Tychius meliloti Stephens, 1831
sweet clover weevil
the larva feeds within the pod on the developing seed; this may cause some galling of the pods. Pupation in the soil.
Meliotus albus, altissimus, officinalis
Buhr and Dauphin & Aniotsbehere additionally mention, with explicit reservation, Medicago sativa. Dieckmann does not known this host plant.
Larvae and pupae are very extensively described by Skuhrovec, Gosik & Caldara. That the larvae would live in a leaf gall, as is sometimes written, is not correct. The larvae may be found mixed with the ones of T. breviusculus; see there for the differences.
Anderson & Howden (1994a), Buhr (1964a), Colonnelli, Osella & Cornacchia (2011a), Dauphin & Aniotsbehere (1997a), Dieckmann (1988a), Friedman (2018a), Houard (1909a), Lorenz (1997a), Mifsud & Colonnelli (2010a), Redfern & Shirley (2011a), Rheinheimer & Hassler (2010a), Skuhrovec, Gosik & Caldara (2014a), Tomasi (2014a).