Cyptocephala cogitabunda Berg

Cyptocephala cogitabunda Berg Figs. 2, 9

Cyptocephala cogitabunda Berg, 1883:210 - 211 ; Berg, 1884:26 - 27 (reprint of Berg, 1883); Berg, 1891:282 - 283; Rolston and McDonald, 1984: 77, fig.38.

Thyanta elegantula Jensen-Haarup, 1928:186 , 188, 191. New Synonymy.

Cyptocephala elegantula: Rolston and McDonald, 1984:77 .

Diagnosis. Extremely variable in color and markings, ranging in predominant color from dark brown to dark green. Scutellum usually with pale mesial band beginning most often caudad of basal disc and continuing to apex, this band often bordered subapicallly with elongated patch of dark castaneus to fuscous punctures. Pale, trans humeral band often present, limited posteriorly by narrow, irregular callus; latter sometimes bordered posteriorly by narrow band of rufous to fuscous punctures. Exocoria often pale, at least basally.

Juga projecting slightly beyond tylus, causing shallow emargination in apex of head, their lateral margins briefly parallel or subparallel before rather shallow an terocular concavity. Anterolateral margins of pronotum concave, somewhat reflexed at humeri. Humeri subangular, projecting laterad of corresponding corium by 0.4 0.8 width of eye. Scutellar width at end of frena 0.38 - 0.44 basal width. Pleura uncalloused. Size extremely variable, 4.8 - 7.7 mm long excluding hemelytral mem branes.

Carina on each side of genital cup mostly visible entad of parameres ( Fig. 2). Lateral lobe of parameres narrow; anterior lobe wider, usually moderately rounded apically, sometimes irregular from denticulation ( Figs. 2, 9).

Distribution. Argentina (Buenos Aires, Catamarca, Cordoba, Mendoza, San Luis, Tucumfan); Bolivia (La Paz); Uruguay (Colonia). The northern range is considerably greater if a specimen purportedly from Lima, Peru, is correctly labeled.

Types. Dr. Jocelia Grazia compared a female specimen sent to herwith the holotype of C. cogitabunda , a female, and judged the two specimens to be conspecific. The holotype Thyanta elegantula , a male, was examined.

Comments. C. cogitabunda is the only species in the genus in which the juga are longer than the tylus, thus creating a shallow emargination in the apex of the head. It is also the only one with distinctly concave anterolateral pronotal margins; in the other species these margins are weakly concave or straight.