. Ants; their structure, development and behavior. FIG. 125. Parasyscia niigusta1 of Texas, a, Worker : b, apterous female. (Original.) inaclnts clanis and Ii<cinatodcs). Cook has observed the habits of theGuatemalan kelep (Ectatomma tnbcrcnlatnni ), recently introduced intoTexas for the purpose of exterminating the cotton-boll weevil, andthere are some notes on other forms scattered through the classification on pages 134-137 shows that the Ponerinse com-prise a number of different tribes, and this number will undoubt-edly be augmented, when the subfamily has been carefully
. Ants; their structure, development and behavior. FIG. 125. Parasyscia niigusta1 of Texas, a, Worker : b, apterous female. (Original.) inaclnts clanis and Ii<cinatodcs). Cook has observed the habits of theGuatemalan kelep (Ectatomma tnbcrcnlatnni ), recently introduced intoTexas for the purpose of exterminating the cotton-boll weevil, andthere are some notes on other forms scattered through the classification on pages 134-137 shows that the Ponerinse com-prise a number of different tribes, and this number will undoubt-edly be augmented, when the subfamily has been carefully studied,beyond that of any of the other subfamilies. So much differentia- THE PONERINE ANTS. 227. tion would seem to contradict the statement that the Ponerinse repre-sent the ancestral stirp of the Formicidse, but when we stop to con-sider that we are dealing1 with a very ancient group, the survivingrelicts of a great cosmopolitan and probably Mesozoic fauna, this differ-entiation is what we should expect. The more recent and specializedsubfamilies, with the exception of the Myrmicinae, though very rich inspecies, have not yet been able to develop an equal variety of genericand tribal types, whereas the Poneringe have hadtime and opportunities to advance and retro-grade along many different lines and to attain ahigh degree of specialization in certain may roughly divide the genera of this sub-family into three groups: those which are emi-nently primitive and generalized (Myrmecia},those which exhibit a mingling of primitive anddegenerate traits (Cerapachys, Acanthostichus,Stigmatomma, Amblyopone, Proceratium, Sys-phincta, etc.), and those in which primitive aremore or l
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
