The insects were most likely intended for exotic insect collections, according to customs officials, who say the illegal pet trade is flourishing.

The beetles, which measured four to five inches long, can "pose a significant threat to our vital agriculture resources."

U.S. Customs and Border Protection officials intercepted dozens of live beetles concealed in Japanese snack packages at the Los Angeles International Airport last month. Agriculture specialists assigned to the airport discovered 37 live beetles hidden inside packages of Japanese snacks,