No. 422.] MEW AGRICULTURAL ANT FROM TEXAS. 89 
punctate. The head, thorax, and petiole are somewhat more 
coarsely rugose than in zmberbiculus, and the epinotal spines 
more acuminate at their tips. The most striking difference, 
however, is in the sculpture of the postpetiole, which in xegelii 
is but little finer than that of the petiole, whereas in the Texan 
species this segment is nearly smooth. 
Recently Forel (99, pp. 61, 62) has discovered in Columbia 
still another beardless and otherwise aberrant Pogonomyrmex 
(P. mayri), which he assigns to a new subgenus, Janetia. This 
is based very largely on the predaceous, non-granivorous habits 
of the species and on the neuration of the male fore wings, 
which exhibit only a single cubital cell. He expresses doubt 
as to whether 7. 
negelit should be in- 
cluded in his new sub- 
genus, but leaves the 
matter undecided, as 
he supposes the male 
of this species to be Fic. 3.— Pogonomyrmex negelii Forel. Worker. 
unknown. This, how- ; 
ever, appears to be an oversight, since Mayr (87, p.612) describes 
both the male and female of P. nægelii. He clearly states that 
the female has two cubital cells and that the wings of the male 
are the same as those of the female. Now from the very close 
affinity of P. zmberbiculus with P. negelit it is safe to predict 
that the latter is also a grain-eating species. Weare compelled, 
therefore, to regard the small group of Pogonomyrmex — 
ing the beardless Texan and Brazilian species as transitional 
between Pogonomyrmex sensu stricto and the subgenus J — 
rather than as belonging to the latter. It may be advisable 
ultimately to erect a special subgenus for the two small grain- 
storing species, but a careful study of the males and females 
of all the known species of the genus should be previously 


undertaken. HE : 
The workers from two nests of P. zmberbiculus, with their 
numerous pupæ, nearly mature larvae, and their store of vp 
were put together in the same artificial nest. : The ants from 
different nests fraternized without the slightest signs of hostility, 
