286 LLOYD'S NATURAL HISTORY. 



[LI. R, C.] GENUS ACIIIVUS. 



Achivus, Barbut, Genera Insectorum, p. 169 (1781). 

 Princeps, Hiibner, Tentamcn, p. i (iSic?). 

 AmaryssiiS) Dalman, CEf. K. Vet. Akad. Handl. Stockh. xxxvii. 

 pp. 60, 85 (1816). 



The type of this genus is regarded by most authors as the 

 type of PapiliO) Linnaeus. It is a well-known European and 

 Mediterranean insect, and is represented by various closely- 

 allied forms as far as the Himalayas, and throughout Central 

 and Northern Asia, to Alaska and California. A closely-allied 

 species, but darker, and with shorter tails (A. hospiton, Gene) 

 is confined to Corsica and Sardinia. The largest and hand- 

 somest of this cluster of imperfectly segregated species is the 

 Japanese A. hippocrates (Felder). 



THE SWALLOW-TAIL. ACHIVUS MACHAON. 



(Plate LXVIL Fig. I.) 

 Papilio machaon, Linn. Syst. Nat. (ed. x.) i. p. 462, no. 27 



(1758); id. Faun. Suec. p. 267 (1761); Esper, Schmett. 



i. (i) p. 31, pi. i, fig. i (1777); Hiibner, Eur. Schmett. 



i. figs. 390, 391 (1803?); Godart, Enc. Meth. ix. p. 57, 



no. 89 (1819); Boisduval, Spec. Gen. Lepid. i. p. 328 



(1836); Stephens, 111. Brit. Ent. Haust. i. p. 6 (1827); 



Newir.an, Brit. Butterflies, p. 150 (1881); Kirby, Eur. 



Butterflies and Moths, p. 2, pi. 2, figs. 3, $a-d (1878); 



Lang, Butterflies Eur. p. 7, pi. i, fig. 4, pi. 5, fig. 3 



(transf. 1881); Barrett, Butterflies of Brit. Isl. p. n, pi. 



i, \a-c (1892) ; Buckler, Larvae of Brit. Lepid. i. p. i, pi. 



i, fig. i (1886). 



The Swallow-tail Butterfly, our only undoubted British repre- 

 sentative of the great Family of the Equitida^ measures from 

 three to five inches in expanse, and is our largest Butterfly, if 



