248 NOVITATES ZOOLOGICAE XXIII. 1916. 



the anal angle smaller in ferax than in natalensis. — —On the hindwing the onter 

 black bar within the greyish white anal area and the black spots placed outside 

 this bar larger, so that the marginal portion of the grey area is reduced to spots or 

 entirely replaced by black. 



The underside on the whole is darker than in P. n. natalensis, and the external 

 band is less dentate on both wings. 



2. Poliana buchholzi Plötz (1880) 



The East African form of this species has been described by E. Strand as 

 Taboribia ivintgensi nov. gen. et nov. spec, in Ann. Soc. Ent. Belg. 54, p. 228 

 (1910). A paratype (?) of this ivintgensi, from the Wichgraf collection, is now in 

 the collection of Mr. J. J. Joicey, to whom we are indebted for the loan of it. The 

 specimen came from German East Africa, and agrees with some examples from 

 British East Africa contained in the British Museum. All these specimens are 

 smaller than West African buchholzi. 



Poliana marmorata Fawc. (1915), from British East Africa, is the same as 

 ivintgensi. The type, and only specimen, is a c?, which its discoverer, W. Feather, 

 has very kindly transferred to the Tring Museum. 



As buchholzi is the genotype of Poliana, Strand's name of Taboribia sinks into 

 synonymy. The name of the East African subspecies therefore is : 



Poliana buchholzi wintgensi Strand (1910) 



Poliana marmorata Fawcett, Proc. Zool. Soc. Lond. 1915. p. 105, no. 85. pi. 2. fig. 22 

 (Masongaleni, Brit. E. A.). 



Lt.-Colonel Fawcett's remark under P. marmorata, I.e. p. 106, that there is a 

 figure of Poliana buchholzi Plötz, from West Africa, in the Dublin Museum, 

 probably rests on a misunderstanding. 



3. Protoparce clarki spec. nov. (text-figs. 1 and 2) 



$. P. perplexa R. & J. (1910) similis, minor, thoracis et alarum partibus 

 pallidis grisescentibus, pedibns nigris albo irroratis, alis posticis subtus fascia media 

 nigra e tribus lineis composita, armatura sexuali diversa. 



Al. ant. long. 41-48 mm. 



Hab. Fonteboa, Upper Amazon, May 1906 (S. M. Klages), one c?, type; 

 ? Chanchainayo, Pern, one <$; another <? in coll. Preston Clark (Boston), from 

 Ecuador. 



The specimen kindly lent us by Mr. B. Preston Clark enables us to verify the 

 distinctions presented by our examples, and we have much pleasure in naming this 

 interesting species in his honour. Mr. B. Preston Clark's collection of Sphingidae 

 is the largest in America. 



P. clarki is a near relative of P. perplexa R. & J. (1910), P. scutata R. & J. 

 (1903), and P. pellenia H.-S. (1854), agreeing best with perplexa. Its size being 

 smaller and the pale portions of the thorax and wings grey without a distinct 

 yellowish buff' tone, the species has a rather different appearance from its allies. 



The antenna is slightly thinner than in P. perplexa, and much thinner than in 

 P. scutata and P. pellenia. The frons is nearly as black as the occiput. The first 

 segment of the palpus has a white ventral margin. The white dorsal spots of the 

 abdomen are vestigia] or diffuse, and the seventh segment has no yellow side-patch ; 



