a 
DICYSTA.—MEGALOCYSTA. 5 
Group TINGITINI. 
DICYSTA, n. gen. 
Rostrum reaching the end of the metasternum. Rostral groove broad and subparallel beyond the front coxe, 
uninterrupted, closed in front, the sternal and buccal lamine prominent. Antennz glabrous, distant at 
the base, long and slender, joint 1 slightly thickened and twice as long as 2, 3 very elongate (4 broken 
off). Head with a short, obtuse frontal spine. Pronotum with greatly dilated, concave, reflexed, membra- 
nous margins, these being subvertical, shell-like, and rounded; hood oval, exceedingly large, completely 
covering the head, and connected posteriorly by the strongly foliaceous median carina with an equally 
large bladder-like process arising from the triangular posterior portion of the pronotum, the posterior 
process abruptly truncate in front, the margins and processes widely reticulated. Elytra entirely hyaline, 
twice as long as the abdomen, obliquely widening at the base, parallel from about the basal third to the 
rounded tip, the apical margin oblique; discoidal area about reaching the middle, curved and sharply 
raised externally, becoming more inflated behind ; costal area broad ; median nervure strongly sinuous ; 
reticulation wide and subequal. Orifice not visible. Legs slender. 
The single species referred to this genus resembles the most exaggerated forms of 
Leptostyla in the form of the pronotum, except that the foliaceous median carina is 
developed behind into avery large bladder-like process, similar to the hood in size and 
shape, this character also separating it from Stephanitis, Corythucha, &c. ‘There is no 
trace of outer carine on the pronotum. ‘The wings are short. 
1. Dicysta vitrea, n. sp. (Tab. I. figg. 4; 4a, profile.) 
Moderately elongate, broad, glabrous ; body testaceous, darker beneath, the membranous integument hyaline, 
with the nervures brown, those on the crest of the pronotal processes obscure fuscous, the elytra with a 
faint transverse fuscous fascia on the costal area at about one-third from the base, the tips of the tibie 
and the tarsi slightly infuscate; the whole of the reticulation wide. LElytra broader than the pronotum ; 
discoidal area with three, the subcostal area with two, rows of areole; costal area with four rows of 
areole at the middle, diminishing to two at the base. 
Length 32, breadth 2 millim. (d.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
One example. 
MEGALOCYSTA, n. gen. 
Rostrum extending to the first ventral suture, or to a little beyond it. Rostral groove parallel behind the 
front cox, uninterrupted, closed in front, the sternal lamin moderately prominent, the buccal lamine 
long and very prominent. Antenne distant at the base, inserted in deep cavities, long and slender, 
joint 1 stout, nearly twice as long as 2, 2 very short, 3 very elongate, obliquely truncate at the apex, 
4 much longer than 1 and 2 united, articulated to the preceding on the lower side just before the apex, 
1-3 smooth and almost glabrous, 4 pilose. Head with very short frontal spines. Pronotum with 
moderately broad, widely reticulated membranous margins; hood oval, enormously large and inflated, 
slightly constricted at the middle, covering the base of the head and extending halfway across the 
elongate-triangular posterior portion of the pronotum, the latter carinate down the centre. LElytra 
hyaline, extending to far beyond the abdomen, gradually widening to the basal third, the costal margin 
hollowed at the middle, the apex bluntly rounded; discoidal area nearly reaching the middle, raised 
externally ; subcostal area narrow; costal area moderately broad; median nervure prominent and 
