''Macroglossum castaneum'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of ...

of the family

Sphingidae The Sphingidae are a family of moths ( Lepidoptera) called sphinx moths, also colloquially known as hawk moths, with many of their caterpillars known as “hornworms”; it includes about 1,450 species. It is best represented in the tropics, ...

. It is known from the

Solomon Islands Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its ca ...

. The upperside is generally brownish black, but the head and anterior part of the thorax are olive green, and the posterior abdominal segments are somewhat chestnut. The abdomen has two restricted yellow side patches. The palpus underside is grey and much speckled with brown. The thorax underside is olive green and the abdomen underside is burnt-umber. The side tufts have white tips. The forewing upperside is brownish black with indistinct markings except the grey border of the postdiscal line, which is not interrupted. Both wing undersides are bright chestnut, with distinct brown distal borders and yellow bases. The hindwing underside has a yellow inner area which is quite sharply defined.

References

Macroglossum Moths described in 1903 Taxa named by Walter Rothschild Taxa named by Karl Jordan Moths of Oceania {{Macroglossum-stub