MR. A. G. BUTLER ON THE SPHINGIDA. 545 
The type of this species was presented to the collection by the Rey. R. P. Murray. 
It is exceedingly closely allied to A. anceus of Cramer, from the female of which it 
scarcely differs, excepting in its superior size, slightly broader and less angular primaries, 
and a dark brown longitudinal streak on the thorax; it may, I think, be the female of 
Zonilia mixtura of Walker. 
5. ACOSMERYX MIXTURA. 
3, Zonilia miztura, Walker, Lep. Het. Suppl. i. p. 84 (1864). 
Aru. 
Not having seen the type, I can only judge by the description that Z. mixtura is re- 
ferable to this genus. 
Genus 2. Ortus, Hiibner. 
 Otus, Hiibner, Verz. bek. Schmett. p. 142. gen. 1 (1816). 
1. OTUS SYRIACUS. ’ 
Deilephila syriaca, Lederer, Ver. zool.-botan. Vereins Wien, Band vy. p. 195, Taf. 2. figs. 9, 12 
(1855). 
Pergesa syriaca, Walker, Lep. Het. Suppl. i. p. 32 (1864). 
Siberia (Lederer). 
Allied to O. cherilus of Cramer. 
The genus Otus was restored to the first three species of Walker’s Darapsa in 1865, 
thus restricting the group to nos. 4-10. But, as I have shown, all the species excepting 
no. 4 are referable to other genera previously formed; so that Mr. Grote, to all intents 
and purposes, fixed D. rhodocera as Walker’s type. I find, however, that in the first vol. 
Bull. Buffalo Soc. Nat. Sci. p. 22 he has restored Walker’s name to Otus of Hiibner, a 
genus which is structurally distinct from the type already fixed; I am therefore unable 
to follow this later decision of his. He does not state his reasons for the alteration in 
the Bulletin, nor am I aware that he has done so elsewhere; still I am satisfied that so 
sound an entomologist has not acted capriciously. 
2. OTUS CHARILUS. 
Sphinx cherilus, Cramer, Pap. Exot. iii. p. 91, pl. 247. fig. A (1782). 
Otus cherilus, Hiibner, Verz. bek. Schmett. p. 142 (1816). 
Cherocampa cherilus, Harris, Sill. Journ. vol. xxxvi. p. 302 (1839). 
Darapsa cherilus, Walker, Lep. Het. viii. p. 182 (1856). 
Sphinx azalee, Smith and Abbot, Ins. Georg. vol. i. p. 53, pl. 27 (1797). 
Sphinx clorinda, Martyn, Psyche, pl. 25. figs. 66, 67 (1797). 
United States (Doubleday) ; West Canada (Bush). BM. 
4p 2 
