282 LEPIDOPTERA HETEROCERA. 



abdominal segment with a conspicuous tubercle on each side. Spurs 

 of the hind tibiae small, four in number, two terminal, and two be- 

 yond the middle of the tibiae. 



Group 1. 



Corpus cylindricum, gracile, metallicum. Palpi porrecti, ca- 

 pite paullo longiores; articulug 2us lo longior; 3us acuminatus, 2o 

 brevior. Proboscis thorace vix brevior. Antennae corpore multo 

 breviores, maris late pectinatae, foeminae subpectinatae. Alae sat latae, 

 elongato-trigonae ; anticae postice subangulares. Abdomen alas pos- 

 ticas perpaullo superans. Pedes graciles; protibiae maris bidentatae, 

 foem. unidentatae ; posticae calcaribus quatuor sat longis. 



Body cylindrical, slender, metallic. Palpi porrect, a little 

 longer than the head ; second joint longer than the first ; third acu- 

 minated, shorter than the second. Proboscis nearly as long as the 

 thorax. Antennae much shorter than the body, deeply pectinated in 

 the male, slightly pectinated in the female. Wings moderately 

 broad, elongate trigonate. Fore wings slightly angular by the tips 

 of the hind wings ; median and subcostal veins connected by nearly 

 upright veinlets at the tip of the discal areolet in which the discal 

 fold is distinct and is connected beyond with the first inferior vein; 

 second, third, and fourth inferior veins distinct ; first and second 

 having a common base at the tip of the areolet ; third very near 

 them ; fourth more than four times more remote from the third, than 

 the third is from the second ; two superior veins, the second forked 

 before half its length. Legs slender ; fore tibiae of the male biden- 

 tate, of the female unidentate beneath ; hind tibiae with four mode- 

 rately long spurs. Abdomen extending very little beyond the hind 

 wings. 



1. Ctenucha Latreillana. 



Fusca ; caput aurantium ; antenna nigrce ; humeri aurantii ; ab- 

 domen cyaneum. 



Ctenucha Latreillana, Kirby, Fauna Bor. Amer. iv. 305, 1. 

 Glaucopis (Ctenucha) Latreillana, Harris, Descr. Cat. N. Amer. 

 Sphin. 39, 5. 



New Hampshire. Maine. Canada. Nova Scotia. 



a — g. Nova Scotia. From Lieut. Redman's collection. 

 h. United States. Presented by E. Doubleday, Esq. 



i y j t ? From Mr. Children's collection. 



k, I. Canada. Presented by Dr. Bamston. 



