a b c d e f g h empty empty k l m n o p empty r s t empty empty empty empty empty empty
Particular attention is given to key characters, because it is essential that they be interpreted correctly. You can use additional photographs within the key when you are unsure of the character state discussed in the text. A double click on the character state thumbnail opens the related character state photograph and the mouse cursor will surround the important specific character state.
Overview fore leg prosternum sternites metasternum abdomen metasternum head tergites I-II tergites tergite VIII wings fore wing distal head antennae head tergites pronotum tergite VIII meso- and metanotum fore wing fore leg sternites area of interest
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(antecosta-campaniform sensilla) -> (cilia-craspedum) -> (cross vein-furca) ->(gena-maxillary stylets) ->
(maxillary palps-ocellar setae) -> (ocellar triangle-posteroangular) -> (posteromarginal-setae) ->
(spine-wing retaining setae)

Overview craspedum coxa costal cilia costa costa compound eyes comb clypeofrons clavus cilia

CILIA: Fringes or slender hair-like processes around the margins of the wings (Terebrantia: with 8-shaped socket cells, Tubulifera: without socket cells, fringes arise between the membrane layers of the wings.
character state
CLAVUS: Lobed area at the posterior base of the forewing.
CLYPEOFRONS: An unpaired ventrocranial head sclerite. The Clypeus consists of two parts: membraneous anteclypeus and the clypeus, which is fused with the frons, which is delimited by clypeus, inner margin of the compound eyes and cranial region of the vertex.
COMB: A row of closely spaced and slender microtrichia on the posterior margin of tergite VIII.
COMPOUND EYES: The compound eyes consist of an aggregation of a variable number of ommatidia.
COSTA: A thickened anterior longitudinal margin of the forewing.
COSTAL VEIN: Most anterior longitudinal vein of the forewing.
COSTAL CILIA: Cilia along the anterior margin of the forewing.
COXA: Basal segment of an insect leg.
CRASPEDUM: Thin sclerotized lobes on the posterior margin of abdominal tergites.
Gordh, G & Headrick, D (2001): A dictionary of Entomology. CABI Publishing, Oxon & New York, 1032 pp.
Gullan, PJ & Cranston, PS (1994): The Insects: An Outline of Entomology . Chapman and Hall, London. 491 pp.