53 



may be readily bred and grown in great abundance and by the simplest 

 methods, on raw egg. 



Relative Attractiveness of Different Kinds 

 of Trees and Shrubs to May-beetles 



The following is a list of the plants from which onr Illinois May- 

 beetles were collected from 1907 to 1913, with the number of collec- 

 tions from each kind of plant, the number of specimens which these 

 collections contained, and the average number of specimens per col- 

 lection. 



Plants from which May-beetles were collected 



Food-plants 



Apple 



Ash 



Birch 



Box-elder 



Blackberry 



Catalpa 



Cherry 



Coffee 



Corn 



Currant 



Currant, flowering 



Dogwood 



Elm 



Gooseberry 



Grape 



Hackberry 



Hawthorn 



Hazel 



Hickory 



Honey-locust 



Honeysuckle 



Hornbeam 



Horse-chestnut . . . 



Lilac 



Linden 



Locust 



7,802 



852 



818 



147 



6,515 



2 



1,958 



1 



402 



19 



16 



44 



3,861 



864 



19 



207 



399 



389 



7,484 



460 



21 



68 



73 



44 



30 



55 



2 



26 



1 



4 



4 



4 



3 



207 



40 



2 



21 



25 



17 



178 



48 



1 



4 



1 



6 



51 



5 



114 

 12 

 19 



5 

 118 



1 

 75 



1 

 101 



5 



4 

 15 

 18 

 22 



9 

 10 

 16 

 23 

 42 



4 



8 



1 

 17 



2 

 19 



4 



Food-plants 



Maple 



Mountain ash. . 



Negundo 



Oak 



Osage orange. . 



Peach 



Persian olive. . 

 Persimmon. . . . 



Plum 



Poison ivy 



Poplar 



Redbud 



Rose 



Snowball 



Sycamore 



Syringa 



Tree of heaven, 



Viburnum 



Walnut 



Willow 



Food-plants. . . 

 Miscellaneous. 



Lights 



Plow-furrow. . 

 Data deficient . 



Total 



a 



g 

 "3 



CD 



& 



CO 



a 

 .2 



9 



'o 

 o 



o 



O 



o 



o 



. 308 



11 



760 



12 



16 



12 



18,162 



230 



1 



1 



434 



3 



15 



7 



1,849 



24 



171 



17 



22 



4 



7,562 



104 



14 



2 



476 



13 



9 



3 



77 



2 



6 



5 



14 



7 



47 



7 



1,691 

 8,733 



50 

 216 



73,656 

 3,362 



35,498 

 1,937 



40 





114,593 



19 

 63 



1 



79 



1 



145 



2 



77 



10 

 5 



73 

 7 



37 

 3 



38 

 1 

 2 

 7 



34 



40 



In cases where a sufficient number of collections were made to 

 give us a fair idea of the attractiveness of the plant to May-beetles 

 at night, we have the means of a significant comparison of these trees 

 and shrubs as a lure to these insects and a consequent source of danger 

 to the crops of neighboring fields. 



