Species of Pyrgotomyia share the long antenna (pedicel and flagellomere 1 long), long oviscape, and eversible
membrane of the ovipositor with rudimentary (or without any) sclerotized structures, and I consider these characters to support monophyly of the genus.
The larvae elicit tending behavior from ants through chemical communication originating from a pair of eversible
tentacles and, perhaps, other specialized epidermal glands (Pierce et al.
sigillata by the strongly developed eversible
sac (weakly developed in C.
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Some eggs have an eversible
sac-like structure at the pointed apex, which is highly variable in shape and length among species (Stuckenberg 1963).