The differences in the right and left wings in the bees of the same hive is marked. The right wing has the larger number of hooks, but the left wing is the broader. In hive number one the average number of hooks in the right wing is 21.3, left 20.9; but the anterior wing on the right side is 4.21 mm., while the left anterior wing is 4.28; that is, there is a compensation for the reduced number of hooks in the increased width of the wing. This is true of the first three hives. In the fourth hive there is a slight advantage in favor of the right wing.
The following general conclusions may be drawn from these measurements:
(a) There is a variation in the number of hooks in a given hive ranging between 17 and 23.
(b) The difference in the number of hooks in the right and left wing is compensated for in a given hive by the increased size of the wing. The right and left wings are in physiological equilibrium.
(c) In different hives the increase in the number of hooks is accompanied by an increase in width of wing; that is, the variation is emphasized so that selection would work much more effectively; while in the individual, where—if selection operated on account of this variation—it would have to be between different wings of the same bee, the variation is eliminated.
TWELVE PLANTS ADDITIONAL TO THE OHIO LIST.
W. A. Kellerman.
The species named below have not heretofore been recorded as a part of the Ohio flora. The first collector and locality are given for each of the listed species. The serial number prefixed to each name indicates where in the Fourth State Catalogue the species should be inserted.
123a Sorghum vulgare Pers. Occasionally escaped.
270b Secale cereale L. Rye. Occasionally escaped.