A LIST OF THE COLEOPTEEA OF IOWA 3 



drift from the Labrador center. Each of these areas shows some 

 difference in topography and consequently in fauna. 



In forests, the state is poor, the principal timber follows the 

 course of the streams and is rapidly being cut off. Practically 

 the whole consists of deciduous trees, though some conifers are 

 found in the northeastern portion. This lack of coniferous for- 

 ests explains the absence of many species of insects common in 

 adjacent states. ]\Iany of our records of pinicolous beetles are 

 due to their importation from other districts in sawed lumber. 



On the whole, our beetle fauna is quite homogeneous, and is 

 that of the central prairies. Some western types of plants and 

 insects invade our counties along that side, in some instances 

 extending nearly across the state — Eleodes and Xothopus be- 

 ing good examples. The marshes of the Wisconsin drift support 

 some northern types, while the lower reaches of the ]Mi.ssissippi 

 River yield forms which are more characteristic of the Ohio 

 Valley. 



This catalogue is based mainly on the collections of the 

 writer. To the data thus afforded have been added the published 

 records of Osborn and Putnam, numerous references to Keokuk 

 and Cedar Rapids from the works of Casey and Brendel, to- 

 gether Avith a few from the papers of other recent systematists. 

 Much information has been obtained from collections made at 

 Iowa City by R. ^I. Anderson. C. H. Edmondson. John G. Grif- 

 fith, M. P. Somes. Dayton Stoner, D. E. :\Ierrill. :\Iary M. Mc- 

 Guire, Alice Yocom, and Mrs. H. F. Wickham. From other 

 parts of the state, material has been secured through friends 

 whose names appear with the list of abbreviations. Frank 

 Shoemaker of Omaha has sent notes on the occurrence of insects 

 at Council Bluffs, and Frank R. ]\Iasou of Philadelphia has 

 kindly furnished data from the H. G. Griflith collection, made 

 mostly at Burlington. Dr. A. Fenyes of Pasadena has given 

 valuable assistance in making up the list of Aleocharinas. 



LOCALITIES AND .ABBREVIATIONS. 



A. Ames. All records from the Osborn list. 



B. Independence. Collections by the writer and ^Mrs. H. F.. 



Wickham. 



