IOWA PENTATOMOIDEA 303 



DISTRIBUTIONAL NOTES ON SOME IOWA 

 PENTATOMOIDEA. 



DAYTON STONER. 



During the past two summers the writer has been enabled, 

 through the co-operation of the Iowa Geological Survey, to visit 

 various parts of the state for purposes of collecting both mam- 

 mals and insects. In the course of this collecting, some species 

 of Pentatomoidea not before recorded from Iowa have been 

 secured and, in addition, distributional records of a number of 

 species have been added. Considerable collecting has been done 

 in the vicinity of Iowa City also and this has resulted in some 

 new additions to and increased the known distribution of the 

 state fauna in this group. 



As more intensive and extensive collecting is done it is in- 

 teresting to note the considerable number of Pentatomids found 

 in the state which are usually thought of as being of more 

 southerly or westerly distribution. However, sufficient collect- 

 ing has not yet been done to warrant any extended conclusions 

 being drawn at this time. Since little work has been done by 

 the writer in western Iowa, some six or seven species recorded 

 by Professor Osborn more than a decade ago and mostly from 

 that region remain to be found in the present study. 



The species which follow do not represent the entire num- 

 ber found within the state but only those are included which 

 would seem to be of especial interest at this stage of the work. 

 With the conclusion of this paper sixty species of Pentatomoidea 

 will have been recorded from Iowa through the efforts of Pro- 

 fessor Herbert Osborn and the writer. 



Family THYREOCORIDAE. 

 Subfamily Thykeocorixae. 



Thyrcocoris lateralis Fair. Least common of the members of 

 the subfamily. 



Specimens at hand from Ames, Iowa City, McGregor, Ana- 

 mosa and Solon. 



