A. R. Grote's Notes on the Zygxnulx of Cuba. 311 



Did segmentary maculations, distinctly margined with black scales. 

 The Bpecies is Dearly allied to M. Carolina, but is smaller than Lin- 

 nsBUs' species, and at once distinguished by its 'different color. The 

 resemblance between these two species is analogous to that existing 

 between Amphonyx antjeus, and A. dnponchel. I have been misled 

 by the stained and defective state of the original ( £ ) specimen sent by 

 Prof. Poey,and from which the figure of S. afflicta, as above cited, was 

 taken. With the corrections here noted, the specific diagnosis and 

 figure will sufficiently serve to identify the species. 



Mr. C. T. Robinson has called my attention to the fact that in its 

 maxillary and other characters, this species agrees with Macrosila, as 

 restricted by myself in late papers, and that the genus Syzygia, is not 

 sufficiently distinct to be received as an independent structural form. 

 The determination of this species remains, then, as proposed by Mr. 

 Walker in the British Museum Lists, and the genus Syzygia is with- 

 drawn. The species of Macrosila, as now amended, are as follows: 



GROUP I. 

 1. M. aper, Boisd., H-S. ! 

 Tvi-k. 2. M. rustica. Walk., .' {Sphinx rus., Fabr., Sph. chionanthi, Smith). 



3. M. ochus, Grote, .' (Sphinx och., King ; Macr. instita, Clemens). 



4. M. afflicta, Walk.,! (Sphinx affl.., Grote). 



5. M. Carolina, Clemens, '. (Sphinx Carolina, Linn). 



6. M. quinquemaculata, Clem.,.' (Sphinx quinquem.,Ha,worth; Phleyeth- 



ontius celeus, Hilbnerj Macr. celeus,G. & R). 



GROUP II. 



7. M. cingulata, Clemens, ! (Sphinx ring., Fabr. ; Sph. convolvulfy Drury, 



Smith; Sph. druroei, Donovan, Steph., Wood). 



8. M. convolvuli, G. & R., .' (Sphinx convol., Linn). 



For the sequence of the initiatory genera of the Tribe Sphingini, I 

 refer here to a recent Paper by Mr. Robinson and myself, contained in 

 the Annals of the New York Lyceum, October, 186G. In this paper 

 the position of the European Sphinx ligustri, Linn., is discussed with 

 regard to the North American species of the genus. The elimination 

 of the genus Diludia, G. t& R., renders the respective homogeneity of 

 Macrosila and Sphinx, as now considered, sufficiently apparent, as to 

 justify the view that these two latter are distinct structural forms. The 

 North American species hitherto referred to Dolba, Walk., and Hyloi- 

 cus, Hubner, may in future need a generic revision. Hyloicus conifer- 

 arum, Hiibn., as illustrated by Abbot, has not been identified by us; 

 the probability has been already suggested that Ellema harrisii, Clem., 

 is the species intended by Abbot. 



