. Ants; their structure, development and behavior. FIG. 8. Thorax of female, ergatoid and worker Ponerine ants in profile. (Emery.)A, Myrmecia pyriformis, dealated female ; B, M. spadicca, ergatoid female : C, , worker ; msn, mesonotum ; the remaining letters the same as in Figs. 6 and 7. owing to the disappearance of the scutellum, paraptera and metanotumas separate sclerites and to the fusion of the various elements in thepleural region of each segment. The legs of the ant show much less variation in structure than the a. FIG. g. Median sagittal sections to show difference of dev
. Ants; their structure, development and behavior. FIG. 8. Thorax of female, ergatoid and worker Ponerine ants in profile. (Emery.)A, Myrmecia pyriformis, dealated female ; B, M. spadicca, ergatoid female : C, , worker ; msn, mesonotum ; the remaining letters the same as in Figs. 6 and 7. owing to the disappearance of the scutellum, paraptera and metanotumas separate sclerites and to the fusion of the various elements in thepleural region of each segment. The legs of the ant show much less variation in structure than the a. FIG. g. Median sagittal sections to show difference of development of thoracicsegments in the worker and female Myrmica rubra. (Janet.) A, Worker; B, female;.-/, posterior portion of head; b, prothorax ; c, mesothorax ; </, metathorax ; e, epino-tum (first abdominal segment) ; f, petiole (second abdominal segment). ANTS. •// /I] \1 \—a i—-C thorax and arc, therefore, of less taxonomic value. Each of theseappendages consists of the same fixed number of joints, the coxa, tro-chanter. femur, tibia, and five tarsal joints. The first tarsal joint, often called the metatarsus, is much elongated, especiallyon the middle- and hind-legs, where it functions asa kind of secondary tibia, while the terminal tarsaljoint bears a pair of usually simple, but sometimestoothed, or pectinated claws. All of the tibia? maybe provided at their distal ends with spurs. Theseare always large and pectinated on the fore-legs,but may be simple on the middle and hind finely and regularly pectina
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
