25 



May-beetles belonging to twenty-seven species, the first four of which, 

 in order of numbers, were represented by 91.1 percent of the whole 

 and the first six by 98.2 percent. In southern Illinois our 20,121 

 specimens belonged to twenty-eight species, the first nine of which 

 were represented by 87.2 percent of the specimens and the first four- 

 teen by 97.2 percent. 



It is evident from the foregoing that only a comparatively small 

 number of these species of our rather long list have, in any section or 

 location, any special significance either as economic or ecological fac- 

 tors in the general system of life, and to these more abundant species 

 principal attention must be given. 



May-beetles of the three Sections of the State 

 in the Order of their Abundance* 



Northern Illinois 



Central Illinois 



(15,457 specimens) 



(78,916 specimens) 



Fusca, 



4356 



Hirticula, 



40,484 



Futilis, 



3197 



Implicita, 



14,222 



Eugosa, 



2326 



Inversa, 



9,762 



Anxia, 



1959 



Fusca, 



7,442 



Inversa, 



1259 



Futilis, 



4,547 



Implicita 



718 



Tristis, 



1,037 



Ilicis, 



560 



Eugosa, 



410 



Tristis, 



523 



Ilicis, 



234 



Drakii, 



279 



Fervida, 



174 



Hirticula 



81 



Drakii, 



142 



Nitida, 



76 



Crassissima, 97 



Crenulata 



, 54 



Anxia, 



82 



Micans, 



19 



Crenulata, 



73 



Congrua, 



14 



Horni, 



66 



Forsteri, 



9 



Fraterna, 



58 



Villifrons 



, 8 



Yehemens, 



21 



Prunina, 



8 



Prunina, 



19 



Fraterna, 



6 



Forbesi, 



13 



Balia, 



3 



Micans, 



10 



Corrosa, 



1 



Bipartita, 



6 



Fervida, 



1 



Balia, 



5 







Calceata, 



2 







Barda, 



2 







Congrua, 



1 







Forsteri, 



1 







Villifrons, 



1 







Profunda, 



1 







Undetermined, 3 



Southern Illinois 

 (20,120 specimens) 

 Forbesi, 

 Hirticula, 

 Micans, 

 Implicita, 

 Bipartita, 

 Fraterna, 

 Vehemens, 

 Profunda, 

 Fervida, 

 Futilis, 

 Crenulata, 

 Corrosa, 

 Tristis, 

 Congrua, 

 Delata, 

 Ilicis, 

 Anxia, 

 Crassissima, 

 Forsteri, 

 Praetermissa, 

 Eugosa, 

 Longitarsa, 

 Arkansana, 

 Calceata, 

 Drakii, 

 Prunina, 

 Barda, 

 Hirtiventris, 

 Fusca, 

 Undetermined 



3,367t 



2,874 



2,671 



2,040 



1,719 



1,448 



1,405 



1,335 



682 



556 



503 



475 



324 



175 



106 



79 



75 



68 



60 



55 



33 



15 



11 



*The nomenclature of this list, and of course of the entire paper, is that of 

 Dr. Eobert D. Glasgow, as given in Article V, Vol. XI, of the Bulletin of the 

 Illinois State Laboratory of Natural History. (For synonymy see column of 

 remarks in table on p. 47.) 



tSpecial collection of 352 specimens obtained in 1911 not included. 



