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[December 
have been taken. This is scarcely surprising in view of the 
rarity of the European atratulus. 
As has already been mentioned the presence of Anergates 
in North America presents some points of peculiar interest. 
In the Old World Anergates atratulus, a workerless parasite 
with degenerate, pupoidal males, is known to occur only in 
the nests of Tetramorium csespitum. There is no reason to 
suppose that the American species possesses a generically 
different host. However it has been generally held that the 
presence of Tetramorium csespitum in this country has come 
about through introduction from Europe. In point of fact 
there is more than a little evidence in favor of such a view. 
In 1905 when Dr. W. M. Wheeler published a list of the ants 
of New Jersey (1) he outlined the range of T. cxspitum as 
follows: “It occurs northward and eastward of New York 
as far as the Connecticut boundary, westward as far as Phil- 
adelphia and southward as far as Virginia.” In subsequent 
years Dr. Wheeler published two other faunal lists dealing 
with New England species. The first of these (2) which ap- 
peared in 1906 covered all the New England states. In this 
paper there is a single record of cxspitum based on material 
taken by Dimmock at Springfield, Mass. The second of the 
lists mentioned above (3) appeared in 1916 and dealt with 
Connecticut only. In this paper Dr. Wheeler stated that 
cxspitum must certainly occur in Connecticut but he added 
that at the time of publication he had no actual records of 
the insect from that state. In 1927 Dr. Wheeler, reported 
(4) the first appearance of cxspitum in metropolitan Boston, 
In the same year I found several colonies of this ant along 
the paths of the Arnold Arboretum in Forest Hills. I have 
subsequently received specimens from Dr. Geo. Tullock 
taken at Bridgewater, Mass. Since csespitum is by no means 
an obscure ant it follows that the virtual absence of New 
England records prior to 1929 can scarcely be credited to 
oversight on the part of collectors. For this reason its ap- 
pearance in the vicinity of Boston in 1928 may be regarded 
as a migrational ingress. This is entirely in keeping with 
