is due L. L. Buchanan, Wilbur Brigg^s, Miss Eva Hastings, my 

 wife, and others who were present at the Lakeside Laboratory 

 during the summer. To Professor B. Shimek the writer is in- 

 debted for the determination of the plants hereinafter mentioned. 



In the arrangement and classification of species the system 

 adopted by E. P. Van Duzee in his Check List of the Hemiptera 

 has been followed.^ 



A brief review of the general physiographic features of some 

 typical collecting grounds may not be out of place here. How- 

 ever, for a more comprehensive account of the physiographic 

 features of the Okoboji region as a whole, the reader is referred 

 to Professor Shimek 's paper on "The Plant Geography of the 

 Lake Okoboji Region." ^ 



The vicinity of the Macbride Lakeside Laboratory offers ex- 

 cellent collecting grounds all within easy access. Indeed, so 

 many ecological areas are seldom found within so circumscribed 

 a region. Deep woods, swamps, sandy beaches, high rolling 

 prairies with their respective types of flora — all are within one 's 

 ability to investigate and they afford excellent opportunities for 

 the entomologist. The Laboratory itself is situated at the head 

 of Miller's Bay on West Okoboji lake which Professor Shimek 

 has designated ' ' the finest body of water in Iowa. " Immediately 

 to the south of the Laboratory grounds the topography is rough 

 and all along the margin of the lake are rather abrupt banks on 

 which typical forest vegetation is found. These well-wooded 

 ridges are separated at intervals by swamps and sloughs. In the 

 wooded areas Cosmopepla himacvlata, ApateUcm cynicus and 

 Euschistm tristigmus were found in some numbers. The region 

 to the north of the Laboratory is high, rolling prairie. 



Lookout, a considerable elevation a quarter of a mile west of 

 the Laboratory, is about 155 feet above the level of the lake. 

 Here, xerophytic conditions prevail and pentatomids more 

 typical of the prairie were found, the Scutellerid Homcemus 

 Mjugis being most abundant. 



ELm Crest, about a mile southeast of the Laboratory, presents 

 a shore line of high, wooded banks. From here there is a gradual 

 slope away from the margin of the lake to the southeast f urnish- 



^Van Duzee, E. P. Check List of the Hemiptera of America North of Mexico, 

 N. Y. Ent. Soc, 1916. 



2 Bulletin from the Laboratories of Natural History, State University of Iowa, 

 Vol. VII, pp. 4-13, 1915. 



40 



