39 



in any other of our collection years, but was, nevertheless, even then 

 only fifth among our southern Illinois species in frequency of occur- 

 rence. There is nothing peculiar in the seasonal dates of this species. 

 Our earliest southern Illinois captures were made between March 28 

 and April 17, and our latest from the middle to the last of June. 

 With respect to its food it is like many other southern species — an oak- 

 hickory-persimmon May-beetle, 88 percent of our specimens having 

 been taken from these trees. Some 10 percent from willows and 2 

 percent from ash account for the small remainder. 



Phyllopliaga vehemens Horn 



Vehemens, represented by 1426 specimens, is a typical southern 

 species in Illinois, only 21 coming from central and none from north- 

 ern Illinois. The central Illinois specimens were collected in Macon 

 and McLean counties in 1907, 1908, and 1909 ; in southern Illinois 

 we have taken the species at many points from Belleville to Shawnee- 

 town and Cairo. All but 36 of our specimens were collected at lights, 

 and we have no sufficient data for a discussion of the food of the 

 species. About nine tenths of our vehemens collection was obtained 

 at Carbondale in 1910, mainly between March 27 and April 15, addi- 

 tional scattering specimens occurring up to May 24. This seems to be 

 the earliest in spring of all our May-beetles, altho occasional captures 

 of it have been made by us up to July 1. Veliemens was among the 

 dominant species in southern Illinois in 1910, where it was exceeded 

 only by Mrticula and micans, but its numbers in the three other years 

 of our southern Illinois collections have been but few. Its food, as 

 already remarked, is practically unknown. 



The foregoing sixteen species are represented by 112,118 speci- 

 mens, thus amounting to nearly 98 percent of our Illinois collections. 

 The remaining eighteen species are represented by only 2356 specimens 

 in all — too few to give their numbers any important ecological or 

 economic significance. It seems, nevertheless, incumbent upon me to 

 report such facts as the record contains, as hints or clues which may 

 be of use to other entomologists. These remaining species will be 

 treated, like those preceding, in the order of their numbers in our 

 collections. 



Phyllopliaga crenulata Froelich 



Crenulata was represented by 630 specimens, 503 of which were 

 from southern, 73 from central, and 54 from northern Illinois. It is 

 thus distinctly a southern species, as is most dearly seen from the 

 ratios of its numbers in each section of the state to the total for the 

 state as a whole. These are, respectively, 79.8 percent for southern, 

 11.6 percent for central, and 8.6 percent for northern Illinois. It 



