
