Cryptochetidae

Distinguished from other Schizophora by reduced or absent arista on antennae (family name refers to 'hidden bristles'). Differs from other Lonchaeoidea by having no more than one proclinate orbital bristle on each side. Single pair of abdominal spiracles is diagnostic. Metallic blue-black coloration and stout build with broad high head are characteristic. Previously confused with Agromyzidae but now recognized as distinct family.

Tiny flies, 2–4 mm in length. Body stoutly built, metallic blue-black in color. Head broad and high. Wings clear. Antennae with cleft in second segment; arista absent or minute and indistinguishable. Frons densely setulose. Costa with break at end of subcosta. Single pair of abdominal spiracles (unique among flies). Male with symmetrical sixth abdominal sternite and distinct 8th tergite. Female with seventh tergite and sternite fused, eighth segment elongated.

Associated with host scale insects on plants; adults found in vicinity of infested vegetation. Specific microhabitat requirements not well documented.

Primarily tropical distribution. Recorded from multiple regions including Jordan, Spain, Algeria, and various tropical countries. Precise range poorly documented for most species.

• scale insects (Coccidae) - larval endoparasitoidLarvae develop internally within host; specific host range varies by species
• mealybugs (Pseudococcidae) - larval endoparasitoidDocumented for some species including Cryptochetum jorgepastori
• Icerya - hostSpecific host of Cryptochetum iceryae
• Pseudaspidoproctus hyphaeniacus - hostHost of Cryptochetum jorgepastori on date palms in Jordan

Complete metamorphosis with four larval instars. First instar sac-like, lacks trophi and tracheae, has pair of finger-like caudal processes. Caudal processes elongate and become filamentous in subsequent instars, exceeding body length in final instar; likely function as respiratory organs. Caudal end of digestive tract closed in early instars. Pupation occurs within host remains.

Larvae are endoparasitoids, developing internally within living scale insects. Adult behavior poorly documented.

Biological control agent of scale insects. Cryptochetum iceryae has been used in classical biological control programs against Icerya purchasi (cottony cushion scale).

Used in biological control of agricultural pests, particularly scale insects damaging to crops and ornamental plants. Cryptochetum iceryae historically important in control of cottony cushion scale in citrus.

• AgromyzidaePreviously classified within Agromyzidae; distinguished by reduced arista, single pair of abdominal spiracles, and endoparasitoid lifestyle versus leaf-mining habit of Agromyzidae
• LonchaeidaeShares superfamily Lonchaeoidea and cleft second antennal segment; distinguished by reduced arista and endoparasitoid versus saprophagous or phytophagous habits of Lonchaeidae
• ChamaemyiidaeAlso parasitoids of Coccoidea; distinguished by antennal structure and abdominal spiracle number

Formerly considered a subfamily or group within Agromyzidae; now recognized as distinct family based on morphological and biological differences.

• parasitoid
• biological control
• scale insect parasite
• minute flies
• tropical

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• First record of the parasitoid Cryptochetum jorgepastori (Cadahia, 1984) (Cryptochetidae: Diptera) from Jordan