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Genus Hydrellia

small fly - Hydrellia Masked Duckweed Flies (Hydrellia personata) - Hydrellia personata Ephydrid? - Hydrellia small water-walking fly - Hydrellia Small water-walking fly #2 - Hydrellia Fly - Hydrellia Ephydridae - Hydrellia small fly - Hydrellia
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Ephydroidea
Family Ephydridae (Shore Flies)
Subfamily Hydrelliinae
Genus Hydrellia
Numbers
Nearctica lists 69 species.
Identification
"The adults of Hydrellia can be distinguished from those of other Ephydridae by the following characters: ocular pubescence moderately dense; face usually slightly convex (distinctly receding and planate in one group) ; postocellar as long or longer than ocellar; two or three dorsocentrals present, at least one of which is as long or longer than longest facial; median spermatheca cupuliform, heavily sclerotized. Some additional characters present in adults of most species are as follows: about three palpal and five labellar setae; one very fine, ventrally directed, secondary facial setula inserted above primary facial row; two fronto-orbitals (anteriorly and posteriorly inclined) ; apicodorsal antennals not projecting noticeably; three scutellars (basal, intermediate, and apical); one mesanepisternal, mesokatepisternal, and basal coxal; ground color of cuticle usually dark brown or black." (Deonier, 1971)
Remarks
Larvae are miners in aquatic plants. Some species are pests of cultivated rice.
Print References
Deonier, D. L. 1971. A Systematic and Ecological Study of Nearctic Hydrellia (Diptera: Ephydridae). Smithsonian Contributions to Zoology 68