130 ILLINOIS BIOLOGICAL MONOGRAPHS [524 



Sliowing Color Development and General Modification in Experiments on 

 Species Named. 



Explanation of Plate 



Figs. 559-562. Color development in Cicindela hirticollis. 



559. Condition 4 hours after emergence. 



560. Condition 15 hours after emergence. 



561. Condition 21 hours after emergence. 



562. Condition 21 days after emergence, full adult color. 

 Figs. 563-565. Color development in C. purpurea. 



563. Condition 20 hours after emergence. 



564. Condition 4 days after emergence. 



565. The same specimen as in figure 6, killed and dried on the fourth day 



after emergence. 

 Figs. 565-570. Experimental modification of color and color pattern by condi- 

 tions during the prepupal and pupa! stages. 



566. Dwarfed specimen of C. hirticollis produced by forcing the larvae 



without hibernation in their last vifinter (Experiment 70) ; mean 

 temperature, 37° C. ; moist. 



567. Normal individual of C. tranquebarica, collected in the field. 



568. Specimen with color modified by being kept in an ice box, during the 



pupal stage, like variety in eastern mountains (Experiment 6Sa) ; 

 mean temperature, 12° C. ; moist. 



569. Specimen with both pattern and color modified by hot dry conditions 



(Experiment 60); mean temperature, 37° C. ; dry. Like variety 

 in the western states. 



570. Specimen with both pattern and color modified by hot wet conditions, 



like variety in the moist southern states (Experiment 56) ; 37° C. ; 

 moist. 



