pa CLARK — NEW AMERICAN SPHINGIDAE 49 
scales. This area is bluntly arrow-shaped at the inner margin, and is a 
marked characteristic of the species. Line 2 is closely parallel to 1, begin- 
ning slightly apically from it on SC5, and uniting with it before reaching 
the inner margin. Lines 3 and 4, united at their beginning on SC5, run 
slightly separated to R3, where they fade to a series of dark dots, reappear- 
ing again at M2, and converging to lines 1 and 2 on inner margin. Line 5, 
broader than 1 to 4, runs from the apex to the inner margin, almost parallel 
to the distal margin; it also becomes lighter from R3 to M2, but continues 
asaline. This partial disappearance of lines 2, 3, 4 and 5, from R3 to M2, 
produces a light brown area similar to that in thyelia, except that the 
reappearance of these lines on M2, gives the effect of a chocolate-brown 
broadly lunar patch extending from the hinder angle of the basal area to the 
hinder angle of the fore wing. Line 6 is lighter brown than the rest, and 
extends from the apex to the hinder angle, being closely marginal. 
Fore wing, below: There are traces of the three or four discal lines of 
thyelia. A broad brown discal area fades away to yellow toward the apex 
and the outer margin. This yellow area is irrorated with black scales, 
and there is a series of large black submarginal patches in it, the first 
apical, the rest between the veins to the hinder angle except between R2 
and M1 where they become a group of irrorated black spots. A small black 
dash on the costal margin 4 mm. from the apex. 
Hind wing, above: Similar to thyelia but dark at anal angle and uni- 
colorous. Below, discal area and anal fold yellow. Marginal area so 
heavily irrorated with black scales as to become practically black. Toward 
the inner edge of this black area three narrow distinct black lines from 
SC2 to M2, parallel to the distal margin. 
This species occurs in Costa Rica in the same localities as does 
thyelia. The sagittate effect produced by the arrangement of the 
lines of the fore wing, in connection with the basal area, is, so far 
as I know, unique in the genus Xylophanes. 
A specimen of X. thyelia from Peru is reproduced for purposes 
of comparison (Plate V, figure 2). 
