See my web page http://www.nhm.org/research/entomology/phorids/dry.htm for a short note I wrote about HMDS many years ago. Brian ________________________________ Brian V. Brown Associate Curator of Entomology Natural History Museum of Los Angeles County 900 Exposition Boulevard Los Angeles CA USA 90007 telephone (213) 763-3363 fax (213) 746-2999 email bbrown at nhm.org http://www.nhm.org/research/entomology