54 CLARK — THIRTY-THREE NEW SPHINGIDAE [^ol'.^IH ' 



child and Jordan, Lord Rothschild's rosacea was reduced to 

 synonymy (p. 519), I believe it to be valid. 



As I compare my one example of the Fiji form with that from 

 Lifu, also but one example, the Lifu form is far lighter in general 

 tone, justifying the name ' rosacea.' This is true of the fore 

 and hind wings, above and beneath. 



The dark triangular area which in the Fiji insect extends from 

 the wing tip along the distal margin to Rl, in the Lifu form con- 

 tinues faintly to R3. The wing tip of the fore wing in the Lifu 

 form is more acuminate, and the distal margin more concave' 

 between the wing tip and R2. 



Another marked difference between the Fiji and the Lifu 

 forms is in the basal half of the fore wing beneath. In the Fiji 

 insect it is black except along the costal margin. The Lifu form 

 has no such black area, while the typical D. placida placida 

 Walker has this basal area but slightly darkened. 



Marumba dyras plana subsp. nov. 



Al. ant. long., cf, 35 mm.; 9, 35 mm. Al. ant. lat., 6", 15 mm.; 9, 

 15 mm. Marg. ext., cf, 20 mm.; 9 , 20 mm. 



Habitat. - — Lo-tan-san, southeastern China. Two males and one female, 

 including the types, in coll. B. Preston Clark; received from Mr. Rudolf 

 Mell. There also are specimens at Tring and in the Berlin Museum. 



This form is of the rainy season of the Plains. It is conspicu- 

 ously pale, almost of the color of sand, between cartridge-buff 

 and cream-buff, and pinkish buff up to chamois. The markings 

 on the upper and lower sides of both wings are paler and smaller. 



Isognathus zebra sp. nov. 



Al. ant. long., d", 40 mm.; 9, 42 mm. Al. ant. lat., <?, 15 mm.; 9, 

 17 mm. Marg. ext., c?, 21 mm.; 9 , 22 mm. 



Habitat. — Para, Brazil. Two males and one female in coll. B. Preston 



