1930 ] An Unusual Nest of Pogonomyrmex 69 
With sacs from 0.5 to 1.0 long and indistinct veining — 
219. 
With transparent, clearly veined winglets from 0.8-1. 5 
—132. 
He further states that “the gradation of wing vestiges is, 
however, perfectly continuous, from small protuberances 
(without appendages) on the mesothoracic segment to the 
most developed winglets, with venation approaching that 
Fig. 2. a, wing of queen of Pogonomyrmex calif ornicus, Buckley; 
b, wing of pseudogyne shown in Fig. 1, B; c, wing of pseudogyne 
shown in Fig. 1, C; d, propodeum of pseudogyne. 
of the wing (6 mm. in length) of the mature queen.” Brues 
(1903) distinguishes three types of vestigial wings: 
1. Wings having essentially a pupal character, viz, devel- 
oping as normal wings up to the pupal stage, but failing 
to expand. 
2. Wings essentially normal except for their similar size 
and less complex venation. 
3. Wings consisting of little more than a hollow bag and 
giving no clue from their appearance as to the probable 
wing structure of their ancestors. 
The vestigial wing (Fig. b) from the first pseudogyne of 
the series would fall into the second category, while the 
