DIABEOTICA. 559 



length of the second ; thorax twice as broad as long, reddish-fulvous, the surface with two deep impressions 

 and a few fine punctures • elytra convex and dilated posteriorly, pale flavous, with a short transverse depres- 

 sion before and another immediately below the middle, each with an elongate elevation near the suture 

 placed at a little distance from the apex, the entire disc covered with small piceous punctures ; underside 

 black, the legs flavous. 



Hab. Costa Rica (Van Patten), Volcan de Irazu (Rogers). 



In one specimen there is an elongate piceous spot placed at the side of the elytral 

 elevation ; the female is probably devoid of the latter. When seen with the naked eye 

 the elytra seem to be furnished with a narrow transverse raised band, on account of 

 the depression in front and below the middle. 



134. Diabrotica sobrina. 



Ovate, dilated posteriorly, black, the head and the apical four joints of the antenna? fulvous ; thorax transverse, 

 bifoveolate, fulvous ; elytra rather remotely punctured, fulvous, the apical margin black. 



Length 3|-4 lines. 



Head impunctate, rather broad, the labrum, mandibles, and palpi black; antennae not more than half the 

 length of the body, the third joint twice the length of the second and equal to the fourth joint, the apical 

 four joints fulvous, the others black, covered with yellow pubescence ; thorax twice as broad as long, the 

 surface nearly impunctate, with a small fovea on each side and a very indistinct one near the base ; elytra 

 strongly dilated posteriorly, broad, finely but not closely punctured, uniformly fulvous, shining, the 

 extreme apical margin black ; underside and legs black. 



Hab. Panama, Volcan de Chiriqui (Champion). 



135. Diabrotica dilatata. 



Broadly ovate, dilated, black ; thorax transverse, obsoletely depressed on each side ; elytra widened posteriorly, 

 fulvous or testaceous, finely and closely punctured. 



Length 2| lines. 



Head impunctate ; the frontal elevations broadly trigonate, distinctly raised ; clypeus with a distinct central 

 ridge ; antenna about two thirds the length of the body, black, the intermediate joints slightly widened 

 in the male, the third joint twice the length of the second but shorter than the fourth joint ; thorax more 

 than twice 'as broad as long, the sides very little rounded, the anterior angles somewhat thickened, the 

 surface obsoletely depressed on each side and across the disc, impunctate ; scutellum black ; elytra convex 

 and widened posteriorly, flavous or fulvous, their epipleuree rather broad anteriorly ; underside and the 

 legs black ; the posterior tibiae with a very small spine ; the first joint of the posterior tarsi as long as the 

 following three joints together; claws fulvous, bifid. 



Hab. Mexico, Cordova, Teapa, Jalapa (Huge), Toxpam, Tuxtla (Salle) ; Guatemala, 

 Purula, Sabo, Senahu, San Juan in Vera Paz (Champion)-, Costa Rica, Cache, Volcan 

 de Irazu (Rogers); Panama, Volcan de Chiriqui, Peiia Blanca (Champion). 



The short, posteriorly dilated shape, the transverse thorax, and the slightly dilated 

 antennae in the male, scarcely agree with Diabrotica ; nevertheless J), dilatata possesses 

 all the essential characters of that genus, and may be recognized by its shape and 

 coloration. Many specimens were obtained in Guatemala, two only in the State of 

 Panama. 



