Couplet 46

46a:  Pretarsal claw with long, acute process or blade arising from base, usually more than half as long as claw, rarely (Hornia) reduced to hyaline spine; antenna filiform; body corpulent and soft

Meloidae   p. 438

46b:  Pretarsal claw simple; antenna weakly clubbed; body cylindrical (Euaesthetinae)