eas 
44 CLARK — NEW AMERICAN SPHINGIDAE Vol. VI 
Amplypterus gannascus dentoni subsp. nov. 
Plate V, figure 1. 
Al. ant. long., o', 54 mm. Al. ant. lat., o&, 18 mm. Marg. ext., o, 
30 mm. 
Habitat— Chanchamayo, Peru. Two males in coll. B. Preston Clark, 
and given by Mr. William D. Denton, Wellesley, Massachusetts, after 
whom the subspecies is named. 
A lighter-bodied and narrower-winged insect than A. gannascus. The 
general color of fore wings above, anal angle of hind wing, lighter portions 
of head and abdomen, stone-gray shading toward white. Fore wing more 
produced at apex, and outer margin more convex between SC5 and R3. 
Dark spot at back of fore wing toward the outer margin much reduced. 
Lines of fore wing above more prominent, and more variety in the shading. 
A very narrow stone-gray marginal band runs along the entire outer edge 
of the fore wing and continues a short distance beyond the hinder angle. 
The dark sub-basal band, the dark markings of thorax, and the lunulated 
lines from the costal margin, are chestnut in color instead of the olive color 
of the typical form. Black bands of the hind wing broader and more 
confluent than in A. gannascus. A distinguished-looking insect. 
The two males in the collection of the writer have been compared 
with specimens of gannascus from Costa Rica, Peru, Brazil, Colom- 
bia, Venezuela and Mexico, and the above distinctions appear to 
hold good. 
Amplypterus palmeri brasiliensis subsp. nov. 
Plate IV, figure 3. 
Habitat— Rio de Janeiro, Brazil. Two males in coll. B. Preston Clark, 
given me by my friend, Mr. Jacob Doll, of the Brooklyn Museum. 
As one compares specimens of A. palmeri from southeastern Brazil with 
those from Peru, Ecuador and western Brazil, there appear to be certain 
