. Ants; their structure, development and behavior. demic. I know of no species common to the WestIndies and the southeastern center, and although many southwesternspecies occur in northern Mexico they seem to be for the most partquite distinct from the southern Mexican and South American the genus is cosmopolitan it is not improbable that our speciesmay be derived from relicts of Mesozoic forms that were preservedin the southeastern and southwestern centers during glacial further studies of the Mexican and West Indian, and espe-cially of the Cuban and Ilaytian species
. Ants; their structure, development and behavior. demic. I know of no species common to the WestIndies and the southeastern center, and although many southwesternspecies occur in northern Mexico they seem to be for the most partquite distinct from the southern Mexican and South American the genus is cosmopolitan it is not improbable that our speciesmay be derived from relicts of Mesozoic forms that were preservedin the southeastern and southwestern centers during glacial further studies of the Mexican and West Indian, and espe-cially of the Cuban and Ilaytian species may throw some light on theAmerican distribution of this interesting genus- A few words must be said about theants that have been importedinto North America by commerce, for although these comprise a com- THE GEOGRAPHICAL DISTRIBUTION OF ANTS. 53 paratively small number of species, they have considerable economicimportance. The following have been brought to our shores and havesucceeded in gaining a foothold, especially in dwellings where they do. FIG. 86. The Argentine ant (Iridomyrmex Iiuniilis). (Courtesy of Mr. W. Newell,drawing by Miss Charlotte M. King.) A, Worker; A, head; A, petiole of same inprofile ; B, dealated female ; B, head : B, petiole of same ; C, male ; C, head ; C,petiole. not come into competition with our native species: M onomorium pJia-raonis, salomonis, destructor and floricola, Solcnopsis ntfa, Phcidolcmegacephala and flaicns, Tctrainorium cespitum, guineense and ANTS. siinilliiintiii, rrcnolcpis fulra and lont^icornis,Tapinonia melanocephalum and Iridomyrmex hmnilis. All of these,with the exception of the pavement ant (T. cespitum), are of tropicalorigin, ajid nearly all of them have come from the Old World. of Kurope is now common about New York, Washingtonand Philadelphia, but it is so sporadic that we must conclude eitherthat it is of comparatively recent importation, or is prevented fromspreading bv competition with our native ants
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
