94 
Psyche 
[June-September 
The appressed pubescence is somewhat coarser and more 
yellowish and on the head and thorax somewhat longer than 
in the typical form of the species. 
Worker minor . Length about 8 mm. 
Colored like the worker major but the red coloration is 
more extensive, involving also the scapes, gula, sides of 
pronotum, petiole and coxa. 
Two major and a single minor worker taken by Dr. N. 
Holmgren at Tuiche, Bolivia and belonging to the Stock- 
holm Museum. 
Var. otoquensis var. nov. 
Worker maxima. Length 13-14 mm. ; head 4.5 mm. long, 
4 mm. wide; hind tibia 5 mm. 
Head narrowed behind at the posterior corners, which 
are narrow and very prominent; posterior border deeply 
concave; sides extensively and gula deep red, smooth and 
shining, with very fine, superficial punctures. Pronotal 
spines acute. Upper border of petiole strongly compressed, 
in some specimens irregular in outline, in others deeply 
excised in the middle. Appressed pubescence very dull yel- 
low, shorter and less abundant on head, thorax and petiole 
than in the var. satrapa . Legs somewhat brownish. 
Workers major and media. Length 10-12 mm. 
Like the maxima in color and pubescence, except that the 
sides of the head are deep brown or black. 
Described from a series of workers taken by myself Nov. 
19, 1911 from a nest in the decayed portion of a large 
mango tree on Otoque Island, about 30 miles from the City 
of Panama. 
Subsp. rex Forel. 
Worker maxima. Length 13-14 mm.; head 4.5 mm. long 
and 4.5 mm. broad ; hind tibia 5.2 mm. 
Differing from the maxima worker of sericeiventris in 
its somewhat more robust stature, in having the head as 
broad as long, with more convex, or swollen cheeks, the 
