Gibson — The Genera Corythaica and Dolichocysta. 99 



Key to the Species. 



1. Lateral margins of pronotum wide and angular 2. 



Lateral margins of pronotum always rounded and usually narrow 4. 



2. Costal area of elytra with two rows of areoles at its widest 



part monacha Stal. 



Costal area of elytra with but one row of areoles at its widest 



part 3. 



3. Subcostal area of elytra with but three rows of areoles at its 



widest part costata n. sp. 



Subcostal area of elytra with four or five rows of areoles at its 

 widest part acuta Drake. 



4. Subcostal area of elytra noticeably wider than discoidal area 



as viewed from above. Areoles of elytra not clouded, veins 



very dark bellula Bueno. 



Subcostal and discoidal areas about equal in width as viewed 

 from above. Numerous areoles of elytra clouded, veins 

 not so dark ....carinata Uhler. 



Corythaica monacha Stal. 



1860 — Stal, Rio Hem., i, p. 64 (Tingis monacha). 



1864 — Costa, Ann. Mus. Zool., ii, p. 146 {Tingis cyathicollis) . 



1873— Stal, Enum. Hem., iii, p. 128 (Corythaica monacha). 



1893 — Uhler, Proc. Zool. Soc. Lond., p. 716 (Typonotus planaris). 



1917— Cotton, Jr. Dept. Agric, Porto Rico, 1, No. 3, pp. 170-173. 



Pronotal hood curving downward in front of head, evenly narrowed 

 toward apex as viewed from above. The pronotal carinae high with a 

 distinct row of areoles and more or less wavy. Median carina higher and 

 longer than hood. Membranous margins of pronotum distinctly angular 

 and reflexed anteriorly, flaring and wide. Elytra entirely areolate, numer- 

 ous areoles being clouded. Costal area with two rows of areoles at its 

 widest part, subcostal with two or three, and discoidal with three. Body 

 beneath brown. Legs light yellowish brown. General appearance light. 

 Intensity of color varies greatly. Only long-winged forms are known to 

 the writer. 



Uhler's type specimen of Typonotus planaris is in the collection of the 

 U. S. National Museum. Numerous specimens from St. Vincent Island, 

 Porto Rico, and Grenada have been examined. Labels on various speci- 

 mens indicate that they have been collected from Solanum torvum, Solarium 

 mdongena, and Ricinus communis. 



The biology of this lace-bug is treated by Mr. R. T. Cotton in the 

 Journal of the Dept. of Agriculture of Porto Rico, for July, 1917. 



Corythaica costata, n. sp. 



Pronotal hood comparatively wide at base. Median carina high, lateral 

 carinae widening anteriorly, otherwise parallel. Membranous margins of 

 pronotum appearing angular as viewed from above, wide. Costal area of 



