Metasternum


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Met`a`ster´num


n.1.(Anat.) The most posterior element of the sternum; the ensiform process; xiphisternum.
2.(Zool.) The ventral plate of the third or last segment of the thorax of insects.
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Meso-and metasternum unarmed; medioventral carina of four posterior femora and tibiae unarmed 2 --Meso-and metasternum spinose; medioventral carina of four posterior femora and tibiae dentate (Figs 25, 26) Jeremia 2.
Ventral coloration: Orange hazel; rostral segment I reddish brown with apex yellow, II to IV reddish brown; pro-, meso-, and metasternum black; metathoracic peritreme dark yellow; evaporative area black; fore and middle legs with coxae, trochanter, and femora orange hazel, and tibiae orange hazel with 1 or 2 diffuse yellow rings; hind leg with coxa, trochanter, and femur dark brownish orange, and femoral spines brownish black; hind tibia dark orange with 3 diffuse yellow rings; tarsi of each leg with basal half of each tarsus dark yellow and apical half brownish black.
reticulatum, are nearly identical in appearance (and both are somewhat variable), being differentiated primarily on the basis of the color of the metasternum and second antennal segment (Dillon & Dillon 1961; Green 1952).
Mesosternal lobes elevated, apically pointed, metasternal lobes rounded, weakly flanged; mesosternal lobes not overlapping metasternum.
Metasternum sides almost fully pubescent, including latera fossae; metasternal disc delimited entirely by punctate area.
palmyra for the present, because they possess the distinctively concave posterior metasternum, a small and bidentate posteromedial metasternal process, and a basally incised fore tibia, but have not designated them as paratypes because of the significant geographic distance separating the two populations, which suggests that the Pagan population may eventually prove to be a distinct species once additional material is available for a more detailed evaluation.
Head capsule usually wider than long, oval, depressed, frons ridged between and above antennae; mouth parts inferior; prosternum variable; pronotum usually wider than long occasionally as wide as long, convex, prosternal process short, truncate; mesepisternum and mesepimeron cut off from mesocoxal cavity by meso- and metasternum, mesepimeron reduced in size; scutellum cordate; tarsi, simple; claws, simple, dentate or undentate.
Mesonotum with 1 moderately long brownish notopleural, 1 postalar and 4 subequally long scutellar setae (apical pair cruciate); some minute setulae present behind postpronotal lobe; mesosternum and metasternum between posterior four coxae bare.