52 CLARK — THIRTY-THREE NEW SPHINGIDAE [yS'.^lil' 



Fore wing beneath : Light yellow, unicolorous, except for a dot at apex 

 of cell, the replica of that on upper side. Faint replicas also of the three 

 other dots, and of the streak near hinder angle. Distal marginal band light 

 gray, distinct. 



Hind wing beneath: Light yellow, unicolorous, except for a shadow of 

 the anal dot and anal band of the upper side. 



An interesting form. 



Batocnema africanus Distant 



Al. ant. long., 9 , 43 mm. Al. ant. lat., 9 , 17 mm. Marg. ext., 9 , 

 23 mm. 



Habitat. — Central Africa. One female in coll. Mr. J. J. Joicey. 



The female, which, so far as I know, has not been described, 

 reproduces exactly the markings and coloration of the male, 

 except that the under side of both wings is of a darker green 

 tone. 



Oxyambulyx sericeipennis f. aest. brunnea forma nova 



Al. ant. long., cf, 47 mm.; 9, 53 mm. Al. ant. lat., c?\ 17 mm.; 9, 

 20 mm. Marg. ext., d\ 28 mm.; 9 , 32 mm. 



Habitat. — Southeastern China. The types, and a series of males and 

 females in coll. B. Preston Clark, received from Mr. Rudolf Mell. Speci- 

 mens from the same collector also are at Tring and in the Berlin Museum. 



Fore wing above : Ground color sayal-brown (not ash-gray with reddish 

 suffusion, as in the spring). Entire wing more uniform in color, with mark- 

 ings less prominent than in typical sericeipennis. This seems to be the 

 chief difference, and is very marked. The subbasal and discal spots in 

 general are smaller than in the typical form, and sometimes entirely 

 lacking. 



Oxyambulyx brooksi sp. nov. 



Al. ant. long., d\ 54 mm. Al. ant. lat., d\ 20 mm. Marg. ext., d\ 

 30 mm. 



Habitat. — Two males from Lebong district, southwestern Sumatra, 



