. Ants; their structure, development and behavior. r insects that develop in darkcavities of the soil or in the tissues ofplants or animals. Ants rarely or neverbring- the brood to the surface unless theyfeel compelled to move to another nest orbelong to species like the slave-makers,which kidnap the young of other ants. Oc-casionally, however, during very warmweather, the young may be brought to thesurface after nightfall. In the dry deserts ofwestern Texas, I have seen bring its larvae and pupae out ontothe large crater of the nest about 9 P. carry them leisu
. Ants; their structure, development and behavior. r insects that develop in darkcavities of the soil or in the tissues ofplants or animals. Ants rarely or neverbring- the brood to the surface unless theyfeel compelled to move to another nest orbelong to species like the slave-makers,which kidnap the young of other ants. Oc-casionally, however, during very warmweather, the young may be brought to thesurface after nightfall. In the dry deserts ofwestern Texas, I have seen bring its larvae and pupae out ontothe large crater of the nest about 9 P. carry them leisurely to and fro, much ashuman nurses wheel their charges about thecity parks in the cool of the evening. Since the brood is always nurtured in darkness we must supposethat the manipulation which this implies depends on -highly developedtactile and olfactory senses to the exclusion of vision. Evidence of theexquisite perfection of these senses of contact-odor is seen in the segre-gation of the brood according to age and condition. The eggs, larvae. FIG. 35. Embryo of For-mica gnara. (Original.) in,Mandible: .r, maxilla; /, la-bium ; pl, fore leg : />4, eva-nescent appendage of firstabdominal segment; s1, meso-thoracic stigma; n, nerveganglion of future ventralcord ; y. yolk ; g, lateral edgeof germ-band which advancesdorsally to enclose yolk. and pupae of different sizes are placed in separate piles in the same ordifferent chambers of the nest, reminding one, as Lubbock ( 1894. P- 7*aptly says, of a school divided into five or six classes (Fig. 34).Inspection of the nests of many species of ants shows that this habitis very prevalent, although it is not so clearly manifested in primitive ro ANTS. groups ( Ioncrinae) or in species that form small colonies, as in theopulent formicaries of the more highly specialized genera (Myrmica,Aphcenogaster, l:»nnica, Camponotus, etc.). This classification seemsto he an e\])ression of a need for different degrees of moisture andtemperatur
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
