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INSECTS OF SAMOA. 



Subfamily TIBICININAE Dist. 



Genus Baetueia Distant, 1892. 

 Type Cicada conviva Stal. 



3. Baeturia exhausta Guer. Figs. 5-9, 11-17, 19-21. 

 Distant, Syri. Cat. Horn. Cicad., p. 157, 1906. 



Cicada exhausta Guer., Voy. " Coquille," Zool., II, p. 181 (1838), pi. x, fig. 6 (1831). 

 C. hastipennis Walk., List Horn. Brit. Mus., SuppL, p. 30, 1858. 

 Dunduhia parabola Walk., Ins. Saitnd. Horn., p. 6, 1858. 



Savaii : Safune, up to 4,000 feet in rain forest, 4 (^(^, 1 $, 2 exuviae, v. and 

 xi. (Buxton, Hopkins, Bryan). 



Upolu : Apia, Malololelei, Aleipata, Vaea, up to 2,000 feet, 14 (^(^, 25 

 3 exuviae, every month except i. and x. (various collectors). 



Tutuila : Pago Pago, Fagatoga, Amauli, 8 ,^q, 11 ii., iii., ix. (Steffany, 

 Judd, Swezey, Wilder). 



Manua : Ofu, Tau, 3 (^(^, ii. (Judd). 



Samoa (island not specified) : 2 (^^, 5 iii., iv. (Tate, O'Connor, and 

 collector unknown — Brit. Mus.). 



Total Samoan material : 31 (^(^, 42 5 exuviae (last instar). 



There are two abundant and widespread Austro-Malayan species of Baeturia, 

 which differ from the other species known to me in the blackish speckling of 

 their pale ground colour. These two, B. exhausta Guer. and B. conviva Stal, 

 liave sometimes been considered only doubtfully distinct (Kirkaldy, Haw. Sugar 

 Planters' Exp. Sta. Entom. Bull., 12, p. 8, 1913). The characters on which 

 they are usually separated are the greater average size of B. exhausta, and the 

 extension of its tegminal cell R5 (3rd apical cell) basad of cell Ro (1st apical 

 cell), whereas in B. conviva the bases of these two cells are opposite. On these 

 two characters the Samoan material all agrees with B. exhausta. 



Save for the Samoan extension of B. exhausta, the range of these two forms 

 seems practically coincident. Judging from the above macroscopic criteria there 

 are in the British Museum examples of both from Burn, Ceram, Amboina and 

 New Guinea. There are specimens of B. conviva only from Dore, Timor, Mysol, 

 Batchian and Duke of York I. (Bismarck Arch. ?) ; and of B. exhausta only from 

 Gilolo, Torres Strait and Samoa. Size is at best an untrustworthy character, 

 and in examples from several Austro-Malayan islands, notably Burn, the vena- 

 tional distinction between the two forms also breaks down. In the British 

 Museum there are two males from the same locality in Buru, taken at the same 



