68 CLARK — THIRTY-THREE NEW SPHINGIDAE Pvol'*Vli?' 



This East African form of T. cajus Cr. differs markedly both 

 from it and from T. cajus perkeo R. and J. Its general facies 

 is fairly close to T. cajus, while in size it approximates closely 

 to T. cajus perkeo. 



Antennae, thorax, and abdomen above and beneath dark brown, shad- 

 ing to black, the silvery markings dull in tone. 



Fore wing above and beneath: Ground tone dark brown, shading to 

 black. Silvery markings similar to those of T. cajus, but duller in tone. 



Hind wing above: Uniformly black, save for a faint submarginal band 

 extending from anal angle to R3, where it becomes obscure. 



Hind wing beneath: Dark brown; bands darker in tone than in the 

 other forms. 



Hippotion noel sp. nov. 



Al. ant. long., cf, 27 mm.; 9, 34 mm. Al. ant. lat., d\ 10.5 mm.; 

 9,12.5 mm. Marg. ext., cf, 14 mm.; 9,18 mm. 



Habitat. — Christmas Island. One male and one female (types) in coll. 

 J. J. Joicey, at the Hill Museum. Cotypes in coll. B. Preston Clark. All 

 collected by C. W. Andrews in September and October, 1897. 



This form has the facies of H. velox Fabr. It lacks, however, 

 the silvery lines and markings of the fore wing above and of the 

 abdomen above. It has the more uniform coloration of H. 

 beddoesii Clark, but lacking the darker markings of that form, 

 is a more unicolorous insect. All the specimens of this form are 

 so uniform in their characters, and differ so widely from typical 

 H. velox, that it seems to deserve specific separation. 



Hippotion lambertoni sp. nov. 



Al. ant. long., d", 27 mm. Al. ant. lat., cf, 12 mm. Marg. ext., d% 

 11 mm. 



Habitat. — Farafangana, southeastern Madagascar. One male in coll. 

 B. Preston Clark, collected by Mr. C. Lamberton. 



