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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 ocellar setae mouth cone microtrichia metasternum metanotum mesosternum mesonotum maxillary palps

MAXILLARY PALPS: Paired sensory appendages attached to the outer apical surface of the stipes (part of maxilla).
 character state
MESONOTUM: Main dorsal sclerite plate of the 2nd segment of thorax.
MESOSTERNUM: Main ventral sclerite plate of the 2nd segment of thorax.
METANOTUM: Main dorsal sclerite plate of the 3rd segment of thorax. craniale et caudale.
METASTERNUM: Main ventral sclerite plate of the 3rd segment of thorax.
MICROTRICHIA: Rigid projections from the cuticle surface without any nerve supply.
MOUTH CONE: The united parts of labrum, labium, galea and stipes, which contain the stylets (laciniae and mandible).
OCELLAR SETAE:
2 or 3 pairs of setae are commonly found on the head in the region of the ocelli; pair 1 if present is in front of the fore ocellus; pair 2 arise laterally near the inner margin of the compound eyes; pair 3 varies in position but is often near the anterolateral margins of the ocellar triangle.
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.