prothorax

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Related to Pronotum: pronotal, Propleuron

prothorax

[prō′thȯr‚aks]
(invertebrate zoology)
The first thoracic segment of an insect; bears the first pair of legs.
References in periodicals archive ?
Body black clothed with very dense yellowish pubescence with the exception of 2 areas near antennal scapes, 2 triangular areas on vertex, beginning from apical half of the 3rd up to the end following antennal segments, 2 longitudinal bands on medio-lateral parts of pronotum and interspaces of elytral bands clothed with dark brown ground pubescence.
Sides of pronotum faintly longitudinally reticulate along wide upper and anterior margins, smooth below and behind.
awpron, anterior width of pronotum; Hw, head width; iod, intra-ocular distance; LFIII, length of hind femur; LFW, forewing length; Lpron, pronotum length; Ltars1-III, length of basitarsomere III; LTIII, length of hind tibia; OL, ovipositor length; pwpron, posterior width of pronotum; wFIII, width of hind femur; wFW, median forewing width; wpron, pronotum width.
Sides of pronotum distinctly reticulate-coriaceous (not longitudinally so), in upper 0.
30; similar to male in general structure and coloration, with following exceptions: head dark brown, with lateral margins of vertex bordering inner margins of eyes narrowly dark yellow; pronotum dark blackish brown, with posterior margins of calli broadly dark yellow; hemelytra with clavus dark brown, central corium broadly dark red, anterior angles of corium translucent yellow, basal half of cuneus red, posterior half of cuneus creamy white: wing membrane fumate brown, veins dark brown surrounding inner cell, bright red surrounding outer cell (Fig.
The characters distinguishing the new species are the following: head and mesosoma partly black or brown; antennal segments 4-5 not broader than other segments; posterior ocelli not touching occipital carina; pronotum partly black, humped, with distinct posterior collar; scutum punctate, unsculptured among punctures; metapleuron without shiny and unsculptured area; dorsal surface of propodeum more than twice as long as posterior surface; segment 1 of protarsus slightly longer than segment 4.
3 mm and sharp posterolateral corners of the pronotum (Fig.
Pronotum, mesonotum, and metanotum rectangular; each bearing 1+1 tubercles near posterior margins laterally (Fig.
Propleuron and anterior margin of pronotum brownish yellow to reddish brown.
glabrofasciatum); rather short and obtuse lateral process of pronotum (acute in M.