228 



trip of June, 1905, have very generously [)erniitted the free use 

 of their collections and notes in this connection. The fulness 

 of the records for Meredosia and the Moline Sand Hill are dne 

 in no small degree to the keen discrimination and enterprising 

 activity of my field assistant, Mr. Frank Shobe. The extensive 

 collections and excellent library of the State Laboratory of 

 Natural History, and the Bolter Collection of Insects at the 

 TTniversity of Illinois have been especially useful to me. The 

 entire series of specimens collected has been turned over to 

 the State Laboratory. 



For each species the sand region localities and dates are 

 given, so far as known, and usually, in parenthesis, the number 

 of specimens taken, if more than one. followed by biological 

 notes or other items of interest. The systematic notes ( unless 

 very brief), including descriptions of new species, appear under 

 a separate heading at the end of the list, and are referred to by 

 number. Finally, the distribution of the species in Illinois 

 outside the sand regions is given, data being derived from the 

 State Laboratory collections, the Bolter Collection, and pub- 

 lished lists, supplemented by my own observations. The source 

 is cited only in case of the Bolter Collection and published lists. 

 The exact known distribution of the rarer species is given in 

 full; the more common ones are followed simply by "111.", or, if 

 known to be of general occurrence throughout the state, by "All 

 111." The most important of the published lists referred to ai-e 

 those of Mr. Charles Robertson for Carlinville, of Dr. Breu- 

 del ('87) for Peoria, of the Chicago group of entomologists 

 (see Kwiat,'05), of McNeill ('91— Illinois O/f/z^v^/frr/ ). of Melan- 

 der {'(rd—Midinidte), of Wolcott (,'95-'0lJ— central Illinois Cole- 

 opteni), and of H. Carman ('92 — AmpltiJjid and RcptH'ut. The 

 distribution outside of Illinois of species of restricted range has 

 already been given under "Geographical Distribution". 



The main Illinois Valley sand region (see map) extends 

 from our southernmost locality, Meredosia, which is about 

 eighty-hve miles north and a little west of St. Louis, to near Pe- 

 oria, about an equal distance noi-theast of Meredosia. Our 

 northernmost locality is the Moline Sand Hill, in the Rock River 



