DESCRIPTION OP THE SPECIES. 221 



rounded off, the curve formed by it striking the anterior margin 

 nearly at a right, the posterior margin at an acute angle ; the 

 latter margin, however, is not quite reached, as a narrow hyaline 

 space remains between it and the dark coloring ; this curve would 

 have been a perfect one, were it not for a small projection before 

 the posterior crossvein and for a small excision immediately 

 beyond it ; near the anterior margin, the dark-brown coloring, 

 immediately before its end, is interrupted by a triangular hyaline 

 indentation, the tip of which reaches the third longitudinal vein 

 immediately before the small crossvein; the distal side is con- 

 cave, the proximal side is straight and perpendicular to the 

 costa. The brown coloring has no distinct limit towards the 

 base of the wing ; it gradually dissolves into a system of irregu- 

 lar spots ; the costal cell is hyaline, with the exception of a 

 brown infuscation along the costa between the humeral crossvein 

 and the auxiliary vein ; likewise hyaline are the extreme basis 

 of the marginal cell and the entire second basal cell with the 

 exception of a very narrow brownish-black border along the 

 veins inclosing it; the first basal cell at its root, as far as the 

 humeral crossvein, is also rather hyaline; beyond this, for an 

 almost equal distance, it is yellowish; the anal cell is of a dirty 

 yellow, blackish-brown towards its end, which color also extends 

 over the basis of the third posterior cell ; alula, posterior angle 

 of the wing, and the portion of the third posterior cell lying along- 

 side of it, are hyaline ; moreover, in the third posterior cell, quite 

 near its basis, at the place where it is contiguous to the second 

 basal cell, there is an elliptical hyaline drop; in the first basal 

 cell, below the beginning of the third longitudinal vein, there is 

 a longitudinal spot of a dirty ferruginous color; a somewhat 

 larger spot of the same coloring is in the marginal cell, below the 

 place, where the auxiliary vein diverges from the first longitu- 

 dinal. The hyaline apical portion of the wing shows a narrow 

 crossband, covering the posterior crossvein, almost perpendicular, 

 very gently curved, of a brownish-black color; its anterior end 

 turns towards the costa in the shape of a bow and follows it 

 afterwards as a narrow border, as far as the tip of the fourth 

 longitudinal vein. 



Bab. Mexico (collection of Mr. v. Roeder). 



