1885.] E. T. AiVmBon— Notes on Luliav "R.liyncliotn.. 97 



Genus Tettigonia, H. Gcoffroy (in part). 

 Hist. Ins. p. 429 (1764) : Signoret, A. S. E. F. (2 scr.) i. p. 13 (1852). 



Signoret (in I. sujjra c.) reviews the history of the group, first esta- 

 bh'shed by Geoffrey, in his work describing the insects found in the neigh- 

 bourhood of Paris, under the name Tettigonia. In 1794, Fabricius sepa- 

 rated the same group in his Ent. Syst. (iv. p. 27) under the name Cicada, 

 and in his Syst. Rhyn. (1803) formed from it the genera Jassios, Flata, 

 and Cixius. In 1811, Latreille re-established Tettigonia, and, in 1821, 

 (Mag. Ent. iv.) Germar reduced it by creating the genera Gyjoona, 

 Coilidea, and others. In 1825, Lepelletier de St. Fargeau and Audinet- 

 Serville (Enc. Meth. x. p. 600) formed two divisions, Tettigonia for those 

 in which the head is rounded beyond the eyes and Proconia for those in 

 which the head is conical. In 1829, Latreille (Regno Anim. 2nd ed., 

 ii, 221) separated Ciccus from Froconia, and, in 1832, De Laporte de 

 Castelneau (A. S. B. F. i, p. 222) formed Germaria and lihajjhidorJmiios. 

 In 1835, Burmeister (Handb. ii, (i) p. 117) restored the Tettigonia of 

 Latreille and Germar with four subdivisions, and, again in 1840, Blan- 

 chard (Hist. Nat. Ins. iii) admits divisions only. In 1843, Amyot and 

 Serville (Hist. N"at. Ins. Hem. p. 569) admit Tettigonia, Germaria, Ciccus, 

 Rhaphidorhinus, and Proconia, and add Aulacizes, Piestostemma, and 

 Acojosis. In 1850, Spinola (Tav. Sin. Modena) created Piedroceijhala 

 and Wolfella, and, in the same year, Signoret created Pilohopterus (Rev. 

 Zool. (2 ser.) ii, p. 284). In 1851, Fitch formed Uelochara for an 

 American species, and, in the same year. Walker created Propetes. 



In 1852-54, Signoret (A. S. E. F. (3 ser.) i-iii.) keeps one genus 

 and five groups, and notices some 396 species then recorded from all parts 

 of the world. Stal, in 1869 (Hem. Fabr. ii, p. 59, note), includes the 

 group in his subfamily Jassida and division Proconiida, preserving Ger- 

 maria, Ciccus, Biestostemma, Rhapliidorliinus, Proconia, and Tettigonia 

 and adding a number of his own genera. In 1870, Stal (Ofvers. K. V.- 

 A. Forh. p. 733) raises the group to the dignity of a subfamily under 

 the name Proconiina. In 1884, Taschenberg (Zeitsch. Nat. Wiss. Halle, 

 p. 431) sinks the genera and reviews the whole as one genus with sub- 

 divisions running so closely the one into the other as not to afford good 

 generic characters. After examining the figures given by Signoret, this 

 appears to me to be the most reasonable solution of the difficulties coit- 

 nected with the arrangement of the insects belonging to this group, 

 which now number nearly five hundred. 



35. Tettigonia semicircularis, Signoret. 



Tettigonia semicircularis, Signoret, A. S. E. F. (3 ser.) i, p. 348, t. 10, f . 5 (1853) 

 Walker, List B. M. Suppt. p. 219 (1858). 



