134 
Wesmaeli, Crossocerus, 
30 
Westwoodii, Stenamraa, 5 
Wilkella, Andrena, 71 
„ Melitta, 71 
Willughbiella, Apis, 78 
„ Megachile, 
78 
INDEX. 
X. 
xanthomelana. Apis; 80 
„ Osmia, 80 
xanthopus, Halictus, 60 
„ Melitta, 60 
xanthosticta, Apis, 86 
„ Nomada, 86 
xanthura, Andrena, 73 
Xanthura, Melitta, 73 
Xylaecus, 33 
xylurgus, Crabro, 27 
Z. 
zonulus, Halictus, 59 
zonalis, Melitta, 62 
ERRATA. 
Page 128 — flavoguttata, Apis, add 86. 
„ „ Nomada, add 86. 
Edward Newman, Printer, 9, Devonshire Street, Bishopsgate. 
