Gibson — The Genera Corythaica and Dolichocysta. 101 



viewed from above, raised anteriorly. Lateral membranous margins 

 biseriate, rounding and narrow. Carinae nearly parallel, the median one 

 much higher than the lateral ones. Elytra with one row of areoles in costal 

 area, subcostal and discoidal each with three rows. Veins of elytra dark, 

 giving the insect a generally dark appearance. Areoles at apex of elytra 

 clouded with brown also the second areole of costal area in front clouded 

 apical areoles darkened. Also two areoles clouded in costal area opposite 

 apex of pronotum. Legs and antennae concolorous, yellowish brown. 

 Insect chestnut brown beneath. 



Several specimens in U. S. National Museum from the West Indies; one 

 specimen from Texas. The species is also known to occur in Central 

 America. 



One specimen bears the food plant label of eggplant. 



The Genus Dolichocysta Champion. 



Dolichocysta was described by Champion in 1898 for his venusta, which 

 is the type of the genus. The genus now consists of four species, two of 

 which are herein described as new and one, constricta Osb. and Drake, is 

 transferred from the genus Corythaica within which genus it was originally 

 described. Practically nothing is known of the economic importance of 

 any of the species. 



The distribution of the species may be listed as follows: 

 Central Western United States — constricta Osb. & Dr., magna Gibson. 

 South Western United States — venusta Champ. 

 Southern United States — densata Gibson. 



Dolichocysta Champion. 



1898 — Champion, Trans. Ent. Soc. Lond., p. 56. 

 1917— Drake, Ohio Jr. Science, xvii, No. 6, p. 214. 



Closely related to Corythaica. In general form more compact. Head 

 moderately long with rostral sulcus closed in front. Antennae moderately 

 long, first segment stout and longer than the second, third very long, fourth 

 about as long as first two taken together and prominently swollen. Pro- 

 notum with a large hood, long, extending beyond the head, and three 

 membranous nearly parallel carinae. Lateral margins of pronotum flaring, 

 membranous. Elytra with a prominent bulbous elevation near the middle, 

 along the carinae which separates the subcostal and costal areas. Species 

 may be represented by both long- and short- winged forms. 



Key to the Species. 



1. Costal area of elytra with one row of areoles 



constricta Osb. & Dr. 

 Costal area of elytra with at least two rows of areoles 2. 



2. Elevation on elytra appearing as tho flattened as viewed 



from above venusta Champ. 



Elevation on elytra not appearing flattened, acute or well rounded.... 3. 



