Madagascar hissing cockroaches – Gromphadorhina portentosa After Alex Bryant’s middle school science curriculum, 81 percent of students report being more comfortable handling and interacting with insects, such as the Madagascar hissing cockroaches (Gromphadorhina portentosa) used in the program. Leave a Reply Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed. Search Search for... Search Subscribe to Entomology Today! Enter your email address to subscribe to Entomology Today. You'll receive notifications of new posts by email. Email Address Get Certified!