The ashgray blister beetle. EpiCtluta [abricii (LeConte); th e striped blister beetle. E. lilt/ala (F.) ; and the margined bli ster beetle, E. p estijer« Werner. collected in the field from plants of sweetclover low in coumarin content, fed preferentially in the Iaboratory on low-coumarin leaves when offered a choice between leaves from highand low-coumarin plants. The black bli ster beetle. E....
