NATURAL SCIENCES OF PHILADELPHIA. 539 



Wings long, narrow ; fore wings opaque, post-apical exterior to apical nervulet ; 

 hind icings hyaline in the middle. Palpi curved. 



C. fulvicollis, Hiibner. Glaucopis (Ctenucha) semidiaphana, Harris, 

 Cat. N. A. Sphin., 38, 4. Slate-colored or blackish brown. Antennae bluish, 

 black. Palpi, basal joint ochreous, the other joints blackish. Head above, 

 patagia, prothorax beneath, tegulae in front and a stripe beneath the fore 

 wings ochreous or orange. Fore wings with a luteous stripe along the ex- 

 treme costa. Wings with cilia of the general hue. Abdomen bluish black, 

 scarcely metallic. 



Illinois. Mr. Kennicott. 



Aglaope, Latr., Boisd. 



Wings extremely narrow. Hind wings ovate-lanceolate, narrower than the 

 fore wings ; length much less than that of the body ; length of the fore wings 

 somewhat more than that of the body. The disk of fore wings closed by a 

 very faint, irregular vein, with two disco-central nervules; subcostal vein with 

 a single marginal nervule from the posterior end of the disk and with the 

 apical branch trifid near the tip of the wing or bifid with a long fork. Median 

 vein 4 branched, with the posterior scarcely remote from the penultimate. 

 Fold of the wing thickened from the base to the tip. Submedian with a short 

 fork at the base of the wing. Hind wings without costal nervure ; subcostal 

 bifid, with an oblique discal vein arising near the base of the lower branch, 

 and angulated above the medio-superior nervule, where it receives the discal 

 fold. Median vein 4-branched, with nervules nearly equidistant. 



Head rather small, tree, smooth ; with large ocelli. Face smooth, rounded, 

 rather narrow. Eyes rather small, scarcely prominent. Antenna? with bases 

 approached, much shorter than the body, rather deeply pectinated in the tf, 

 less pectinated in the 9- Palpi very minute, filiform, drooping, with only 

 two distinct joints ; terminal joint acute. Tongue about as long as the thorax 

 beneath. 



Body extremely slender, cylindrical, not metallic. Patagia cylindrical, 

 minute. Abdomen without lateral tubercle, tufted at the tip and along the 

 sides. Legs extremely slender ; fore tibiae without tibial spur ; hind tibiae 

 with two very minute apical spurs. 



A. Americana, Boisd., Griff. An. Kingd. Lep. Procris Americana, 

 Boisd., S. G. Lep., i. pi. 16. f. 7; Guer. Icon. Keg. An. Ins., pi. 84, bis. f. 11. 

 Procris dispar, Har., Cat. P. Americana, Har., Cat. N. A. Sphin., p. 35. 

 Ctenucha Americana, Walker, 286. Blue black. Prothorax above entirely 

 fulvous or orange. 



Mass., New York, Penn., Ga. 



Subcostal vein exterior to the disk, trifid ; apical branch with a long fork. 



A. coracina. The specimens are imperfect and denuded. The entire 

 insect is black, without the orange colored prothorax of American a. 

 Texas. Capt. Pope's collection. From Smithsonian Institution. 



Acoloithus. 



The following insect greatly resembles Americana in appearance and 

 almost exactly in ornamentation. It must, however, be very distinct from it. 

 The wings are extremely narrow. Hind wings broader than the fore wings, 

 less ovate than in Americana, and rounded at the interior basal angle ; 

 length rather more than thai of the body. The disk of the fore wings is closed by 

 a rather faint, irregularly oblique vein, with one disco-central nervule, and an- 

 gulated at the medio-superior nervule, where it receives a rather faint discal 

 fold. The subcostal vein with three equidistant, moderately erect marginal 



1860.J 



