100 Proceedings of the Biological Society of Washington. 



elytra with one row of areoles, subcostal with three, and discoidal four at 

 its widest part. General color of insect light brown, no definite color mark- 

 ings, elytra more or less mottled with darker brown. Antennae and legs 

 light yellowish brown, unicolorous. Body dark beneath. Length 2.6 mm. 

 male. 



Type d\ Santa Clara, Peru. Collected from cotton by Mr. C. H. T. Town- 

 send. Paratype 9 , same data as type. Both in the collection of the U. S. 

 National Museum. Type No. 22,291. 



Corythaica acuta Drake. 

 1917— Drake, Ohio Jr. Science, xviii, No. 6, p. 214 (Dolichocysta) . 



Pronotal hood comparatively broad at base with areoles smaller than 

 in costata. Carinae, wavy and nearly of the same height. Membranous 

 margins angular as viewed from above, because of the anterior portion 

 being renexed. Elytra with one row of areoles in costal area and subcostal 

 area with four or five rows at its widest part, Discoidal area narrower than 

 subcostal and long. Membranous portions white, somewhat mottled but 

 not as much so as in costata. Antennae and legs concolorous and darker 

 than membranous portions altho of a light yellowish brown. Body dark 

 beneath. 



Drake gives its distribution as Colorado and Montana. A paratype 

 from Colorado is in the Collection of the U. S. National Museum. 



Drake describes this as a new species of the genus Dolichocysta Champ. 

 As it lacks the bulbous elevation on the elytra and is of the narrow type the 

 writer considers it properly transferred to Corythaica. 



Corythaica bellula Bueno. 

 1917— Bueno, Bull. Brooklyn Ent. Soc, xii, p. 19. 



Pronotal hood evenly conical as viewed from above and more acute than 

 in other species, areoles very prominent. Carinae straight, not wavy, 

 lateral carinae fartherest apart at the middle. Lateral membranous margins 

 biseriate, narrow and rounding. Pronotum a chestnut brown, membranous 

 portions light with veins of the hood much darkened, median vein nearly 

 black. 



Elytra with a single row of areoles in costal area, five rows in subcostal, 

 and three rows in discoidal area. Veins much darkened, some appearing 

 black. Antennae and legs concolorous, yellowish. Insect chestnut brown 

 beneath. 



The only locality from which this species has been collected is White 

 Plains, N. Y. Several specimens are in the collection of the U. S. National 

 Museum. 



Corythaica carinata Uhler. 



1894— Uhler, Proc. Zool. Soc. Lond., p. 203. 

 1901 — Champion, Biol. Centr. Amer., ii, p. 9. 



Pronotal hood long extending for one-half its length beyond the eyes as 



