Agonopterix alstroemeriana alkaloids obtained from its host plant. They also have the advantage of local predators being less familiar with the species because they are non-native. The caterpillar may also benefit from the toxic alkaloids present in the poison hemlock host plant because they may increase the ability of "A. alstroemeriana" to recognize "Conium maculatum" as the correct location for oviposition. They pupate for 2 weeks in the soil, usually from late May to early June. The color of pupa is red-brown, with fine hairs densely located. The length of pupae is approximately 6–7 mm. After pupating, the moths emerge from the
I Should Have Known Better It was not released as a single at that time. In 1976, it was released as a B-side to "Yesterday". In the US, "I Should Have Known Better" was released on 13 July 1964 as the B-side to "A Hard Day's Night" and reached number 53 in the "Billboard" Hot 100, and number 43 on the "Cash Box" chart. As part of the film contract, United Artists acquired album rights for the American market. The company released a soundtrack album on 26 June 1964 with eight Beatles songs and four instrumentals. "I Should Have Known Better" was performed in the