FAMILY ZYG^NID^. 33 



Clemens Proc. Phil. Acad. Nat. Sc. Nov. 1860, is evidently a 

 synonym. Of the former genus a figure -was simply published, 

 Dr. Clemens has however given a careful description of the 

 genus as named by him. 



Cte nucha Kirby. • 



In 1839 Dr. Harris* placed Ctenucha as a subgenus of 

 Glaucopis immediately after the subgenus Lycomorpha, and 

 including C. semidiaphana Harris in it, gives generic charac- 

 ters to suit the admission of this last named species. 



In 1854 Walkerf divides the genus Ctenucha into four 

 groups of species. Group 1. Ctenucha proper, includes C. 

 latreillana Kirby. Group 2. P/iiloros, includes three species 

 from Mexico and New Grenada. Group 3. Scepsis, includes 

 a single species $. fulvicollis, and group 4. Aglaope is 

 restricted to A. americana Boisd. for which Mr. Walker thus 

 makes a new synonym Ctenucha americana Walker. His 

 description of the species is copied verbatim from Harris, except 

 that the measurements are omitted, though three specimens are 

 referred to as coming from Georgia, and "presented by E. 

 Doubleday Esq." p. 286. 



In 1860 Dr. Clemens^ excludes Aglaope americana Boisd. 

 and divides Ctenucha into four groups, with C. latreillana 

 Kirby as the type, discarding Walker's subgenera P/iiloros 

 and Scepsis. 



We venture to say that of all the species referred to this, 

 genus by Walker only C. virginica Grote (latreillana Kirby) 

 andC. cressonana Grote belong properly to it, and would limit it, 

 for the present, by the characters subjoined. Ctenucha virgo 

 H-S. from the " Antilles" belongs to another genus. 



Mr. A. R. Grote has shown§ that Ctenucha latreillana Kirby 

 is the Sphinx? virginica Charpentier. Edit. Esper's Exot. 

 Schm. Sphing. Exot 1830 Plate 2, fig. 3 male, 4 female. He 

 says also, " I have taken it in damp woods in the vicinity of Buf- 

 falo, N. Y., as well as along the Canadian shore of the Niagara 

 River. It has also been reported to me as having been taken in 

 different parts of the Eastern and Middle States." 



* Cat. N. Amer. Sphinges. 



f List of Lep. Brit. Mus. Pt. II. Lepidoptera Heterocera. London, 1854, 

 X Proc. Acad. N. Sc. Phil. Nov. 1860. p. 537. 

 § Proceedings Ent. Soc. vol. ii Dec. 1863, p. 334. 

 ESSEX INST. PROCEED. VOL. IV. E. 



