Excerpt from The Journal of Botany, Vol. 53: British and Foreign
The remarks which I wish to make upon the Aristolochias of Para necessitate a short entomological introduction, for it was in my search for caterpillars that I was led to bestow attention upon this particularly interesting genus.
Comparatively little beyond their association with certain kinds of food plants is known of the majority of species of the large lepidopterous genus Papilio inhabiting the American continent. One great division of this genus, representing sixty or more species, bears the distinctive title "Aristolochia Swallowtails," for, with certain observed preferences on the part of the butterflies for particular species of Aristolochia, it is the leaves, stems and seed capsules of these plants which are employed as the exclusive pabulum of their larv?. There are at least twelve Aristolochia Papilios in the immediate vicinity of Para, which, during a sojourn of fourteen months, provided me with a highly interesting field of research in the exploration of their earlier stages. The result of this work awaits publication in the Novitates Zoologica of the Tring Museum, and in regard to the plants I was careful to press and preserve samples of each species which I encountered for future identification. I could only discover the flowers of seven out of some nine or ten species, so that the identity of the remainder cannot yet be fixed with any certainty.
On my return to England in June, 1913, I presented my dried plants to the Botanical Department of the British Museum. These claimed the immediate attention of Mr. Spencer Moore, who informed me that only three species had been recorded in the Flora Brasiliensis for this part of Brazil. His investigation of all the material I have been able to put at his disposal has shown three known species - A. longecaudata, A. Burchellii and A. trilobata, four new species hereinafter described, and two (or possibly three) species, of which leaves only have been found.
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