74 
Size 5x4 mm. 
Habit at. —Brazil (?). 
Hope Collection (Miers). 
MEMBRA CIDJE. 
PTERYGIA QUADRIDENS, Fairm. 
(Plate XIIT. fig. 1, la.) 
Fairm. l.c. p. 204; Walk. l.c. p. 499 ; Suppl. 127. 
Uniformly black, with divergent antler-like horns, which are spoon-shaped and 
dilated at the tips; dorsum with a central protuberance, succeeded posteriorly by 
a smaller one; whole pronotum covered with small spines; sundry white llannel-like 
spots are dispersed over the body and the tegmina; these last organs are reddish 
in colour and spotted ; tibiae flattened. 
Bates obtained several examples from Ega on the Amazons. These specimens 
are browner in colour, but in general particulars they agree with the other insects in 
the Hope Collection. 
This insect is not P. crassicornis of Brazil, yet neither this nor P. qmdridens are 
described as being powdered or blotched with white. 
Size 7x5 mm. 
Habitats. —Cayenne, Ega and St. Pauls, Amazons. 
PTERYGIA TENUICORNIS, n.s. 
(Plate XIII. fig. 2.) 
In general form not unlike P. tripodia, but the colour is bright ferruginous, and 
the whole body is roughly honeycombed by depressions. The tegmina are grey, and 
the neuration is indistinct; the tibiae large, broad, and spatulate; tarsi very small. 
It is possible that this insect may prove to be the female of P. tripodia. 
Size 7x5 mm. 
Habitat. —Amazons. 
Bates (Hope Collection). 
PTERYGIA TRIPODIA, Fairm. 
(Plate XIII. fig. 4, 3a.) 
Fairm. l.c. plate vii. fig. 30, p. 263; Walk. Pterygia trepida (i misprinted for tripodia), l.c. p. 499. 
Black; pronotal horns slender, straight, or nearly so; tips slightly clavate; 
body covered with fine spines; the dorsal aspect of the pronotum shows one small 
pointed process, and a square-headed process over the posterior end; legs black, with 
