270 Annals of the Carnegie Museum. 



Key to the Si-EciES of Dicysta, 



1. Median carina strongly raised and areolate between its inflated posterior 



process and the hood, connected with the latter a little below the crest ; 



costal area with three or more rows of areolae at its widest part 2. 



la. Median carina neither foliaceous nor areolate between its inflated pos- 

 terior process and the hood, connected with the latter at the base ; costal 

 area moderately wide, biseriate D. smithi n. sp. (No. 4). 



2. Paranota moderately wide, only slightly reflexed, biseriate ; elytra with 



rather small tumid elevations, the lateral margins diverging posteriorly to 



the rounded tips D. brasiliensis n. sp. (No. 3). 



2a. Paranota very wide, strongly reflexed, with four or five rows of areolae ; 

 elytra with large tumid elevations, the lateral margins from about the 

 basal third to the rounded tips, nearly parallel on posterior two-thirds. . .3. 



3. Paranota shell-shaped, very strongly recurved, the under surface of the 



distal row of areolae visible above D. vitrea Champion (No. i). 



3a. Paranota with the anterior and posterior margins very strongly recurved; 

 the lateral margins not recurved at all (see fig. i, a and b). 



D. hollandi n. sp. (No. 2). 



I. Dicysta vitrea Champion. 



Dicysta vitrea Champion, Biol. Centr.-Amer., Hemipt.-Heteropt., vol. II, 1897, 

 p. 5, PI. I, figs. 4.' 4a. 



The type of this species, collected at Volcan de Chiriqtii, Brazil, is 

 figttred and described by Champion in the Biologia Centrali-Ameri- 

 cana. The species is closely related to D. hollandi n. sp., but readily 

 separated from it by the structures mentioned in the key. The speci- 

 mens at hand, collected by Mr. and Mrs. H. H. Smith during July, 

 August, and October at Chapada, Brazil, differ slightly from the 

 original description. The metasternal orifice is usually visible. The 

 subcostal area has three rows of areolae at its widest part. In all 

 specimens before me the head has three obtuse frontal spines, but 

 they are variable in size and not very prominent in a couple of the 

 specimens. According to the original description the type has only a 

 median obtuse frontal spine, the subcostal area two rows of areolae 

 and the metasternal orifices are not visible. The fourth segment of 

 the antennae is slightly swollen, brownish, clothed with a few hairs, 

 and about one-half as long as the third. 



