Abstract

ABSTRACTLarval instars of the myrmicine ant Strumigenys solifontis Brown were determined by measuring the head width under a stereomicroscope and examining the morphology, especially chaetotaxy, by light microscopy and scanning electron microscopy. This study found that the larval stage consisted of four instars, but the first and second instars were not distinguishable by their head widths. However, the four instars could be discriminated clearly by a combination of size measurement and observations on the chaetotaxy. Within a population, there are few larvae in the first instar because of its short period (only 1–2 days before moulting into the second instar) and the low oviposition rate of the queen. Therefore, the first-instar larva needs to be collected separately from other instars so that it is not missed.

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