ME. A. G. BUTLER ON THE 8PHINGIDJE. 545 



The type of this species was presented to the collection by the Rev. 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. 

 S , Zonilia mixtura, Walker, Lcp. Het. Suppl. i. p. 34 (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. Otus, Hiibner. 

 Otus, Hiibner, Verz. bek. Schmett. p. 142. gen. 1 (1816). 



1. Otus syriacus. 



Deilephila syriaca, Ledercr, Ver. zool.-botan. Vereins Wien, Band v. p. 195, Taf. 2. figs. 9, 12 



(1855). 

 Pergesa syriaca, Walker, Lcp. Het. Suppl. i. p. 32 (1864). 



Siberia (Lederer). 



Allied to 0. chcerilus 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 I), 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 chcerilus. 



Sphinx chcerilus, Cramer, Pap. Exot. hi. p. 91, pi. 247. fig. A (1782). 

 Otus cluerilus, Hiibner, Verz. bek. Schmett. p. 142 (1816). 

 Chcerocampa chcerilus, Harris, Sill. Journ. vol. xxxvi. p. 302 (1839). 

 Darapsa chcerilus, Walker, Lep. Het. viii. p. 182 (1856). 

 Sphinx azalece, Smith and Abbot, Ins. Georg. vol. i. p. 53, pi. 27 (1797). 

 Sphinx clorinda, Martyu, Psyche, pi. 25. figs. 66, 67 (1797). 



United States {Doubleday) ; West Canada (Bush). B.M. 



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