Immature Stages of Diapriidae
Detailed information on immature stages of Diapriidae is being acquired. However, Clausen (1940) noted that the 1st instar larva (Fig. 117) is robust in form and of the mandibulate type. The head is very large, a bit flattened, and heavily sclerotized. It bears a pair of very large curved mandibles. There are 12 body segments; the last segment bears a pair of terminal lobes that have a number of setae. Otherwise there are no integument spines or setae.
The 2nd instar larva (Fig. 117) lacks the large, heavily sclerotized head of the preceding instar and is of normal form. Neither this nor the 1st instar possesses a tracheal system. The supposed 3rd and final instar larva is elongated, with 12 body segments, and possesses a complete tracheal system with 3 pairs of large spiracles on the thoracic segments. The contents of the host puparium are entirely consumed. The meconium is case by the prepupa, and after the final molt the pupa lies with its head at the anterior end of the puparium.
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