CICADELLINAE: PART 2. NEW WORLD CICADELLINI 823 
Isogonalia conflicta, NEW SPECIES 
FIGURE 665, PAGE 824 
Length of male 4.0 mm, of female 4.8-4.9 mm. Head with median length of 
crown varying from three-fourths to more than eight-tenths interocular width 
and from slightly less than one-half to six-tenths transocular width; ocelli 
located on a line between anterior eye angles and each closer to median line 
of crown than to adjacent anterior eye angle; clypeus with muscle impres- 
sions not distinct; forewing with membrane including inner apical cell and 
apical portions of remaining cells, veins distinct; hindleg with length of first 
tarsomere greater than combined length of two more distal tarsomeres. Male 
with pygofer subangulate at apex; plates extending posteriorly as far as 
pygofer apex; style with a lateral lobe near midlength of shank; aedeagal shaft 
not very broad, with a pair of short tapering processes arising near its base, 
extending almost parallel to shaft and slightly divergent from each other, not 
attaining shaft apex; paraphyses absent. Female genitalia as in generic 
description and very close to the illustration of Amphigonalia severini (DeLong) 
(fig. 670). 
Ground color of crown, anterior portion of pronotum and all of scutellum 
greenish-yellow, with a dot at apex of crown, and a pair of oblique capitate 
markings on disk, black, often with two pairs of weak linear discal markings 
parallel to median line, black; scutellum often with two or four small weak 
black markings; posterior portion of pronotum and forewings deeper green, of- 
ten with a blue vitta in brachial cell. Face, propleura and legs yellow, with a 
black spot below dorsopleural carina; male plates black apically. 
Holotype and two additional males and one female, Vera Cruz, V. C.,, 
Mexico, July 1959 (N. L. H. Krauss); two females same locality, December 
1959 (N. L. H. Krauss) on Pluchea odorata Cassini; six males and three 
females, Boca del Rio, V. C., Mexico, November, 1960 (N. L. H. Krauss); 
one male and one female, Tamazunchale, Mexico, August 13, 1936 (E. D. 
Ball); one female, Baking Pot, British Honduras, August, 1953 (N. L. H. 
Krauss); one female, El Cayu, British Honduras, 6298, September, 1959, 
23507, on leaves of P. odorata (N. L. H. Krauss); one female, Tegucigalpa, 
Honduras, March 30, 1917 (F. J. Dyer) (all USNM). 
I. conflicta, n. sp., differs markedly from other species in the genus in the 
color pattern which will serve to separate it readily. The aedeagal processes 
are also distinctive. 
Isogonalia labyrinthica, NEW SPECIES 
FIGURE 664, PAGE 824 
Length of male 6.3-6.5 mm, of female 7.2 mm. Head with median length of 
crown varying from two-thirds to three-fourths interocular width and from 
slightly more than four-tenths to slightly less than one-half transocular width; 
ocelli located on a line between anterior eye angles, each closer to median line 
of crown than to adjacent anterior eye angle; clypeus with muscle impres- 
sions not very distinct. Forewing with membrane including only inner portion 
