Phratora

Larva: body length 4.60–5.80 mm, width 1.50–1.90 mm, head width 0.85–0.90 mm (third instar). Body yellowish-white with head brown, tubercles and legs light brown in alcohol; head dark brown with anterior region and mouthparts largely yellowish-white. Body elongate, rather broad, widest at meso- and metathorax, thence moderately narrowed posteriorly. Stemmata six on each side, four located above antenna and two behind antenna. Antenna: segment I short, II stout, more or less as wide as long, with a conical sensorium and five small setae apically; III subconical with six small setae apically. Labrum slightly emarginate with two pairs of setae and two pairs of campaniform sensilla medially and one pair of setae at anterior border. Epipharynx with four pairs of stout and four pairs of small setae at anterior margin and one pair of small setae medially. Mandible palmate, 4-toothed, with two setae and two campaniform sensilla. Mala rounded with eight pointed setae, two blunt setae and one campaniform sensillum. Prementum with two pairs of short setae and one pair of small setae at base of labial palp. Hypopharyngeal area with three pairs of short setae and two pairs of campaniform sensilla. Tubercles: DLi with a small egg burster situated anterior to a short seta; small tubercles Dai and Dp present on abdominal segments I–VI. Defensive glands on abdominal segments I–VII well developed in second and third instar larvae, almost invisible in first instar. A pair of longitudinal bands of very dense and strongly sclerotized platelets appear only in third instar.

Literature