346 N. C. AGR. EXP. STA. BUL. 239 
Holotype and four topotypic males, Santo Domingo, Ecuador, November 6, 
1953 (H. Yust), collected at lights; and one male, same locality, February 6, 
1958 (R. Hodges), (USNM). 
This species is named in honor of Harold R. Yust, who has collected many 
interesting neotropical leafhoppers. 
L. yusti, n. sp., differs from all other species in the genus in its unpaired 
paraphyses and in the peculiar shape of the apical pygofer margin of the 
male. 
Ladoffa donsana, NEW SPECIES 
FIGURE 277, PAGE 347 
Length of male 6.9-7.0 mm. Head with median length of crown from slight- 
ly more than seven-tenths to almost nine-tenths interocular width and from 
slightly less than one-half to slightly greater than one-half transocular width, 
muscle impressions distinct or not. Male pygofer moderately produced, 
macrosetae as in L. yusti, n. sp., with a heavily sclerotized apical process aris- 
ing on dorsal margin, extending ventrally along posterior margin, then mesad, 
in ventral view slender and acute, not reaching median line, pygofer with a 
second short, membranous, apicoventral conical structure; plates not ex- 
tending posteriorly as far as pygofer apex; style and aedeagus as in yustz, 
paraphyses long-stalked with short rami. 
Holotype: Ground color of crown black, a pair of longitudinal markings be- 
tween ocelli and anterolateral margins, red, with an apical small yellow spot; 
pronotum as in yusti; scutellum with median red spot extending forward to 
anterior scutellar margin but broader in posterior half; forewing much as in 
yustt except that middle spot of clavus is interrupted on claval suture and ex- 
cept that posterior two red spots merge; face, thoracic pleura, and legs, pale 
yellow. In the two topotypes the colors are faded, but the middle claval spot is 
as in yustt, not interrupted. In the specimen from Balzapamba, Ecuador, the 
middle of the costal spots is interrupted. 
Holotype and two additional males, Turrialba, Costa Rica, March 13-17, 
1965 (S. S. and W. D. Duckworth); one male, Balzapamba, Ecuador, March 
7, 1938 (W. Clark-Macintyre) (USNM). 
L. donsana, n. sp., is very close to yusti, n. sp., differing in the shorter male 
plates, the branched paraphyses and in that the posteroventral pygofer margin 
is membranous (sclerotized in yustz). 
Ladoffa insperata, NEW SPECIES 
FIGURE 278, PAGE 347 
Length of male 6.4 mm. Head with median length of crown from more than 
nine-tenths of to equal to interocular width; clypeus convex medially, muscle 
impressions distinct. Male pygofer well produced, apical margin regularly 
convex, without processes, with few sparse macrosetae arranged in an oblique 
group on posterior half of disk; plates not extending posteriorly nearly as far 
