The oviscape is the elongate, tubular or conical, basal part of the ovipositor. It is formed from the fused tergite and sternite of segment 7. It bears a pair of spiracles laterally, and a pair of flangelike lobes basolaterally. The spiracle ratio to mesonotum length is the distance from the base of the oviscape to the level of the spiracles measured ventrally along the midline divided by the length of the mesonotum. The mesonotum is the dorsal side of the thorax. It is measured in dorsal view along its midline, from the anterior margin of the scutum to the apex of the scutellum.

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