NATURAL SCIENCES OF PHILADELPHIA. 523 



The wings of the specimen described are badly denuded from the disk to 

 the costa, yet the markings given above are sufficiently distinct and charac- 

 teristic to indicate the insect hereafter. The genus belongs to the family 

 Bombycidae. 



Mexico, near Jalapa. 



ARCTIIDiE. 

 Ecpantheria, Hiibner. 



Fore wings about one-third longer than the hind wings, with the subcostal 

 vein having a single marginal branch from the cell and another midway be- 

 tween the post-apical and inferior nervules ; the latter arises a little exterior 

 to the discal vein and the former midway between th<^ apical nervulet and the 

 second marginal. The median vein is 4-branched, with the posterior moder- 

 ately remote from the penultimate. Hind wings as long as the abdomen, 

 with the interior sometimes dilated and rather caudate ; neuration arctiae- 

 form. 



Head small, depressed, smooth ; without ocelli. Face moderate, retreating. 

 Eyes rather small. Antennae serrated in the rj 1 , simple in the Labial 

 palpi short, not extending beyond the clypeus, rather stout and porrected ; 

 middle joint short, terminal joint very small. Tongue rather thick, slightly 

 longer than the anterior coxae. 



Body stout. Thorax globose, smooth, with scales. Patagia erected, over- 

 lapping the front of mesothorax, nearly square. Breast and abdomen smooth. 

 Legs thick and smooth, the tibial spur of fore legs moderate, hind tibiae with 

 two minute apical spurs. 



Table of Species. 



Thorax white. 



With many blackish or brown ringlets. 



Abdomen yellow, with bluish black dorsal spot', Scribonia. 



Abdomen red, with broad blue bands, c a u d a t a. 



Abdomen dark blue above, with luteous spots <-J* Icunieunda. 



Abdomen luteous, with blue, purple, or green bands 9 J 

 With ten bluish black spots, extrema. 



Without ringlets or spots, o b 1 i t e r a t a . 



With ocellated spots. 



Abdomen blue, with crimson bands, nigriplaga. 



Abdomen ochraceous, with lateral blue spots. 



Hind wings of ^ hardly tailed, simplex. 



Hind wings of ^ with rather long tail, decora. 



Thorax cinereous. Fore wings with white, black bordered 



streaks, incarnata. 



E. Scribonia, Stoll. White. Thorax and fore wings with numerous 

 brown circles, on the latter arranged in five or six illy defined, curved bands. 

 Hind wings with a few circles along the exterior margin and a row along the 

 hind margin. Abdomen beneath white, with three rows of small brown 

 circles ; above bluish black banded with yellow, or orange yellow, with two 

 lateral rows of dark margined, whitish spots. Sometimes the thorax, under 

 portion of the body, the base and basal margins of the fore wings are pale 

 brown. 



Texas. Col. of Capt. Pope, Smithsonian Institution. 111., Mr. Kennicott ; 

 N. Y., Ga., S. America. 



*E. caudata, Walker. White. Head dark blue in front, excepting a 

 white spot on the face. Antennae dark blue. Thorax with numerous brown 

 ringlets, some of which are tinged with pale metallic blue or green. Abdomen 

 red, clothed with testaceous hairs at the base ; dorsal segments with broad 



I860.] 



