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Show 42 INSECTA. . 'bly shoJ•ter in •I ts ml. dd 1e t h an the mesothorax, com pose the 1s sens1 subgenus P a::OILOP'I.E RA ' Lat' Germ.-Flata, Fa b.( 1) , th mesothorax, and where Those, in which it is atjleast as lonbgdas e or shorter are dilated l 1 than the a omen, ' the elytra, hard y onger d f rm another subgenus, the at their base, and afterwards narrowe ' o Issus, Fab.(2) Sometimes the antenn::e are at least as 1~ ng .as the heade , easn. d most frequently inserted into an inferior emargmatlOn of the y ANoTIA, Kirb., Which in a natural order comes near his Otiocerus, and approximates to Issus in the insertion of the antenn::e(3). AsiRAoA, Lat.-Delphax, Fab. Where the antennre are m. serte d ·m to an 1· 0 te n·o r emargination o. f the eyes are as long as the head and thorax united, and have thelr first joi~t usually longer than the second, compressed and angular. There are no simple eyes( 4). DELPHAx, Fab. Where the antenn::e are inserted in a similar manner, but are never much longer than the head; the first joint is much shorter than the following one and without ridges. The simple eyes are apparent( 5). DERBE, J!ab. These Insects are unknown to me; I presume, howeve~·, t.hat the.y approach those of the preceding subgenera, that of Anotla 10 partl· cular. (1) Lat., lb., p. 165;-Germ., Magas. der Entom., III, p. 219; IV, P· 103, 104. (2) Lat .. lb., p. 166; Fab ., Syst. Ryng., p. 199. . • , (3) Lin. Trans., XIII, pl. i, fig. 9, 10, 11, 15. (4) Lat., lb., p. 167. (5) Lat., Gen. Crust. et Insect .• III, p. 168. HEMIPTERA. 43 In the last of the Cicadari::e, the antet1n::e are inserted between the eyes; they compose the genus CICADELLA.-Cicada ranatra, Lin. Which may be thus subdivided: We will begin with those species, the Ledr::e excepted, which formerly composed the genus MEMBRAOIS of Fabricius. Their head is strongly inclined or lowered anteriorly, and prolonged into an obtuse point, or in the form of a clypeus, more or less semicircular. The antenn::e are always very small, terminated by an articulated seta, and inserted into a cavity under the margin of the head. The prothorax is sometimes dilated and hol'Oed on each side, prolonged and narrowed posteriorly into a point or spine, either simple or com· pound, sometimes elevated longitudinally along the back, compressed into a kind of edge or crest, and sometimes projecting and pointed anteriorly; the legs are scarcely spinous. Some have no apparent or exposed scutellum, properly so called. Here, the tibi::c, the anterior ones particularly, are strongly compressed and foliaceous. The top of the head always forms a sort of semicircular clypeus. MEMDRAoxs, Fab. Where the prothorax is elevated, compressed and foliaceous along the middle of the back( 1 ). TRAGOPA, Lat. Where that part of the body presents, on each side, a horn or pointed projection without any intermediate elevation, and is prolonged posteriorly into an arched point of the length of the abdomen, and replacing the scutellum(2). There, the tibi::e at·e of the ordinary form or non-foliaceous . . DARNis, Fab. Where the posterior prolongation of the prothorax covers the top (1) The Membracis foliaceu8, Fab. (2) Membraces ft•om the Brazils, which appear to me to be analogoua to the following •pecies of Germar, glalwa, albimacula and xanthocephala. I |