CICADELLINAE: PART 2. NEW WORLD CICADELLINI 601 
Plesiommata corniculata, NEW SPECIES 
FicurE 488, pace 598 
Length of male 3.6-4.1 mm, of female 4.0-4.9 mm. Head with median 
length of crown from slightly more than one-half to almost eight-tenths intero- 
cular width and from slightly less than one-third to four-tenths transocular 
width, apex of crown broadly rounded in dorsal view, ocelli in line with an- 
terior eye angles. Male genitalia with plates gradually tapered in basal half, 
very slender in apical half; aedeagus in lateral view abruptly expanded at 
apex, in ventral view shaft in shape of a simple horn. 
Color of dorsum dull pale stramineous, a narrow rim around each ocellus, a 
diamond-shaped median more anterior spot on crown, and the apex, black; 
pronotum with two transverse pale brown stripes, forewings with longitudinal 
veins brown; face irregularly marked with light brown and dull white. 
Holotype male and a long series of specimens of both sexes, Rio 
““Caraguata’’, Mato Grosso, Brazil, March, 1953 (F. Plaumann) (NCS). A 
long series of specimens of both sexes from the following localities: Cojimies, 
Manabi, Ecuador, August, 1949 (W. Clark-Macintyre), on sweet potato; San 
Isidro del General, Costa Rica (D. L. Bounds); Cuernavaca, Morelos, Mex- 
ico, August 6, 1938 (L. J. Lipovsky) (NCS). Dutch Guiana, August, 1953 (J. 
M. B. van Dinther) (AMNH). Puerto Armuelles, Panama, December 4, 1939 
(T. T. Howard); Gamboa, Panama C. Z., February 14, 1921, February 16, 
1921 (J. G. Sanders); Alhajuela, Panama C. Z., February 11, 1921 (J. G. 
Sanders); Piracicaba, Sado Paulo, Brazil, September 6, 1964 (collector un- 
known), November 15, 1965 and December 26, 1964 (C. A. Triplehorn); 
“Guajara” Mirim, ‘Bolivia’, February 13, 1943 (OSU). Tingo Maria, Peru, 
June 17, July 3, and July 6 (W. T. Van Velzen); from a number of Panama 
localities (F. S. Blanton) (USNM). Estancia Postill6n, Puerto Max, Rio 
Paraguay, N. Paraguay; Paramaribo, September, 1961 (J. Michaelis) 
(ZIMH). Monsén Valley, Peru, September 18, 1954 (E. I. Schlinger and E. S. 
Ross); Buenaventura, Colombia, August 31, 1954 (E. S. Ross) and November 
2, 1950 (collector unknown) (CAS). Mount Gay Estate, British West Indies 
(H. H. Smith) (BM). Santa Cruz, Bolivia (J. Steinbach) Cumuto, Arepo, 
Trinidad, from Savanna, April, 1913 (R. Thaxter) (MCZ). Limon Province, 
Costa Rica (R. E. Woodruff) (FSPB). Aracataca, Colombia, February 12 
(Ujhely) (HNHM). Holotype on indefinite loan to USNM. 
P. corniculata, n. sp., is readily separable from all other species of the genus 
by the distinctive form of the aedeagus. 
81. Genus HELOCHARA FitrcH 
FicurE 493 
Helochara Fitch, 1851a:56. Type-species: Helochara communis Fitch, by monotypy. 
Length of male 4.2-5.3 mm, of female 5.8-6.3 mm. 
Crown, pronotum, scutellum, forewing to membrane, face, and thoracic 
pleura coarsely pitted. Head moderately triangularly produced, median length 
