NOTES ON MEXICAN ANTS. 61 
SUBFAMILY PONERIDZ. 
Ponera. This genus, which is allied to the “Driver Ant” 
of the west coast of Africa, is known by having the node of 
the peduncle thickened, nodiform, with the first segment of 
the abdomen more or less constricted. In the anterior wings 
there are one marginal, two complete submerged, and one 
discoidal cell. All the tibial spurs of the tibie are pectinate, 
or comb-like. 
Ponera strigata. “Temperate region of Mexico, under 
stones.” 
Ponera pedunculata Smith. One worker was received 
from Mexico. This species has previously occurred at Pan- 
ama and at Rio. 
Ectatomma. This genus is known by the thickened node 
of the peduncle, and the deep constriction between the first 
and second segments of the abdomen. The antenne are in- 
serted low down at the base of the clypeus; the eyes are 
placed above the middle of the face, while the spurs of only 
the anterior tibiæ are pectinate. 
Ectatomma ferruginea. (Fig. 4, 4a, side view of pedun- 
cle of the abdomen.) “Mexico. This species is only found 
in the encinales, or oak forests of the hot and temperate 
region, where it lives in little societies under the trunks of 
fallen trees.” The male differs very greatly in its antenne 
and the form of the thorax from the worker. Mr. Smith has 
noted and figured several such cases. But this species seems 
peculiar in the division of the metathorax. 
SUBFAMILY MYRMICIDÆ. 
In the genus Eciton, the peduncle consists of two nodes. 
The males and females are unknown. Both kinds of work- 
ers have very minute eyes, which are absent in some species. 
In several species the major workers have very long man- 
dibles curved at the end, but without teeth. 
Eciton hamata Fabr. “Rio Atoyai, near Cordova.” This 
is also found in Brazil and Cayenne. The two kinds of 
