90 Annals of the Carnegie Museum. 



cc. Pronotum with the dorsum very greatly compressed, above angulato- 

 rounded, posteriorly truncate; first article of the posterior tarsi a little 



longer than the third Choriphyllum Serville. 



bb. Pronotum little or slightly compressed, very often depressed, or above not 



wholly foliaceous, or to a certain degree anteriorly compresso-produced. 



c. First and third joints of the hind tarsi subequal in length. Body nearly 



smooth; pronotum acute tectiform, in profile arcuate, posteriorly little 



depressed, the apex widely rounded Eleleus Bolivar. 



cc. First joint of the hind tarsi longer than the third. Pronotum nodulose, 

 middle distinctly depressed; the vertex strongly produced in advance 



of the eyes Cota Bolivar. 



A A. The frontal costa furcillate, but the rami diverging only gently forward, or 

 remaining parallel, very frequently separated only in a slight degree by a 

 sulcus. 

 b. Posterior angles of the lateral lobes of the pronotum but little produced out- 

 wards, obliquely truncate behind, very rarely acute spinose; first and 



third joints of the hind tarsi nearly equal in length Metrodorin/E. 



c. Vertex truncate, the middle rarely provided with a produced central tooth. 

 d. Vertex very narrow, about half the width of one of the eyes; posterior 

 angles of the lateral lobes of the pronotum flattened outwards, trian- 

 gularly produced, subspiniform or uncinate. . . .Plesioletlix Hancock. 

 dd. Vertex subequal to, or wider than, one of the eyes. 



e. Antennae inserted between the lower part of the eyes. Vertex not pro- 

 duced in advance of the eyes; the frontal costa roundly elevated 



between the antennae Cotys Bolivar. 



ee. Antennae situated below or rarely on a level with the inferior margin 



of the eyes. 



/. Body strongly depressed; anterior and middle femora expanded or 



clypeate, the carinae sinuato-lobate or foliaceo-laminate. 



g. Tegmina and wings wanting. Antennae inserted on a level with 



the lower margins of the eyes; first joint of the hind tarsi 



longer than the third Plalythorus Hancock. 



gg. Tegmina and wings present. 



h. Anterior femora clypeate. Lateral ocelli placed between the 

 inferior part of the eyes. Antennae shorter than the head 

 and inserted distinctly below the eyes. .Amorphopus Serville. 

 hh. Anterior femora not at all clypeate. Lateral ocelli placed 

 between the middle of the eyes. Antennae longer than the 

 head and inserted on a line with the inferior margin of the 



eyes Eomorphopiis Hancock. 



f. Body little depressed, or dorsum bearing gibbosities, or the median 

 carina of the pronotum more or less cristulate-undulate. 

 g. Posterior or lateral ocelli placed below the eyes . . Chiriquia Morse. 

 gg. Posterior or [lateral ocelli placed distinctly between the eyes, 

 h. Dorsum longitudinally compresso-elevated forward, flattened 

 posteriorly, rugose-reticulose, apex of process acute. Teg- 

 mina and wings wanting Platylettix Hancock. 



