Fig. 4 in Life history and description of the larva of Acrotaeniostola spiralis (Diptera: Tephritidae: Dacinae: Gastrozonini), an Oriental fruit fly inhabiting bamboo twigs

Fig. 4. Pseudocephalon and first thoracic segment of the larva of A. spiralis (SEM photographs). A, Pseudocephalon and first thoracic segment, ventral view; B, Pseudocephalon, frontoventral view, showing two types of facial masks on the same individual; C, Pseudocephalon and part of the first thoracic segment, lateral view; D, Antennae and maxillary palpus; E, Area surrounding the mouth opening showing the preoral organ, facial mask and the mouth hook (tips broken off); F, Labial lobe. Abbreviations: ant = antenna, asp = anterior spiracle, dlg = dorsolateral group of sensilla, fm = facial mask, ko = keilin´s organ, lal = labial lobe, la org = labial organ (arrow pointing to left opening), max org = maxillary organ, mh = mouth hook, m or lb = median oral lobe, mp = maxillary palp, p ceph = pseudocephalon, pap-s = papilla-sensilla, pit-s = pit-sensilla, pror org = preoral organ, T1 = first thoracic segment.