First description of the immature stages of Dasyhelea alula and a redescription of adults from China (Diptera, Ceratopogonidae)

Dasyhelea alula Yu. Larva (a–c), male pupa (d–e), female pupa (f–g). a head, dorsal view b epipharynx, dorsal view c hypopharynx, dorsal view d dorsal apotome (male) e segment IX (male) f dorsal apotome (female) g segment IX (female). Scale bars: 0.1 mm. Abbreviations: hypostoma (HY); hypopharynx (hpy); epipharynx (epy); genital lobe (GL); terminal process (TP).