122 
Psyche 
[September 
scence on the scape, especially (according to Creighton) 
on the inner surface near the tip. The most extreme 
series we have examined, from Pullman, Wash. (W. M. 
Mann), has no more than four or five hairs raised at 
all strikingly from the surface along any single edge of 
the scape, and none of these makes an angle of more 
than 45°. Other western series show every gradation 
from this extreme to the typical, completely “smooth” 
subintegra condition. An intermediate pilosity has been 
encountered also in a series from Rogers City, Presque 
Isle Co., Mich. (P. B. Kannowski), but otherwise the 
puberula variant is mostly limited to the western United 
States. 
Sublucida was erected by Wheeler for a single series, 
which he considered to have a distinctively smooth and 
shining body surface. Examination has shown that this 
series is really well within the normal range of variation 
of subintegra, and in fact is not far from average for 
that species. Wheeler’s inability to recognize his own 
variety was revealed when he later inadvertently added 
a large part of the unlabelled sublucida type series to 
the subintegra section of his collection. 
Perhaps the most extensive variation shown by sub- 
integra is in quantity and length of body pilosity. At one 
extreme, exemplified by the type series, numerous hairs 
are present on the pronotum and mesonotum, at the junc- 
tion of the basal and declivitous faces of the propodeum, 
and along the dorsal crest of the petiole. The pronotal 
hairs are especially abundant, fairly long and sinuous, 
and form a characteristic pattern, the anterior ones bend- 
ing posteriorly and the posterior ones bending anteriorly, 
so that those at the very center often seem in side view 
to touch or cross at the tips. At the other extreme, rec- 
ognized by Wheeler in his variety gilvescens, only a few 
scattered stubby hairs are present on the pronotum, and 
the mesonotum, propodeum, and petiolar crest are com- 
pletely bare. The “typical” subintegra tends to have longer 
hairs throughout, e. g. the longest on the first gastric 
tergite (exclusive of the extreme posterior strip) may be 
0.20 mm or more, while in the “gilvescens” extreme of 
