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Schreiteria bruchi
Classification
Diagnostic Features of Larvae
- Mature larva. Form cylindrical, very robust, tapering posteriorly. Head slightly depressed with sides parallel, slightly constricted medially, and broadly rounded posteriorly. Frons with front margin very broadly and strongly sclerotized and ferruginous, the upper boundary feebly but distinctly produced or enlarged into a pair of paramedian lobes or protuberances; antennal foramen open posteriorly; six epistomal setae present. Mandible feebly tapering, about twice as long as basal width, with cutting edge feebly emarginate. One pair of ocelli present; lens oval, feebly convex, with pigmented spot indistinct owing to sclerotization of gena. Hypostoma short, strongly sclerotized, ferruginous and unevenly swollen; sutures pitchy, incurved. Gular region undefined, glabrous. Antenna 2-segmented, segment 2 bearing a large tapering hyaline process. Clypeus and labrum very strongly transverse, the latter coarsely setose anteriorly. Maxillary palp 3-segmented; segment 3 acutely conical, as long as segment 2. Labial palpi with segment 2 shorter than segment 1. Mentum distinct from submentum. Prothorax sparsely setose, with posterior area of pronotum dull, finely micro-spiculate; eusternum sparsely setose. Abdomen with dorsal ampullae tuberculate, glabrous, with at least those on tergites 6 and 7 bilobed and strongly protuberant. Segment 9 without a sclerotized process. Anus trilobate, sparsely setose. Epipleurum feebly protuberant on all segments. Pleural tubercle with a pair of sclerotized pits. Legs vestigial. Spiracles with peritreme very thick, ferruginous, subcircular; marginal chambers absent. Length up to 23 mm; maximum breadth (at prothorax) 5.5 mm. Adapted from Duffy (1960).
Biology and Economic Importance
- Biology unknown for members of this tribe. Species of this tribe are potentially invasive outside their native range.
Selected References to Larvae Specimens
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