2 ACA—ACT 
Acanthylis, Boze, Isis, 1826, p. 971, et 1844, p. 166. 
Acanthyllis, Agassiz, Index Univers. p. 3 (1846). = ACANTHYLIS, 
Bote. 
Acanthys, Des Murs, Traité d’Ool. p. 334 (1862). = ACANTHIS, 
Bechst. 
Accentor, Bechstein, Ornith. Taschenb. i. p. 191 (1802); Naturg. 
Deutschl. iii. p. 700 (1807). 
Accipiter, Brisson, Ornith. i. p. 310 (1760). 
Acentetus, Cabanis, Mus. Hein. iv. pt. 1, p. 102 (1862). 
Aceros, Hodgson, in Gray’s Zool. Miscell. p. 85 (1844); Journ. 
As. Soc. Bengal, xxiv. p. 579 (1855). 
Acestrura, Gould, Introd. Trochilide, p. 91 (1861), 8vo. 
Acetinornis, Bp. C. R. xlii. p. 880 (1856), et xlv. p. 428 (1857). 
Achantylops, Bp. Rivista Contemporanea, p. 6 (1857). 
Acis, Lesson, Traité d’Orn. p. 388 (1831) ; Compl. de Buffon, viii. 
p. 370 (1887); éd. 2, it. p. 396 (1848). 
Acnemis, Kaup, Isis, 1848, p. 769; Arch. f. Naturgesch. 1851, 
pt. 1, p. 106; Trans. Zool. Soc. iv. p. 225 (1852); in Jar- 
dine’s Contr. to Ornith. 1852, p. 111. 
Acomus, Reichenbd. Natiirl. Syst. Vogel, p. xxx (1852); Bp. C. R. 
xliti. p. 415 (1856). 
Acontistes, Sundev. K. Vetensk.-Ak. Hand]. Stockholm, 1835, p. 95 
(1836). 
Acredula, Koch, Syst. baier. Zool. p. 199 (1816). 
Acridiornis, Severtzoff, Turkestanskie Jevotnie, p. 66 (1873). 
Acridotheres, Vieillot, Analyse, p. 42 (1816); Nouv. Dict. d’Hist. 
Nat. xix. p. 389 (1818); Galerie d. Ois. i. p. 239 (1825). 
AcrIpoTHERA, Analyse, p. 69 (1816). 
Acrocephalus, Naumann, Nat. Land- u. Wasservog. nérdl. Deutschl. 
Nachtr. p. 199 (1811). 
Acrocompsa, Cabanis, J. f. O. 1861, p. 88. 
Acroleptes (Schif?), Bp. C. R. xxxviii. p. 389 (1854); C.8. O. p. 23 
(1854); Cab. J. £. O. 1861, p. 90. 
Acropternis, Cabanis, Mus. Hein. ii. p. 20 (1859). 
Acrulocercus, Cabanis, in Arch. f. Naturgesch. xiii. pt. 1, p. 327 
(1847); Lichtenstein, Nomencl. Av. p. 54 (1854). 
Acryllium, Gray, List Gen. B. p. 61 (1840); ed. 2, p. 78 (1841); 
Gen. Birds, iii: p. 501 (1845); Hand-l. ii. no. 2394 (1870). 
Actenoides, Hombron et Jacquinot, in Voyage au Péle Sud, Zool. 
iti. p. 100, pl. xxiii. fig. 2 (1845); Reichenb. Handb. spec. 
Orn. p. 35, Atlas, pl. eccexii. fig. 3147 (1851). 
Actidurus, Bp. Saggio, p. 143 (1831); Isis, 1833, p.1228. Aor 
tuRUs, Bp. Comp. List Birds of Eur. & N. A. p. 51 (1838); 
