222 Dr. Clemens' Notes on Thyridopteryx ephemerseformis. 



elongate lanceolate, discoidal areolet closed, and with a longitudinal 

 nervure; first and fourth marginal nervures furcate ; posterior wings 

 small." 



Stephens gave to this genus the name Thyridopteryx. 



In the " Synopsis of the Bombycidse of the United States by Dr. 

 A. S. Packard," another group is mistaken for this of Stephens and 

 Thyridopteryx ephemerseformis of Haworth is tabulated as (Eceticus 

 coniferarum Harris, MS. 



Mr. Grote in a subsequent paper, " Notes on the Bombycidae of 

 Cuba," (Proc. Ent. Soc. Dec. 1865, p. 246), while very properly 

 rejecting Dr. Packard's determination, places the insect in a new 

 genus Hymenopsyche and upon rather unstable ground erects an addi- 

 tional species. He gives an excellent description of the neuration of the 

 species, but misnames the subcostal nerve of the hind wings the " cos- 

 tal ;" the hind wings are without a costal nervure. He notices the 

 peculiarity alluded to by Stephens that "the first and fourth marginal 

 nervures are furcate," but this is merely an individual pecularity in 

 some specimens, in which the medio-superior nervule is occasionally 

 furcate at the extreme tip. 



Stephens specimen was doubtless nearly or quite denuded, the 

 antennas were injured and the hind wings were almost entirely 

 destroyed, and yet his generic description is sufficiently graphic, to- 

 gether with the description and figure given, to identify it at once with 

 Hymenopsyche of Grote. 



The synonymy of this species would therefore stand as follows : 



THYRIDOPTERYX EPHEMERSEFORMIS. 



Sphinx Ephemerseformis, Haw., Lep. Brit. 72. 



jEgeria Ephemerseformis, Haw., 111. Brit. Ent. Haust. 1. 145. 



Thyridopteryx Ephemerseformis Stephens, Trans. Ent. Soc. 

 Lond. Vol. I, p. 76, pi. 10, f. 1. 111. Brit. Ent. Haust. Vol. IV. 

 Doubleday, on some N. American Lep., Entomologist, p. 97. Grosse, 

 Zool. II, 537. Walker, Cat. Brit. Mus. IV. 959, 60. 



(Eceticus coniferarum Packard, Proc. Ent. Soc. Phila., Nov. 

 1864, p. 351. 



Hymenopsyche coniferarum and thoracicum? Grote, Proc. Ent. 

 Soc. Phila. Dec. 1865, p. 248. 



