IOWA ACADEMY OF SCIENCES. 41 



Size and structure of ty\)ic^\ 'irro rata. 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 

 ]/ ■poUi)iosa 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 }-ufiventris (which both recognize as a syno- 

 nym) from Florida. 



GENUS^ONCOMETOPIA STAL. 

 Head broader thao 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 tibias 

 slightly sulcate above. 



KEY TO THE SPECIES. 



A. Front 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 18mm undata Fab. '^ 



AA. Front retreating from a point on a line with vertex and pro- 

 notum. Costal area broad, tirst sector forked before the first 

 cross nervure. Size, small, 9mm or less lateralis FabQ 



<^ Oncometopia undata Fab., Plate I, Fig. 2. 



Cicada undata, Fab. Ent. Syst. IV., p. 32, 1794. 

 t) Cicada orbona. Fab. Ent. Syst. Supp., p. 520, 1798. 

 Q I 'roconia nigricans. Walk. Homop. III., p. 783, 1851. 

 n Proconia clarior. Walk. Homop. III., p. 784, 1851. 

 (iProconia lucerne. Walk. Homo. III. , p. 785, 1851. 

 G Proconia marginata, Walk. Homop. III., 785, 1851. 

 O Proconia badia. Walk Homop. III., p. 786, 1851. 



§ Proconia scutellata. Walk. Homop. HI., 786. 1851. 

 Preeonintenebrosa, Walk. Homop. III., p. 787, i85[. 

 O Proconia iilagiata. Walk. Homop. HI., p. 788, 1851. 



Oncometopia undala. Fowl. Bio. Homop. II., p. 231, pi. xiv, figs. 19 and 20. 

 OOncometopia alpha, Fowl. Bio. Homop. II., p. 232, pi. xiv, fig. 22. 



