22 
Psyche 
[March 
TABLE I — SO]' 
Character 
Pheidole cr eight oni 
Pheidole pilijera 
Pheidolt 
Cephalic 
sculpture 
Heavy transverse occipital 
rugae ; vertex smooth ; frons 
longitudinally striated to 
finely rugulose ; brightly 
shining 
Coarse longitudinal stria- 
tions or rugae cross whole 
length of head; become re- 
ticulate on occiput; opaque 
Longitudir 
on vertex, 
punctures; 
shining; o 
ticulate 
Body 
sculpture 
Almost completely shining; 
thoracic sculpture only on 
mesopleurae and epinotal 
pleurae ; gaster shining, 
smooth 
Interrugal sculpture granu- 
late; thorax, petiole, post- 
petiole opaque ; gaster gran- 
ulate, weakly shining 
Opaque ; 
typical pil 
Measurements 
Length, 3.80 mm. 
Head index, 0.92 
Length. 4.47 mm. 
Head index, 0.95 
Length, 3. 
Head indi 
(average 10 individuals) 
(average 10 individuals) 
( 1 individ 
Humeral 
angles 
Well-developed in most 
individuals 
Prominent; marked by fine 
rugae 
Well-devel 
fine rugae 
Postpetiole 
Conules prominent and 
sharp 
Conules present but blunt 
Conules li 
fera 
Clypeal notch 
Well-marked ; concave 
Shallow and V-shaped 
Very shall 
Color 
Head bright yellowish red ; 
thorax brownish red ; gaster 
dark brown 
All reddish brown; frons 
and vertex slightly redder 
Dark reddi 
tabl: 
Body 
sculpture 
Entire body brightly shin- 
ing; only mesopleurae and 
epinotal pleurae slightly 
granular 
Head granulate and fine- 
ly longitudinally striate, 
opaque; thorax, petiole and 
postpetiole granulate; gaster 
shagreened but shining 
Sculpture 
that of pil 
promesono 
pleurae an 
mg 
Postpetiole 
Postpetiole broad, twice as 
wide as petiole 
Postpetiole broad, about 
2 V* times as wide as petiole 
Postpetiole 
* Specimens not seen. The species is known only from types in the American Museum 
Natural History, the Museum of Comparative Zoology, and the collection of W. 
Creighton. Data were obtained from the literature and from Dr. Creighton. 
