American and other Tingitide. 59 
Aurivillius. The insect has been beautifully figured by 
A. Costa. The second known species of the genus, C. 
carinata, Uhler, is from the Island of St. Vincent, and it 
has also been found in Guatemala by myself. 
PACHYCYSTA, gen. n. 
Rostrum reaching the first ventral suture. Rostral groove sub- 
parallel, uninterrupted, closed in front, the buccal laminze not promi- 
nent, the meso- and metasternal lamine slightly converging behind. 
Antenne pilose, distant at the base, with moderately long, slender 
joints, 1 and 2 stouter than 3, 1 a little longer than 2, (4 broken off) 
Head with five short decumbent spines, very short, obtuse antenni- 
ferous tubercles, and an oblong, smooth, convex prominence in front. 
Pronotum with a very large, ova], anteriorly truncate hood, three 
foliaceous caring, and very broad, shell-like, incurved membranous 
margins. Elytra oval, rounded at the tip; discoidal and subcostal 
areas closely, the costal and sutural areas more widely, reticulated, 
the costal area very broad, with three or fours rows of hyaline 
areolee, the discoidal area extending to the middle and surrounded 
by prominent nervures. Orifice visible. Nervures of the pronotal 
processes and elytra stout, thickly pilose. 
The single species from which the above characters are 
taken is perhaps nearest allied to the monotypic genus 
Megalocysta, Champ. ; but differs from it in having the pro- 
notum strongly tricarinate, with the membranous margins 
greatly extended, vertical, ‘and shell- like, and the reticula- 
tion of the elytra and of ‘the inembranous portions of the 
pronotum very much closer, &e. It cannot be included in 
Leptostyla or any of the other genera characterized by Stal. 
Pachycysta diaphana, sp. n. (Pl. I, figs. 6, 6a.) 
Body ferruginous, the integument testaceous, the areole of the 
elytra and pronotal processes more or less hyaline, the nervures and 
the costal margin thickly clothed with very short pallid hairs ; 
the legs and antennz ferruginous. Pronotum with the three carinz 
strongly foliaceous, each with a row of transverse hyaline areole, 
the median carina angularly raised anteriorly, the outer carine 
curved inwards and partly covered by the hood; the hood extending 
to about the middle, rather closely veticulated ; the membranous 
shell-like margins rounded externally, with numerous small areole ; 
the triangular posterior portion large, and, like the disc, closely 
