IOWA ACADEMY OF SCIENCES. 
41 
Size and structure of typical irrorata. Color, orange 
fulvous, claval areas greenish white, entire upper surface 
finely irrorate with black. 
This is an extreme form of the enlargement of the light 
spots combined with a change in their color. Specimens 
are at hand from Florida and Fowler describes it from 
Mexico. 
From Signoret’s description there seems to be little 
doubt but that this is the species that he had in hand and 
which he said was “common in Brazil.” Fowler, however, 
with “a typical example of Signoret,” at hand separated 
pollinosa as distinct from the Brazilian form. If this 
should prove true, which I doubt, still the name irrorata 
would stand for our form as it was described from Carolina 
and Walker’s rufiventris (which both recognize as a syno- 
nym) from Florida. 
GENUS ONCOMETOPIA STAL. 
Head broader than pronotum; vertex obtuse, rounding, disc con- 
vex confused with front, a distinct ledge over antennal sockets; 
eyes prominent; front gibbous, clypeus scarcely angled. Pronotum 
short, broadly rounding in front, posterior margin concave, very 
nearly parallel with the anterior, lateral margins straight, subpar- 
allel or slightly narrowed behind. Elytra narrow, margins sub- 
parallel, the lateral margins of abdomen exposed. Anterior tibise 
slightly sulcate above. 
KEY TO THE SPECIES. 
A. Eront extending fartherest anteriorly at about the middle, 
much below the level of vertex and pronotum. Costal area 
narrow, the cross nervure some distance in front of the fork 
of first sector. Length 13mm undata Fab. 
AA. Front retreating from a point on a lme with vertex and pro- 
notum. Costal area broad, first sector forked before the first 
cross nervure. Size, small, 9mm or less lateralis Fab. 
Oncometopia undata Fab., Plate I, Fig. 2. 
Cicada undata, Fab. Ent. Syst. IV., p. 32, 1794. 
Cicada orbona, Fab. Ent. Syst. Supp., p. 520, 1798. 
Proconia nigricans, Walk. Homop. III., p. 783, 1851. 
Proconia clarior, Walk. Homop. III., p. 784, 1851. 
Proconia lucerne, Walk. Homo. III. , p. 785, 1851. 
Proconia marginata, Walk. Homop. III., 785, 1851. 
Proconia badia, Walk Homop. III. , p. 786, 1851. 
Proconia scutellata, Walk. Homop. III., 786, 1851. 
Preconia tenebrosa, Walk. Homop. III., p. 787, 1851. 
Proconia plagiata, Walk. Homop. III., p. 788, 1851. 
Oncometopia undala, Fowl. Bio. Homop. II., p. 231, pi. xiv, figs. 19 and 20. 
Oncometopia alpha, Fowl. Bio. Homop. II., p. 232, pi. xiv, fig. 22. 
