10 IOWA STUDIES IN NATURAL HISTORY 
this paper the number of families of Homoptera and Heteroptera 
occurring in the state is mentioned as well as the number of 
genera and species in each family. Twenty-one families are 
listed for the Heteroptera. Of the Scutelleroidea, the number of 
genera and species in each family is indicated as follows: 
Scutellersdaes. 3.055 Vie ee 2 genera 2 species 
Thy reOcoriGaees «0-5 1 genus 3 species 
Cy @nidae. 272422 Ae ee 2 genera 2 species 
Pentatomidaes =n ee 17 genera 26 species 
TNotaly newer caine eee 22 genera 33 species 
Proc. Ia. Acad. Sei., Vol. I, Part II, 1892, pages 120-131, Her- 
bert Osborn, ‘‘Catalogue of the Hemiptera of Iowa.’’ In this 
paper the number of the Scutelleroidea recorded from the state is 
raised to thirty-seven. They are distributed among the families 
as follows: 
Scutelleridde. ..ihoss te cece es aa hee eee 2 species 
Dhyreocoridae ss. 2a. ee eee 3 species 
Cy.dnidae: 2) 5..05 25 ok a eee ee 3 species 
Pentatomidae i. ..tse sinc es a ee 29 species 
Localities and abundance only are given. 
Proce. Ia. Acad. Sei., Vol. I, Part IV, 1894, pages 120-123, 
Herbert Osborn, ‘‘ Notes on the Distribution of Hemiptera.’’ At 
this time an additional species (Hurygaster alternatus Say) was 
recorded for Iowa, thus raising the number of recorded Iowa 
species of pentatomids to thirty-eight. Little more than locality 
records for this species and for other species before recorded are 
given. Twenty-nine species of pentatomids are mentioned in the 
paper but most are listed from other states. 
Proc. Ia. Acad. Sei., Vol. IV, 1897, pages 172-234, Herbert 
Osborn and E. D. Ball, ‘‘Contributions to the Hemipterous 
Fauna of Iowa.’’ Here, locality records for a few species of 
pentatomids are given. 
Proc. Ia. Acad. Sei., Vol. V, 1898, pages 232-247, Herbert Os- 
born, ‘‘ Additions to the List of Hemiptera of Iowa with Deserip- 
tions of New Species.’’ In this paper eight additional species are 
listed along with one genus, Geotomus sp. of the family Cydnidae. 
Proc. la. Acad. Sci., Vol. VI, 1899, pages 36-39, Herbert 
