74 
Bulletin Wisconsin Natural History Society. [Vol. 5, No. 2. 
only ; the intemigal surfaces over the whole region finely and rather 
feebly punctate. Thorax with coarse, regular, longitudinal rugae except 
on the sides of the pronotum where the surface, at least behind, is 
uniformly and densely punctate. Petiole and sides of postpetiole 
longitudinally rugose, node of latter smoother and densely punctate, 
finely striated or sometimes slightly glabrous. Hairs moderately 
abundant, slender and pointed. Body and appendages red ; gaster with 
a broad dark brown or blackish band across the middle. 
Female. Length 5 — 6 mm. Antennae and sculpture of head like 
those of worker ; thorax more sharply longitudinally striated above. 
Head, thorax, pedicel and appendages red ; gaster black or dark brown ; 
an anteromedian and two parapsidal blotches on the mesonotum, the 
metanotum, and posterior border of the scutellum, black. Nodes of 
petiole and postpetiole and in some specimens also the upper surface 
of the head dark brown. Wings dilute yellowish at the base, with 
pale brown veins and stigma. 
Male. Length 4.5 — 4.8 mm. Scapes straight, rather stout, about 
1/3 as long as the funiculus, and as long as its five basal joints together ; 
club 4-jointed. Hairs white, very slender, rather long and abundant, 
erect or suberect on both the body and appendages. Body black ; tarsi, 
mandibles, genitalia and articulations of the legs yellowish ; antennae 
reddish brown. Wings white, very faintly yellowish at the base, with 
pale yellow veins and stigma. 
Colorado: Colorado Springs, 5,990 feet (Wheeler) ; Boulder, 
5,347 feet (T. D. A. Cockerell). 
2. Var. brevispinosa var. nov. 
Worker. Resembling the preceding in stature and color, but with 
very short spines which are not longer than half the basal surface of 
the epinotum and with more irregular, vermiculate thoracic rugae. 
Female. Somewhat paler than the typical form. The antero- 
median blotch of the mesonotum is lacking and the gaster is red, with 
a broad brown band across its middle. The epinotal spines are hardly 
longer than broad at their bases. Wings colored like those of the 
typical form. 
Male. Scapes somewhat curved and constricted at the base, about 
14 as long as the funiculus and as long as its four basal joints together. 
Colorado: Cheyenne Canon, 8,500 feet, and Colorado City, 
6,064 feet (Wheeler); Canon City, 5,329 feet (P. J. Schmitt). 
