Morphology of Lathyrus spp. and B. affinis from Québec, Canada A apex of L. latifolius stem, garden plant (45.464, −75.561) B L. sylvestris stem, pressed (45.457, −75.767) C egg of B. affinis on outer pod wall of L. sylvestris D opened pod of L. sylvestris with seed entry holes of B. affinis larvae and white inner pod wall tissue developing beneath oviposition sites E infested seed of L. sylvestris with first instar larva of B. affinis F same with second instar larvae. Scale bars: 50 mm (A, B); 0.5 mm (C); 25 mm (D); 5 mm (E, F).