Bae 
106 CLARK — SOME UNDESCRIBED SPHINGIDAE Vol VI 
Isognathus rimosa brasiliensis subsp. nov. 
Plate XII, figure 1. 
Al. ant. long., o, 40 to 42 mm. AI. ant. lat., 7, 15 to 16mm. Marg. 
ext., o’, 22 to 23 mm. 
Habitat. — Mogy Forest, Sao Paulo (E. May); Rio de Janeiro, Brazil. 
Two males in coll. B. Preston Clark. 
This form is very close to J. rimosa papayae. The fore wing above, how- 
ever, is less strongly marked, and more uniformly gray. The ground tone 
is not white. The second discal line on under side of hind wing is less promi- 
nent than in papayae, and there are traces of the first discal line. The ab- 
dominal bands are less distinct than in the other forms of this species. 
Isognathus mossi sp. nov. 
Plate XII, figure 2. 
Al. ant. long., o', 36 mm.; 9, 41 mm. AI. ant. lat., ¢, 15 mm.; 9, 
17mm. Marg. ext., o',20mm.; 9, 22 mm. 
Habitat. — Manaos, Brazil. Two males and one female in coll. B. Pres- 
ton Clark. Named for my friend, Rev. A. Miles Moss, who collected them 
and presented them to me. He raised them from the larvae, which he 
caught on the bank of the Amazon River. 
A clearly marked and very beautiful species, resembling most nearly 
I. menechus, but with the thorax, abdomen above and beneath, ground color 
of both fore wing and hind wing, above and beneath, all much darker in 
tone. 
Antennae brown above, white beneath. Palpus warm brown, irrorated 
with white. Occiput, thorax and abdomen above, brown-gray, slightly irro- 
rated with white. Abdominal bands black, distinct. . 
Fore wing above: Brown-gray, irrorated with white, uniform in tint. 
Geminate basal dots gray, inconspicuous. Antemedian pair of transverse 
black lines disappearing before they reach the inner margin. Three black 
antemedian spots, 1 mm. in diameter, and three postmedian spots of the 
same size, all on costal margin, the three latter extended in wavy lines which 
approach one another on R1. The black half-ring of J. menechus is present, 
though less prominent. White discal vein dots barely noticeable. 
