Key to the mature larvae of five related species of Chinese Altica Goeffroy

1. Subspiracular tubercle of abdomen with three setae (two conspicuous and one smaller) (Figs 25, 26)............ A. koreana

- Subspiracular tubercle of abdomen with two setae............................................................ 2

2. Pronotum with four pairs of setae anteriorly........................................................ A. cirsicola

- Pronotum with five pairs of setae anteriorly................................................................ 3

3. Lateral side of mandibular teeth serrated (Fig. 24)................................................ A. caerulescens

- Lateral side of mandibular teeth not serrated................................................................ 4

4. Mandible with four distinct teeth and a small fifth proximal tooth (Fig. 23)............................. A. viridicyanea

- Mandible without small fifth proximal tooth (Fig. 21)................................................ A. fragariae