IOWA ACADEMY OF SCIENCES. 
47 
HOMALODISCA TRIQUETRA FAB., Plate II, Pig. 1. 
- Cicada triquetra Fab. Syst. Rhyngt., p. 63. 1803. 
Tettigonia vitripennis Germ. Mag. Ent. IV, p. 61, 1821. 
Tettigonia coagulataSay. Insects, La., p. 13, 1832. 
Tettigonia ichthyocephata Sign. An. Soc. Ent. Fr., p. 494,1854. (vide Fowl). 
Proconia admittens Walk. Homop. Supp. , p. 227 1858. 
Proconia aurigera Walk. Homop. Supp. , p‘ 228, 1858. 
Phera vitirpennis Fowl. Bio. Homop. II, p 221, Plate XIV. Figure 1, 1899. 
Longer and narrower than in the former genera, with a broad, 
triangular head, which is rounded at the apex. Elytra, hyaline. 
Length, 13 mm.; width, nearly 3 mm. 
Vertex, as long as its basal width, one-fifth longer than pro- 
notum; disc, flat, sloping, with a median furrow and a depression 
before each ocellus, apex very bluntly rounding, the lateral mar- 
gins sharp. Front, sloping, disc concave, rounding up to meet the 
vertex in a right angle. Pronotum, very coarsely pitted, anterior 
and posterior margins nearly parallel. Elytra, with the venation 
strong, usually two or three irregular cross-nervures between the 
sectors at or before the first fork, the claval veins coalescing for a 
short distance, then widely separated. Anterior tibise, sulcate 
above and somewhat widened apically. 
Color; vertex and pronotum deep testaceous brown, finely and 
regularly irrorate with yellow sometimes obscuring the brown. 
Elytra smoky subhyaline usually a broad, somewhat milky band, 
before the middle and an opaque red spot before the apical cells 
which sometimes extends forward along the costa. Fresh speci- 
mens often have a pruinose spot just before the red one. Face and 
thorax below orange yellow, a spot on clypeus, sometimes a pair on 
face, the upper side of anterior tibiae, mottled on all the femora, 
and spots from which the spines on hind tibiae arise, black. Abdo- 
men blue-black above, the lateral margins, broadly on the two basal 
segments, narrowly beyond, ivory white, the spiracles and a few 
spots along margin brown. The pygofers orange, abdomen below 
whitish, the disc of each segment black. 
Genitalia; female segment about twice the length of the preced- 
ing, slightly narrowing to the lateral angles which are acute, 
between these the posterior margin is triangularly incised one-third 
its depth, the apex of the incision is blunt and the margins sinuate. 
Male plates long, triangular, slightly, concavely narrowing to an 
acute apex. 
Specimens are at hand from Georgia, Florida, Alabama, 
Louisiana, Mississippi, Texas, and Mexico, and it has been 
reported from South Carolina. It seems probable that the 
references of this species to California belong to the fol- 
lowing species. 
The above synonomy is given with some hesitation. 
Fowler figures it under the name of vitripennis and does 
not include triquetra at all. He evidently had our species 
