CICADELLINAE : PART I. PROCONIINI 151 



margin, without distinct median longitudinal fovea, antennal ledge in 

 lateral aspect longitudinally sulcate and carinate dorsally, clypeus 

 flattened on disc. Pronotum rugose and punctate. Forewing without 

 a membrane. Posterior femoral setal formula 2:1:0. Otlier anatomical 

 characters as in generic description. Color inostly brown, crown of 

 head yellow except for two angular areas on posterior portion ex- 

 tending from sutures posteriorly to posterior margin, pronotum 

 castaneous, except for broad marginal area behind anterior margin, 

 forewings very dark brown, almost black except basally, upper two- 

 thirds of clypeus dull yellow. 



Holotype male, Barro Colorado Island, Panama C.Z., Nov. 22-24, 

 1944 (R. H. Arnett, Jr.), at light (USNM); and a series of 23 speci- 

 mens of both sexes, Gatun, C.Z., September and March, and Barro 

 Colorado Island, July (CAS). 



A. arnetti, new species difTers from most of the others in the genus in 

 its lack of a longitudinal coronal fovea, the posterior femoral setal for- 

 mula, the lack of an M -shaped elevation on the posterior portion of the 

 crown, and in the flattened clypeus, which is usually depressed in other 

 species of Abana. 



33. DESELVANA, »ew genus 



Figures 140-146 



Type-species: Proconia excavata Le Peletier and Serville. 



Length 12-21 mm. 



Head strongly produced, median length greater than interocular 

 width, apex slightly elevated and carinate at transition from crown to 

 face, ocelli located on a line between anterior angles of eyes, with or 

 without a median M -shaped elevation bordering posterior margin, 

 with a median longitudinal fovea which is expanded apically or not, 

 without a longitudinal carina laterad of each ocellus, disc with or 

 without microsetae; antennal ledges in lateral aspect with or without a 

 longitudinal concavity, anterior margin declivous; clypeus flattened 

 medially, usually depressed beneath apex, muscle impressions distinct; 

 face usually pubescent beneath; clypellus not produced, its contour 

 continuing profile of clypeus. 



Thorax with pronotal width variable, less or greater than transocular 

 width of head, lateral margins varying from nearly parallel to con- 

 vergent anteriorly, disc punctate (sometimes rugose also), with or 

 without pubescence, posterior margin concave, in lateral aspect with a 

 complete dorsopleural carina which is arched ventrally at middle; 

 scuteilum transversely striate in posterior portion. Forewing with 

 membrane of variable extent, often not sharply differentiated from 



