216 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



These lay their eggs in the second growth, and some of the adults 

 from these appear the same season and the rest not until the fol- 

 lowing year. There seem to be at least three generations a year in 

 central Illinois, but the life history is complicated by the irregu- 

 larity in the time of development, though the greatest numbers of 

 adults appear about June 10th and August 10th, just as the clover- 

 seed is green. 



Control, No definite experiments have been made in the con- 

 trol of this pest, but from the knowledge of the life history as 

 given above there seems no doubt but that the same measures as 

 are employed against the clover-seed midge will secure immunity 

 from serious injury. 



The Clover-seed Caterpillar * 



" In its ability to diminish the seed crop, this pest ranks with 

 the seed-midge and the seed-chalcid. Attacking a clover head 

 that is green or partly in bloom, the little caterpillar eats out a 







FIG. 155. Clover-seed caterpillar (Enarmonia inter stinctana): a, caterpillar, 

 b, pupa; c, moth, all much enlarged: d, moth natural size. (After 

 Osborn.) 



cavity in the head, destroying many of the unopened buds and 

 some of the tender green seeds, and spoiling the head as a whole. 

 When no young clover heads are at hand, the caterpillar feeds on 



* Enarmonia interstinctana Clem. Family Grapholithidce. 



