In several cases, however, insects found living on different plants, have been observed by Mr. Walsh to present in their larval or mature state, or in both states, slight, though constant differences in colour, size, or in the nature of their secretions.
Kasu batzuetan, hala ere, Walshek hauteman du landare ezberdinen gainean bizitzen aurkitu dituen intsektuek beren larbaroan edo helduaroan, edo bietan, diferentzia txikiak baina iraunkorrak dituztela kolorean, tamainuan edo beren jariakinen nolakotasunean.