80 THE UNIVERSITY SCIENCE BULLETIN. 



Homalodisca triquetra (Fabr.). 



(PI. 6, figs. 4-6.) 



Cicada triquetra Fabr., Syst. Rhyng., p. 63, 1803. 

 Tettigonia vitripennis Germ., Mag. d. Ent., iv, p. 61, 1821. 

 Tettigonia coagulata Say, Insects of La., p. 13, 1832. 



Tettigonia ichthyocephala Sign., Ann. Soc. Ent. Fr., Ser. 3, iii, p. 494, 1854. 

 Tettigonia triquetra Sign., Ann. Soc. Ent. Fr., Ser. 3, iii, p. 240, 1855. 

 Ciccus triquetra Walk., List Homop., Suppl., p. 243, 1858. 

 Proconia admittens Walk., List Homop., Suppl., p. 227, 1858. 

 Proconia aurigena Walk., List Homop., Suppl., p. 228, 1858. 

 Proconia excludens Walk., Ins. Saund., Homop., p. 98, 1858. 

 Homalodisca triquetra Stal, Hemip. Fabr., ii, p. 64, 1869. 



Homalodisca triquetra Fowl., Biol. Centr. Am., Homop., ii, p. 221, pi. 14, fig. 1, 1899. 

 Homalodisca triquetra Ball, Proc. la. Acad. Sci., viii, p. 47, pi. 2, fig. 1, 1901. 

 Homalodisca triquetra DeL., Tenn. St. Bd. Ent., Bui. 17, p. 19, 1916. 

 Homalodisca triquetra Van D., Cat. Hemip. N. A., p. 594, 1917. 

 Homalodisca triquetra Ols., Bui. Am. Mus. Nat. Hist., xxxviii, p. 2, 1918. 

 Homalodisca triquetra Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 30, 1919. 



Form: A long narrow species. Length, 13 mm. Vertex as long as 

 basal width, apex bluntly rounding, with longitudinal median depression. 

 Pronotum very coarsely pitted, short, anterior and posterior margins 

 about parallel. Elytra long and narrow, hyaline, venation prominent. 



Color: Brownish, with vertex, prcnotum and scutellum irrorate with 

 yellow. Elytra smoky, especially apically, with an opaque red spot of 

 varying size on costal margin of the apical cells. 



External genitalia : Female, last ventral segment very large and long, 

 slightly narrowing to acute lateral angles between which the posterior 

 margin is broadly incised to fully one-third its depth by a triangular, 

 obtusely pointed and sinuately margined incision; pygofers broadest at 

 their middle, and slightly exceeded by tip of ovipositor. Male, plates to- 

 gether forming a triangle wider than long, tips very acute; pygofers 

 short but very broad, narrowed at base, slightly widening posteriorly, 

 and covered with long fine hairs, with a short blunt chitinous process im- 

 bedded in side of each. 



Male internal genitalia: Styles very small for such a large form, 

 broadest at base and tapering sinuately to blunt apex, apical half much 

 roughened with fine teeth; connective very short, consisting of a trans- 

 verse band widest at the middle, especially posteriorly; cedagus very 

 large and peculiar, body with a long anteriorly and vertically directed 

 process to meet the connective which extends ventrad from the styles, 

 with a stout dorsal process and two pairs of terminal processes, an outer 

 short and blunt process and an inner large, sharply pointed process. 



Distribution: A southern species not yet reported from Kan- 

 sas. It may occur in the southern portions of the state. 

 Hosts: Unknown. 



