Spectra of the six definite or probable λ Boo stars in our sample are compared with synthetic spectra generated from ATLAS9 models having the parameters listed in Table 4. Panels a) and b) show the Ca ii K-line regions of λ Boo and 12 Ser, panels c) and d) show the H-δ regions of τ Peg and 15 And, while panels e) and f) show the blue regions of 35 Aql and HR 4875.