18 IOWA STUDIES IN NATURAL HISTORY 
following islands: Cuba, Guadeloupe, Antigua, Grenada, San 
Domingo, and Porto Rico. In the United States it oceurs in 
Florida, Texas, and southern California. 
Coreocoris fusca Thunberg 
1783. Corecoris fusca Thunberg, Nov. Ins. Sp., II, 44. 
1832. Coreus confluentus Say, Het. N. Harm. Ind., 11. 
Sagotylus confluentus (Uhler, Distant, L. and S. Cat., not Say.) 
1852. #? Spartocera alternata Dallas, List, II, 374. 
Six adults and twenty-six nymphs from Antigua. A common 
species within its recorded range from Argentine Republic on 
the south to Mexico, West Indies, and the southern United 
States. Having such a wide range it is naturally subject to 
considerable color variation, as remarked by Stal. Lethierry in 
1881, recorded Spartocera alternata Dallas, originally described 
from Brazil, as occurring in Guadeloupe and Martinique. As 
Dallas’ description corresponds almost exactly to certain darker 
forms of fusca there is little doubt in my mind that the two 
refer to the same species. Although the species known as con- 
fluenta Say from the southern United States is paler and the 
males have the posterior margin of the genital segment a little 
more deeply sinuate, I can find no structural differences which 
will serve to separate this as a distinet species. Say’s diffusus 
from North Carolina is quite distinct from fusca Thunb. 
C. batatas Fab. is also common throughout the West Indies, 
although none were secured by the Iowa Expedition. This 
latter species was named by Uhler as fusca from Grenada and 
St. Vincent according to Distant, who has seen the identical 
specimens. 
C. fusca has been recorded from Cuba, St. Bartholomew, St. 
Vincent, Grenada, Guadeloupe, Martinique, and Porto Rico. I 
have also seen specimens from Jamaica and Dominica in the 
collections of the American Museum of Natural History. 
Chariesterus gracilicornis Stal 
1870. Chariesterus gracilicornis Stal, Enum. Hem., I, 178. 
Twenty-three specimens from Antigua. Occurs throughout 
the West Indies, having been recorded from St. Eustatius, Cuba, 
Porto Rico, Jamaica, and Isle of Pines. I have seen specimens 
