American and other Tingitidm. o9 



Aurivillius. The insect has been beautifully figured by 

 A. Costa. The second known species of the genus, G. 

 carinata, Uhler, is from the Island of St. Vincent, and it 

 has also been found in Guatemala by myself 



Pachycysta, gen. n. 



Eostrum reaching the first ventral suture. Rostral groove sub- 

 parallel, uninterrupted, closed in front, the buccal laminae not promi- 

 nent, the meso- and metasternal laminae slightly converging behind. 

 AntenntB 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, oval, anteriorly truncate hood, three 

 foliaceous carinae, 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 

 areolae, 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,Chsim^. ; 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 membranous portions of the 

 pronotum very much closer, &c. It cannot be included in 

 Leptostyla or any of the other genera characterized by StS,l. 



Pachycysta dicqjhana, sp. n. (PL II, figs. 6, 6a.) 



Body ferruginous, the integument testaceous, the areoljE 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 antennae ferruginous. Pronotum with the three carina) 

 strongly foliaceous, each with a row of transverse hyaline areolae, 

 the median carina angularly raised anteriorly, the outer carinae 

 curved inwards and partly covered by the hood ; the hood extending 

 to about the middle, rather closely reticulated ; the membranous 

 shell-like margins rounded externally, with numerous small areolte ; 

 the triangular posterior portion large, and, like the disc, closely 



