448 Mr. J. S. Baly's descriptions of 



externo vittaqne ;iii,t,aista discoidali, a l)asi ad apicem extensa, flavis, 

 Loug. 3i lin. 



Hah. Ecuador, Peru. 



Antennge filiform, the third joint more than twice the length of 

 the second, the three lower ones piceous, the rest black. Thorax 

 nearly one-half broader than long; sides nearly parallel and 

 sinuate from the base to beyond the middle, thence slightly con- 

 verging towards the apex ; upper surface smooth, deeply impressed 

 with two large fovea;. Elytra oblong-ovate, slightly dilated pos- 

 teriorly; upper surface sculptured as in D. Fainnairci, but the third 

 costa from the suture is narrower and scarcely broader than the 

 others ; piceous, subopaque, each elytron with the outer limb and 

 a narrow vitta covering this third costa, flavous. 



From D. Fairmairei, the only insect with which the 

 above species can be confounded, it is separated by the 

 black head, and by the narrower third costa on the 

 elytron. 



Diahrotica cornuta. 



Subelongata, nigra, nitida, pedibus capiteque fulvis, antennarum 

 articulis intermediis ultimoque nigris ; thorace lateribus angulatis, 

 disco distincte punctato, profunde bifoveolato ; elytris anguste 

 oblongis, regulariter elevato-vittatis, vitta tertia a sutura latiori, 

 interspatiis biseriato-punetatis ; utrisque basi, limbo externo vitta- 

 que discoidali, a basi ad apicem extensa, flavis. Long. 2^ — 3 lin. 



Mas. — Clypei margine antico in cornu obtuse utrinque pro- 

 ducto labro ampliato. 



FcEM. — Clypeo non producto, facie inferior! nigra. 



Hab. Peru, Guatemala, Mexico, Vera Cruz. 



Anteunaj filiform, the third joint twice the length of the second, 

 the intermediate joints, together with the apical one, black. Thorax 

 broader than long ; sides distinctly angulate ; disk shining, finely 

 but not closely punctured, medial disk impressed with two large 

 fovea', the space between them depressed. Elytra sculptured as in 

 D. Vairmalrci. 



Any difference in the form and sculpture of the lower 

 face in the two sexes is rare in the vittate section of the 

 genus ; the above is the only instance known to me of 

 its occurrence. 



