MEMBRACIDH. 
93 
humerals brown, with distinct carinse ; tips of the horns slightly recurved ; underside 
fuscous ; frons wide and transversely narrow ; legs yellow. 
Size, 11 x 5 mm. 
Habitat. —Bogota. 
MICROSCHEMA INERMIS, Fairm. 
(Plate XVIII. figs. 6, Ga, Gb.) 
Triquetra inermis, Fairm. l.c. p. 280. 
Clear yellow, sparsely punctured ; pronotum without either a cephalic or dorsal 
horn ; a strong black streak down the centre ; edges of pronotum also dark ; tegmina 
with long radials, the areas of which are cut up by faint transverse nervures; legs 
slender; suprahumeral horns divergent and rather short; often a dark spot occurs 
above the le^s. 
Size, 13 x 6 mm. 
Habitat. —Bolivia. 
MICROSCHEMA BOS. 
Triquetra bos, Fairm. l.c, p. 282. 
Large ; shining, much punctured ; colour ochreous-yellow, probably greener in 
life. Pronotum raised perpendicularly from the frons and thence forming an obtuse 
angle on the dorsum and descending to the apex, rather short of the tips of the 
tegmina; lower margin carinated; supra-humerals by front view seen as two 
stout divergent horns ; there is no dorsal spine ; tegmina with yellow transverse 
nervures enclosing areas not cycloidal in form. This character separates the present 
genus from Ceresa, with which it might be confounded. Legs rather stout. Tegmina 
more or less crinkled, and catching the light in patches. 
Size, 13 x 7 mm. 
Habitat. —Bogota. 
Although my description is taken from a considerably larger insect than that 
given by Fairmaire, it will be well to mark this character of size only as a variation 
from the normal species. 
The collection in the British Museum may be consulted for the following species, 
which are not included in this Monograph: 
Triquetra virescens, Fairm. l.c. p. 281. Venezuela. 
T. ustulata, Fairm. l.c. p. 281. 
T. truncaticornis, Germ. l.c. p. 244. Brazil. 
T. obscura, Walk. (Umbonia) l.c. p. 517. 
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