MEMBRA ClDJE. 
169 
Roughly the group may be divided into species which have slender horns 
proceeding from the shoulders, and into those which show them stouter and somewhat 
curved. The group is not easy, satisfactorily to diagnose. 
Stiil and others form certain allied genera from the wing neuration, but it is not 
easy to decide as to which should be counted the discoidal, and which are the basal 
cellules. Ceresa is described as having five apical and three discoidal areas. 
Stictocephala and Centrogonia externally show little differences from Ceresa ; and are 
separated from it chiefly by neuration of the tegmina, if coloration be disregarded in 
the classification of these Homoptera. 
CERESA AXILLARIS, Fairm. 
(Plate XXXV. figs. 1, la.) 
Fairm. l.c. p. 285. Germ. (Smilia). C. terminata, Walk. l.c. p. 531. C. terminata, Fairm. l.c. 
p. 287. 
Rather large; very shining in colour, like that of the carnelian-stone ; lower 
margin of pronotum paler; finely pubescent; suprahumerals divergent and at right 
angles to the dorsal ridge, and when seen from the back triangular in shape; hind¬ 
legs long and pilose ; tegmina pale ochreous and shining hirsute; neuration coarsely 
rhomboidal, and raised above the membrane. This insect approximates to Fairmaire’s 
description of C. axillaris, but it certainly is larger than 9 mm.—the measurement 
given by him. 
From the B.M. Collection. 
Size, 11x6 mm. 
Habitat. —Amazons, Brazil. 
CERESA DICEROS. 
(Plate XXXY. figs. 2, 2a, $ , 3, 3a, <$.) 
Fairm. l.c. p. 285. Smilia diceros, Germ. C. post fasciata, Amyot, PI. X. fig. 3. Walk. l.c. p. 527 
Shining sordid brown or ochreous ; pronotum with an obscure dark band near the 
dorsum, and another near the hinder apex; frons rufous with the metopidium 
perpendicular; finely hirsute, the hairs extending in the male over the dorsum. 
Size, 9 x 5 mm. 
Habitat. —Nova Scotia, New York. 
This insect resembles C. nitidalis, but it is stouter as to the suprahumeral horns, 
and is redder in front; it also is larger. It is said to be infested with the parasite 
Leptus hispidus of Say. The insect is not included in the B.C.A.; perhaps its range 
is too far north. 
Figured from the B.M. 
The female is drawn from an example collected by Heyne, though I have 
specimens from New York from the Wollaston Collection ; but these are not pilose. 
