IOWA ACADEMY OF SCIENCES. 47 



HOMALODISCA TRIQUETRA FAB., Plate II, Fig. 1. 



p€icada triquHra Fab. Syst. Rhyngt.. p. 63. 1803. 



O TeUigonia vitripennis Germ. Mag. Ent. IV, p. 61, 1821. 



rj TeUigonia coagulataSzy. Insects, La., p. 13, 1832. 



fjTettigonia ichfhyocephala Si?n An, Soc. Ent. Fr., p. 494, 1854. (vide Fowl). 



(jProconia ndmitt ens \^a.\k. Homop. Supp.,p. 227 1858. 



QPi-oconia aurigeraV^^AXk. Homop. Supp., p- 228, 1858. 



•(^I'hera vitirpennis Fowl. Bio. Homop. H, p 221, Plate XIV. Figure i, 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- 

 nolum; 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 tibia?, 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 prninose 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 tibia3, mottled on all the femora, 

 and spots from which the spines on hind tibias 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 vUrijjeiDiis and does 

 not include triquetra at all. He evidently had our species 



