

NOTES ON MEXICAN ANTS. 65 
Meat occupy ing a large portion of the head. Anterior 
sea OS with-one-marginél and three submarginal cells. 
ie ee bicolor Guérin. (Fig. 8. The hind legs 
nted, the specimen being imperfect.) “Mexico. 
also found in Columbia and at Panama.” 
- Pseudomy yrma flavidula Smith. Mexico. This is also a 
South American species. I cannot feel quite sure that it is 
P. flavidula. “Among the quite numerous species of Pseu- 
domyrma that one finds in Mexico, one class appears to be 
solitary (at least, one never meets them except alone) while 
the others (as is the case in P. bicolor and P. flavidula) 
live in greater or less numbers 
within the spines which arm the | 
stems of certain species of Mimosa. 
These spines, fixed in pairs upon 
the branches, are pierced near their 
extremity by a hole (seen in the cut 
at a), which serves for the entrance 
and exit of the ants. The interior 
is hollow and includes some neuters, 
the larvæ, and, in the season, males 
and females. The Pseudomyrma saat stings very 
sharply, and attaches itself with tenacity by its mandiiles to 
the part of the body which it seizes. Although this differs 
a little in size, one of these species may be considered to 
be the P. flavidula Smith.” 
Mr. Smith has described a species from Panama (P. mo- 
desta), “which lives in the hollow thorns or spines of a spe- 
cies of Acacia. The fe are three inches long, tapering 


