ACOUSTICALLY-ORIENTING PARASITOIDS IN CALLING AND SILENT MALES OF THEFIELD CRICKET TELEOGRYLLUS-OCEANICUS

1. On three Hawaiian Islands, the introduced Australasian field cricke t Teleogryllus oceanicus Le Guillou (Orthoptera: Gryllidae) was found to be attacked by the phonotactic parasitoid tachinid fly, Ormia ochra cea Bigot. 2. Noncalling males occurred with callers in all locations, but silent males were more heavily parasitized than callers. 3. Body size was unrelated to both calling status and the likelihood of harbou ring parasitoid larvae. 4. An experiment examining the likelihood of c alling in the laboratory by males collected as silent or calling indiv iduals showed no difference between the two classes of males, after ac counting for parasitoid levels; males harbouring larvae were less like ly to call.