76 A. WATSON 



Subspecies Gorgonidia garleppi cubotaensis (Reich) comb. n. 



Automolis garleppi cubotaensis Reich, 1938 : 195, fig. 4. Syntypes 5 $, Brazil: Serra do 

 Cubatao (between Santos and Sao Paulo), viii. {Reich) (Reich Collection, Israel) [1 $ 

 examined, labelled 'Paratype']. 



HALISIDOTA Hiibner 



Halisidota Hiibner [18196] : 170. Type-species: Phalaena tessellaris J. E. Smith, 1797: 149, 



pi. 75, by subsequent designation of Kirby, 1892 : 209. 

 Halisidota Hiibner; Travassos, 1946 : 319. [Bibliography. Redescription.] 

 Halisidota Hiibner; Watson, 1971 : 5. [Illustrations of 96 type-specimens.] 



Halisidota baritioides (Rothschild) comb. rev. 



Halisidota baritioides Rothschild, 1909 : 221. Holotype <$, Brazil: Amazonas, Fonte Boa, 



ix.1906 (Klages) (BMNH). [Examined.] 

 Halisidota baritioides Rothschild; Rothschild, 1910c : pi. 12, fig. 11. 

 Halisidota baritioides Rothschild; Strand, 1919 : 70. 

 Automolis baritioides (Rothschild); Hampson, 1920 : 150. 

 Automolis baritioides (Rothschild); Seitz, 192 1 : 370, pi. 51b [grossly inaccurate]. 



ID ALUS Walker 



Empusa Hiibner [18196] : 170. Type-species: Phalaena admirabilis Cramer [1777] : 11, 

 147, pi. 103, fig. 9, by subsequent designation of Hampson, 1901 : 14. A junior homonym 

 of Empusa Illiger, 1798 (Orthoptera) ; replaced by Idalus Walker, 1855. 



Idalus Walker, 1855 : 645. Type-species: Phalaena admirabilis Cramer [1777] : 11, 147, 

 pi. 103, fig. 9, by monotypy of Empusa Hiibner. 



[Lampruna Schaus, 1894 ■' 2 3 I - Type-species: Lampruna rosea Schaus, 1894 : 2 3 J . by 

 monotypy. Listed here following its placement in synonymy by Hampson, 1901 : 14. 

 Its type-species is obviously not congeneric with that of Idalus.] 



Idalus Walker; Seitz, 1921 : 347. 



Idalus Walker; Travassos, 1950 : 217, figs. [Five species reviewed.] 



Idalus Walker; Watson, 1971 : 2, 6. [Types of 26 species illustrated.] 



Several species currently placed in Idalus should be transferred to other genera. 

 However, those listed by Travassos and Watson (see above), together with the 

 following 24 species (and three subspecies), form a particularly homogeneous unit 

 congeneric with admirabilis, the type-species of Idalus. 



Six nominal species of this genus (including aletis Schaus, a junior synonym of 

 Idalus aleteria (Schaus), lineosa, vitrea and critheis, then in Automolis) were studied 

 by Blest (1964). They responded to handling with reflex immobilization (Blest, 

 1957), or the type of display in which the wings are alternately raised and depressed 

 and the abdomen raised. They had various thresholds for sound production. 

 Five species were rejected by Cebus monkeys as a source of food. 



Idalus albescens (Rothschild) comb. n. 



Eupseudosoma albescens Rothschild, 1910a : 26, pi. 4, fig. 25. LECTOTYPE §, Surinam: 

 Maroewym Valley, Aroewarwa Creek, iv.1905 {Klages) (BMNH), here designated [examined]. 



