CICADELLINAE: PART 2. NEW WORLD CICADELLINI 417 
closer to former, crown without a well defined transverse concavity; clypeus 
with muscle impressions usually distinct, or distinct on dorsal portion of 
clypeus only. Forewing with base of middle anteapical cell occurring more 
basally than base of inner anteapical cell and more basally than apex of 
clavus, base of outer anteapical cell approximately opposite base of middle 
anteapical cell. Male pygofer narrowed posteriorly and acute at apex, with 
numerous large macrosetae on most of surface except basally and _basi- 
dorsally, dorsal pygofer margin with a short, narrow lobe near its midlength; 
plates narrow throughout their apical halves; aedeagus with a pair of slender 
symmetrical ventral processes arising from a common stalk on basal third of 
shaft, acute at their apices, without additional more apical aedeagal processes, 
with a slightly asymmetrical median short tapered acute process arising from 
dorsal portion of atrial rim of aedeagus; paraphyses absent. Female ab- 
dominal sternum VII without prominent lobes at midlength in lateral view. 
Color of crown, pronotum, and scutellum black; forewing either black with 
a yellowish costal area opposite outer anteapical cell and a small triangular 
hyaline spot extending from costal margin to base of outer apical cell (type), 
or, in addition, with two transverse narrow transcommissural ivory stripes on 
forewing, one slightly beyond apex of scutellum and tapering on each wing to 
terminate acutangularly without attaining the costal margin, and the other ex- 
tending from claval apex anterolaterally to costal margin slightly beyond mid- 
length of latter; face black except narrow marginal areas at apex of clypellus 
and genae, and in some specimens a few pale arcs near dorsal margin of cly- 
peus; thoracic pleura black; legs and beak pale yellow. 
Holotype male, Cundinamarca, Colombia, Rio Negro below Pacho, 
February 26, 1942 (Chapin No. 664) (USNM). Two males and three females, 
Batatal, Bolivar, Colombia, 1938-1939 (M. Althen-Dahl) (ZIL). Two males, 
Bogota, Colombia (Lindig.) (RMS). One male, Puerto Berrio, Colombia, Oc- 
tober, 1896 (Prof. O. Btirger) (ZIMH). One male and one female, same 
locality as preceding, August 5, 1958 (Henry Dybas) (Field Museum). In ad- 
dition, a male of which only the genitalia and a part of one forewing remain, 
from Porto Bello, Panama (CAS) appears to belong to this species. 
H. gracilis, n. sp., is similar in appearance to M. pudica (Fabricius), from 
which it differs in the smaller lobe on the dorsal pygofer margin, the atrial 
process and the stalked aedeagal processes in the male, in the lack of a lobe 
on the abdominal sternum VII of the-female, and in the black face in both 
sexes. It is also similar to M. plutoniella, n. sp., in the treatment of which dis- 
tinguishing characters are discussed. It is also close to M. sociata (Fowler) in 
the angulate dorsal pygofer lobe, and in some specimens of sociata an un- 
paired process of the dorsal apodemes occurs, but it differs from sociata in the 
characters used in the key. 
Microgoniella plutoniella, NEW SPECIES 
FIGURE 337, PAGE 418 
Length of male 5.4 mm. Head with median legnth of crown slightly less 
than six-tenths interocular width and slightly more than one-third trans- 
ocular width; ocelli located slightly behind a line between anterior eye angles, 
