Trialeurodes ricini

Adult body yellow, wings hyaline, covered with sparse, powdery wax. Fourth-instar larva: vasiform orifice suboval to rectangular, closed behind, length 33 μm (26–36 μm), inset from posterior margin by less than its own length, just over half occupied by the operculum with only part of lingula head visible; lingula head lobed, spinulose with pair of stout setae. Margin relatively smooth or very finely crenulate in parts, not differentiated at thoracic and abdominal tracheal openings. Chaetotaxy comprises paired ASS, length 24 μm (20–28 μm); cephalic tubercles well developed, oval to subrectangular. Antennae long and slender, length 85 μm (64–92 μm). Abdominal setae bases correspond approximately with anterior margin of vasiform orifice. Mid and hind coxae and tibio-tarsi with long spine-like setae.

Literature