Tree Cholla Cacti (image) University of Chicago Press Journals Caption Multiple stages of cactus bugs on tree cholla cacti. Most insects in this photo are juveniles. There is one adult on the cactus fruit (top right) and one newly eclosed (pale) adult at the lower left. Credit Courtesy T. Miller. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.