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MEMBRA ClDJE. 
the Philippine Isles, Celebes, Malacca, Borneo, Sierra Leone, Calabar and Caffraria. 
11 we admit Centrotoides amongst the Campylocentridse we must consider the genus 
as a ubiquitous form of Membracidse. 
Curtis has given a detailed anatomy of Centrotus cornutus. Fairmaire discovered 
the nymph feeding on the oak, and he says that it is quite different from the perfect 
insect. The prothorax is compressed but without horns, and the abdomen carries 
“ a l’extremite un appendice dont l’usage rn’est inconnu.” 
The old genus is in this monograph restricted to a few species of somewhat 
doubtful position, amongst which I name the next described. The student is 
referred to Plate LX., figs. 5, G, and 7 at the end of these diagnoses, where some of 
these last insects are drawn. 
CENTROTUS NECTARIS, n.s. 
(Plate LVIII. figs. 4, 4a, 4b.) 
Colour sordid ochreous yellow. Pronotum with two short suprahumeral horns, 
otherwise unarmed. Dorsal outline straight, apex of posterior horn extending to the 
tips of the tegmina. Tegmina hyaline and coarsely veined with yellow. Frons 
broad, with small black eyes. Legs stout, tibiae broad, tarsi longish, particularly the 
hind ones. 
The pupae are smaller than the imagoes, with a broad but short overhanging 
pronotum and an obtuse hump. Wing-cases obvious. Abdomen stout and deeply 
ringed, the extremity ending in a conical process like a nectary, from which the insect 
at will can protrude a long taper tube, which is tipped with crimson red. This tube 
discharges a liquid which is greedily sought by certain large ants, many of which were 
observed to gather it, much in the same manner as they so do from Aphides. These 
observations, made by Mr. E. Green, establish Bates’ statement that certain species of 
Membracidse are attended by ants for their sweet secretion, but which had been 
before doubted by some. The larvte of Centrotus nectaris are gregarious, and they 
commonly affect the shoots of succulent plants. Through the courtesy of Mr. Ernest 
Green I am enabled to describe this species, and other of Centrotidm, with examples 
of which he has furnished me* 
Mr. Green observes that these insects can leap to a considerable distance, but can 
be, nevertheless, easily caught between the finger and the thumb. 
They feed on several leguminous plants and trees, as Adenanthera and Albizzia, 
* See also E. E, Green on the extensile organ of the larva of a Centrotus, Ent. Mag. for January 
1901. Also the same author on the attractive properties of certain larval Hemiptera, Ent. Month. 
Mag. for August 1900, p. 185. 
