M 1923 12 ] CLARK — THIRTY-THREE NEW SPHINGIDAE 51 



Fore wing above: Basal half with no markings whatever, save the sub- 

 basal patch with its base on inner margin. This patch is but 3 mm. broad, 

 while in the male it is 7 mm. at its widest point. Apical half of the wing 

 darker in tone than basal half, but much lighter than in male, and decidedly 

 more uniform in color. Other markings faint. 



Hind wing above : Light rose color, except for the following. One heavy 

 brown submarginal patch, extending from anal angle to a point midway 

 between M2 and Ml. Two narrow distinct lines basad of this patch, and 

 roughly parallel to it, the anterior one becoming obscure before reaching 

 M2. 



Fore wing beneath : Similar to male, but all markings faint. Red basal 

 area lighter in tone and less extended. 



Hind wing beneath: Lighter in tone than in male, and the transverse 

 lines faint. 



Orecta acuminata sp. nov. 



Al. ant. long., <?, 37 mm. Al. ant. lat., d\ 14 mm. Marg. ext., d\ 

 21 mm. 



Habitat. — One male in coll. B. Preston Clark, taken at Cerro de la Capa 

 Vieja, near Tucuman, Argentina, altitude 1500-1800 metres, January 4, 

 1921, by Rodolfo Schreiter. 



Antennae light brown; palpi, thorax, and abdomen above, light buff. 

 Mesothoracic tegulae rich reddish brown. Median abdominal line faint, 

 as are the transverse lines at the segments of the abdominal tergites. Legs 

 and abdomen beneath light buff. 



Fore wing above: Cilia dark brown. No basal dot. Light brown sub- 

 basal area, 2 mm. in width and 4 mm. in length, extends obliquely from a 

 point on inner margin 3 mm. distant from base toward a point on the 

 costal margin one fourth the distance from base to apex. Prominent dark 

 brown stigma at apex of cell, half within and half without it, 2 mm. in 

 diameter. Three more faint dots between this stigma and wing apex — 

 one between SC4 and SC5, 10 mm. from apex, a second between SC5 and 

 Rl, 11 mm. from distal margin between the veins, and a third between Rl 

 and R2, 11 mm. distant from distal margin between the veins. A sharply 

 defined distal marginal band, similar to that in the genus Oxyambulyx, 

 widens evenly from the wing tip until on R2 it is 2.5 mm. broad; thence it 

 narrows gradually to hinder angle. A dark streak 4 mm. in length runs 

 longitudinally between M2 and SM2 near hinder angle. No other mark- 

 ings on wing. 



Hind wing above: Cilia dark brown, tipped with white. Wing unicolor- 

 ous, save for a minute anal dot and a dark transverse mark 3 mm. in length 

 near anal angle. 



