1978] 
Kugler — Pogonomyrmex mayri 
179 
Aedeagus fairly slender, with serrate ventral margin; serrations 
decrease in size to apex. Apex narrow, blunt; half smooth, half 
finely serrate. Inner dorsal margins of gonocoxites form a long 
narrow, gently convex V. 
Sculpture like that of worker and female, with the following 
exceptions: Striation on head largely transversely arcuate caudad of 
antennae, clypeus without coarse undulations. Trunk and petiole 
without overlying broken wavy sculpture; all but pronotum longi- 
tudinally striate. Striation on postpetiole gives way to purely 
punctate sculpture in caudal half. Gaster, first and second anten- 
nomeres, and legs smooth and shining, except for weakly striate fore 
coxae. 
Discussion 
Pogonomyrmex mayri clearly belongs to the genus Pogono- 
myrmex as presently constituted; and is most closely related to 
members of the subgenus Ephebomyrmex. It is most like Ephebo- 
myrmex in 15 of the 22 characteristics used by Cole (1968) to 
distinguish males and workers of the subgenera Ephebomyrmex and 
Pogonomyrmex, the sting apparatus most resembles that of the 
Ephebomyrmex species I have examined (Kugler, 1978), and some 
of its most unusual characters, such as the elongate head of the 
male, the Y-shaped frontal triangle of the queen and worker, and 
the circumocular groove, may be seen as the extreme development 
of characteristics of Ephebomyrmex species. Nevertheless, it is 
remarkably different from any known Pogonomyrmex, with a 
number of novel characters, and consequently has been placed in its 
own subgenus ( Forelomyrmex Wheeler) since its description. The 
following shows how other Pogonomyrmex species compare with 
mayri 9 s most distinctive features. 2 
The clypeus in most Pogonomyrmex has a concave leading edge 
except in angustus, darlingtoni, odoratus, schmitti and townsendi 
(all Ephebomyrmex ), none of which has a median tooth. The frontal 
triangle is usually broadly triangulate, but is somewhat elongate, 
laterally compressed, and except for a median carina, depressed 
2 Except where indicated, based on the MCZ collection containing 51 of the 
estimated 67 presently standing species, subspecies and varieties of the subgenera 
Ephebomyrmex and Pogonomyrmex. 
