NORTH AMERICAN LEPIDOPTERA. 219 



Gem'matiis has bi-pectinated antennae iu the % , a single branch to 

 each side of each joint. The pectinations slender, curved, cylindrical, 

 with rounded tip, fringed with fine cilia). Tlie primaries have the 

 outer margin slightly produced on veins one, three, seven and eight. 

 The ocellate spot is geminate, i. e., the blue centre is completely di- 

 vided by a black band. Rarely tiie l)and is not complete and the 

 Viuiety jamaicensis is thus formed. Mr. Grote has proposed the term 

 Eusmerinfhits for this species. 



In ophthalmicus the antenna? of the % have a single series of thin 

 square laminte, each nearly equal in length to the joint, and upon 

 each side there are two rows of fine cilia which converge at the tip. 

 The outer margin of primaries is somewhat produced on veins 1, 3, 



4, 6 and 8, but less prominently than in the other species. The 

 ocellus is single. 



In eery sli the antennae are similar to those in ophthalmicni< ; the 

 outer margin of primaries are somewhat markedly produced over 

 veins 1, 3, 4, 6, 7 and 8. The distinguishing structural feature is a 

 very short blunt spine at the tip of the fore tibia? to which Prof. 

 Fernald first called attention and upon which Mr. Grote based his 

 generic term Coplsmerinthus, not aware that ophthalmicus shared this 

 peculiarity, and using another's labors to secure a new generic term. 

 We are thus, fortunately, in possession of a generic term for every 

 one of our species with the solitary exception of mijops. I cannot 

 find that this has been made the type of a genus. 



It will be noted that in the arrangement here given the species 

 add regularly to the number of dentations of primaries ; geminatus 

 has four ; ophthalmicus and cerysii six ; so that the species are distin- 

 guishable by this character alone. 



Mr. 8trecker's species astarte is a form of cerysii. 



5. geminatus Say, Am. Eiit. i, 25, pi. V2, Smerinthiis ; Han-., Sill Jouru. 36, 

 29, Smerinthus; Wlk., C. B. M. Lep. Het. viii. 246, Smerinthus : Lee. ed. Say 

 Am. Ent. i, 25, pi. 12; Clem.,* Jouru. Ac. N. Sci. Phil. iv. 1859, 183, Smerin- 

 thus; Morris,* Syn. 1862, 210, Smerinthus; Lint.,* Pr. Ent. Soc. Phil. iii. 665; 

 Ent. Cout. ii, 119, life history ; G. & E., Pr.' Ent. Soc. Phil. v. 185, Smerin- 

 thus; Eeed, Can. Ent. i. 40; Pack.* Guide 275, Smerinthus; Grt., Buff. Bull, 

 i. 23, Smerinthus; Strk., Lcp. Ehop. et Het. i. 56, pi. vii, {\gs d %. 7 9. 

 Smerinthus; Bd.,* Sp. Gen. Het. i. 39, Smerinthus; Butl.. Tr. Zool. Soc. Loud, 

 ix. 592, Calasymholus ; Grt., Can. Ent. ix. 132, Eusmerbithus ; Buff. Bull. iii. 

 223. Eusmerinthus ; Hulst,* Bull. Bkln. Ent. Soc. i. 67; id. ii. 35, Smerinthus ; 

 Fernald,* Sphing. 77, Smerinthus; Grt., Hawk Moths 35, Calasi/mbolus. 



