Colias johanseni is one of the rarest butterflies in that genus. A paper describing its life history is now available on-line at The International Lepidoptera Survey (TILS) web site. Home page: http://tils-ttr.org To access paper directly: http://tils-ttr.org/report06.html Click on Number 3 Immature Stages of Colias johanseni from Arctic Canada (Lepidoptera: Pieridae) To subscribe to TILS TTR (The Taxonomic Report) go to: http://tils-ttr.org/subscribe.html Please forward this announcment to any other groups to which this might be of interest. Thanks Ron Gatrelle