136 
MEMBRA Cl DAE. 
He describes twenty-three species, but with such varied characters that Stal 
erected from the group several separate genera, retaining Hemiptycha, Hyphinoe, 
P\rantlie, Proterpia, Euanthe, Alcraeone, and Bubalopa. 
Canon Fowler doubts the sufficiency of this subdivision for present requirements, 
and thinks that the erection of new genera chiefly founded on the position of the 
ocelli, and the amount of the tegmina which appears to be covered by the pronotum, 
are characters too obscure for accurate determination. 
He adds, however, another genus, viz., Ictaranthe, which is represented as yet, 
by only one described species. It appears to approach to Pyranthe with a facies 
somewhat like Ceresa. 
Thus Hemiptycha proper does not enter into the scheme set forth in the Biologia 
Centrali Americana. 
Walker’s list of Homoptera, practically in this respect represents Fairmaire’s 
grouping of these insects. 
Several species are vei^ like Centrotida?, and as such they were formerly described 
by Germar, Burmeister, and others. The scutullum is much covered and concealed 
from view. The restricted genus is here located with the Darninse. 
HEMIPTYCHA PUBESCENS, var? 
Walk. l.c. p. 144, Suppt. 
I note this insect though it may prove to be one of the many varieties of 
llypliinoe asphaltina. Hemiptycha apriformis may be another variety. Walker’s insect 
is described as the male of Hemiptychapubescens. 
The pronotum is covered by a thick pubescence. The tegmina are punctured and 
greyish. 
Habitat. —Mexico. 
HEMIPTYCHA MARGIXATA. 
(Plate XXIX. figs. 2, 2a, 2b.) 
Fab. (Membracis), Mant. Ins. 2, 263, 14. M. sinepsis, German. Stoll. Tab. II. fig. 53, and Tab. 
XVII. fig. 91. M. maculala, 01. l.c. 668, 5. Fairm. l.c. PL VI. figs. 16-17, p. 312. 
Fairmaire calls this a rare species, which old authors believed to be Asiatic. It is, 
perhaps, the largest of the known Membracidte, and it has been described under 
different names. Stoll calls it “ le taureau noir.” Large, rich brown, shining and 
abundantly spotted with small orange dots. Supralateral horns long, acute, and 
reffexed ; dorsal ridge sinuate, and sloped to the acute posterior apex ; pronotum 
covers much of the tegmina, but it can be easily detached, and is then seen to be hollow, 
and apparently filled with air ; irons wide ; the eyes small, ocelli placed near their 
