NORTH AMERICAN LEPIDOPTERA. 221 



spects agreed with Drury's figure and description. Later Mr. Hulst 

 obtained from normal S and 9 a brood of over thirty imagines. 

 About half of these were of the normal form. Of the remainder 

 one, a male, was a perfect specimen of the variety jainaieensis, and 

 the rest filled every gradation between it and the type form. One 

 specimen had but one or two blue scales to represent the second ocel- 

 lus. In every case it was the inner ocellus which showed a tendency 

 to be lost. The outer one seemed nearly constant, except in position. 

 As the inner one faded the outer one approached a little the centre 

 of the black space, which became at the same time less elongate. 

 Mr. Hulst also speaks of a female in which a few scales represent a 

 a third ocellus. Clemens also says that the spot may have two or 

 three blue pupils. This form Mr. Grote has named tripartiim in his 

 most recent opiis, basing his action upon information obtained in 

 Prof Fernald's paper, as in the creation of the subgenus Copwne- 

 rinthus. 



The terms jamaiceiisis and ocellatas both have priority of geminatus. 

 The latter is a synonym of the former. Jamaicensis, however, is not 

 only a misnomer, but is inexpressive and absolutely misleading, 

 whereas gemimdns well expresses one of the most marked superficial 

 features of the species, and refers also to the true stem form. I have, 

 therefore, retained tSay's name, following in this all prior writers on 

 the group. 



The genitalia of the male emphasize the other difi^erences. The 

 side piece is very broad at base, furnished inferiorly with a rather 

 stout, somewhat beak-like, obtusely rounded tip. It suddenly nar- 

 rows at this point from the declivity giving off another shorter, but 

 rather more pointed si)ur, and finally from the ujiper margin near 

 tip giving ofi^ a spatulated beak with rounded tip. 



The larva has been mentioned, and more or less completely de- 

 scribed by a number of authors. 



S. oplitlialitiictis Bd., Anu. Soc. Ent. Fr, iii. 3d ser. 32, Smerinthus ; Lep. 



Cal. Auu. Soc. Belg. xii. 67, Smerinthus ; Clem., Jouni. Ac. N. Sci. Phil. iv. 



1859, 184, Smerinthus; Morr., Syn. 1862, 211, Smerinthus ; G. & E., Pr. E. Soc. 



Phil. V. 160, Smerinthus : Liut. Ent. Cont. ii. 125, Smerinthus; Grt., BuflF. 



Bull. i. 23, Smerinthus ; Bd., Sp. Gen. Het. i. 31. pi. i, fig. 1, larva; Strk., Lep. 



Ehop. et Het. i. 58, pi. vii, fig. 5 9 , Smerinthus ; Edw.,* Pr. Cal. Ac. Sci. vi. 



91 ; id. vii. 21 : Butl., Tr. Zool. Soc. Lond. ix. 592, Smerinthus. 

 Var. pallidulus Hy. Edw.,« Pr. Cal. Ac. Sci. vi. 91 ; Strk., Lep. Rhop. et Het. 



58, pi. vii. fig. 4 l ; Grt., Bufi". Bull. iii. 223. 

 Var. vancouverensis Butl., Tr. Zool. Soc. Lond. ix. 593, Smerinthus. 



