Structure of male of Andrena amieti sp. n., A. montana, A. allosa and A. bicolor. 39, male of A. amieti sp. n. in lateral view. 40, labrum of A. amieti sp. n. 41, labrum of A. montana. 42, male of A. amieti sp. n. in frontal view. 43, male of A. allosa in frontal view. 44, section of mouthparts of A. amieti sp. n. 45, section of mouthparts of A. allosa. 46, dorsal view of mesosoma of spring generation of A. amieti sp. n. 47, dorsal view of mesosoma of summer generation of A. amieti sp. n. 48, section of right forewing of A. amieti sp. n. 49, section of right forewing of A. allosa. 50, T1–T4 of A. amieti sp. n. 51, T1–T4 of A. bicolor.