non-biting       
adjective (also nonbiting) uk/ˌnɒnˈbaɪ.tɪŋ/ us/ˌnɑːnˈbaɪ.t̬ɪŋ/
 不咬人的
Non-biting insects do not injure people by making small holes in their skin.
  The non-biting insects outnumber the ones that bite by two to one. 不咬人的昆虫数量以二比一的比例超过咬人的昆虫。 
 This nonbiting variety of mosquito is found all along the coast.
 - More examples
 - Only the non-biting male insects were released by the scientists.
 - The adult flies are non-biting, as their mouths are poorly developed.
 - His research involves studying a type of non-biting aquatic fly.
 - The bats feed almost entirely on non-biting midges.