1966] 
Gotwald and Brown — Shnopelta 
275 
Color deep piceous, nearly black; mandibles and other appendages 
lighter, more reddish (castaneous) . 
Holotype and a single paratype worker on a separate pin received 
from Dr. E. S. Ross of the California Academy of Sciences, bearing 
the following label data: “PERU: 28 mi. E. Olmos, Lambayeque. 
2000 m. 1-19-1955. E. I. Schlinger & E. S. Ross collectors.” It 
seems possible that these two workers were part of a larger series, 
the bulk of which may still be stored in alcohol at the Academy of 
Sciences. My query about this collection reached Dr. Ross while 
he was in the midst of preparations for a long trip, when he had no 
time to search through the extensive collections of ants in alcohol. He 
did, however, furnish the additional information about the type lo- 
cality in a letter: “The locality 28 mi. E. of Olmos is a curious cloud 
forest zone on the west slope of a low Andean pass. The east slope 
is desert!” 
Paratype worker: TL 5.5, HL 1.08, HW 0.98, WL 2.00, great- 
est diameter of eye 0.06, scape L 0.93 mm. Cl 91. Very similar to 
holotype in all details checked. 
Holotype in California Academy of Sciences, paratype in Museum 
of Comparative Zoology, Harvard University. 
Key to Shnopelta workers 
1. Head > 0.80 mm wide; occipital margin distinctly concave in 
the middle as seen in dorsal full-face view (Fig. 16) ; brownish 
black (E. Peru) laticeps 
Head < 0.80 mm. wide; occipital margin approximately straight 
(feebly convex to extremely feebly concave in dorsal full-face 
view) (Fig. 10) 2. 
2. Pronotum smooth and strongly shining, as are a large part of 
the anterior dorsum of the head and various other parts of 
the alitrunk; black (Ecuador) manni 
Head and alitrunk, including pronotum, sculptured and more 
or less opaque 3. 
3. Mandibles with a large apical tooth, followed basad by 6 or more 
irregular smaller teeth in series; bright ferruginous red, ap- 
pendages, petiole and gaster yellow (Brazil: Espirito Santo) 
bicolor 
Mandibles with two large teeth at apex, followed basad by a large 
diastema, (containing at most 1 to 3 spaced denticles) or one 
moderate-sized tooth, and finallv a large basal tooth 4. 
