NEKALSIA.— LEIOPTEKON. 75 



towards the apex ; the second is not much longer than broad, globular ; third one half 

 longer than fourth ; the third, fourth, and fifth somewhat cylindrical ; the rest to the 

 penultimate thicker and shorter in proportion to the breadth, and becoming gradually 

 shorter ; last conical at apex, nearly double the length of the twelfth. The head has 

 a few scattered hairs. Vertex thick, raised, rugose-punctured ; a furrow goes down 

 the side outside the ocelli ; the antennae originate from tubercles. Prothorax large, 

 smooth, shining ; a distinct ridge goes down from the top, and divides the front portion 

 (which slopes down from the ridge) from the larger posterior part, and a few rough 

 ridges run from it laterally on the upperside, from the mesonotum. The lateral sutures 

 on the mesonotum are wide and deep, but become obsolete towards the prothorax; 

 there is a short central one which is one half longer than wide ; its base is sharply 

 pointed ; the apex truncated. Close to the base of scutellum is a distinct, transverse 

 ridge from which the mesothoracic sutures originate ; on the other sides of this ridge 

 are the two large, oval, deep scuteliar fovese. The scutellum rises gradually from the 

 fovese with a slope ; the centre is hollow, the hollow being longer than broad ; on each 

 side of this central depression is a smaller and much narrower hollow ; the scutellum 

 ends in a short, stout spine, which projects backwards. The metanotum has a large 

 hollow field in the centre ; it is longer than broad in the centre, and is surrounded by 

 a straight channel behind and by a blunt ridge at the sides. Abdomen shorter than 

 the thorax ; pedicel short, raised, channelled, the edge margined ; second segment 

 scarcely half the length of the third, produced into a tongue-like process above ; the 

 third segment is a little longer than the fourth and following segments together. 

 Radial cellule wider than long. Posterior tibiae and metatarsi thick ; spurs nearly one 

 quarter of the length of the latter. 



LEIOPTERON. 



Leiopteron, Perty, Delect. Am. Art. (1830) . 



This genus is exclusively Neotropical. Eight species have been described from 

 Brazil. 



1. Leiopteron westwOOdii. (Tab. IV: fig. 12, $ ; 12 a, antenna.) 



Bufum ; capite thoraceque sat longe albido-villosis ; antennis (apice excepto), abdomine pedibusque posticis 



nigris, tarsis posticis rufo-testaceis ; alis hyalinis, macula magna ad apicem fumata. 

 Long. 6 millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



The antennae are distinctly clavate ; the third joint is shorter than the fourth. The 

 head and thorax coarsely rugose ; mesopleura smooth, almost impunctate, the upper 

 part depressed and separated from the lower by a curved groove ; this upper part is 

 finely punctured ; sternum coarsely punctured. The anterior coxae, trochanters, and the 



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