CICADELLINAE: PART 2. NEW WORLD CICADELLINI 105 
nective Y- or T-shaped (nearly a transverse bar in D. gaudens (Walker)), with 
or without median keel. Aedeagus symmetrical or not, with or without 
processes, but processes usually not paired when present. Paraphyses present 
(exception: D. corixoides (Fowler)), paired or unpaired, symmetrical or not, 
somewhat variable in some species. 
Female (fig. 96) abdominal sternum VII with posterior margin varying 
interspecifically from broadly and very shallowly concave to well produced 
posteriorly. Ovipositor with second valvulae each expanded throughout length 
beyond basal curvature and bearing teeth on apical three-fourths of expanded 
portion, its ventral margin convex throughout expanded portion, primary 
teeth quadrate, sloping and bearing minute secondaries, with numerous ante- 
apical denticulations on dorsal and apicoventral margins, with an anteapical 
ventral angle. Pygofer produced and broadly rounded, with numerous macro- 
setae of varying size on apical one-half. 
The genus Dilobopterus Signoret occurs from Mexico and the West Indies 
through all of Central and South America to Argentina. Dzulobopterus is 
probably related to Amblyscartidia, new genus, in the discussion of which simi- 
larities and differences are discussed. It is much closer to Lissoscarta Stal in 
many respects, in both males and females, but it can be separated readily 
from Lissoscarta by the lack of a constriction at the base of the abdomen. 
Consistent characters have not been found to separate Pseudoscarta from 
Dilobopterus, although a number of species formerly included in each of these 
nominal genera can be relegated easily to one or the other, the larger, 
yellower species with a more produced head to Pseudoscarta, the shorter darker 
species with a more rounded head to Dilobopterus. But such a separation does 
not result in placing together all of the species with an axillary lobe in the 
hindwing, moreover syrphoidulus (Jacobi) and obliquatulus (Jacobi) are inter- 
mediate in appearance and in the former the females are golden while the 
males are dark. Separation of the two genera on the basis of the enlarged 
jugal lobes alone also seems to result in unnatural groups — for example 
hyalinatulus (Osborn) would be placed in Pseudoscarta, but the genitalia of this 
species are very close to those of selvanus, n. sp., which would have to be 
placed in Dzilobopterus. Signoret himself (1850b) recognized the difficulties 
presented by annectant forms. In speaking of his new species ¢trifasciatus, in the 
paper in which he described the genus Dilobopterus: ‘“The appendix [jugal 
lobe] is developed but not detached and this species would form the transition 
from this genus to Tettigonia ... .”’ [Young’s translation. ] 
Dilobopterus spectabilis (Distant) is placed in synonymy in the list below as a 
result of comparison of the accompanying illustration of the female lectotype 
of the Distant nominal species with specimens associated with males of D. 
auctulus (Jacobi) by the present author. 
The genitalia of the male lectotype of Tettigontella bracteatulus Jacobi are 
closely similar to the accompanying illustration. 
The present interpretation of Dilobopterus burmeisterr Signoret rests on the 
original description. This is the only species in which the female has an en- 
tirely yellow scutellum among those species considered by Signoret at the time 
of the original description. The only specimen in the Signoret collection in 
