n.1.The act of darkening, or state of being dark; darkness; obscurity.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Head, thorax, and body brown with irregular grey infuscation. Eyes brown.
Wing: Cu[A.sub.2] virtually at right angle to and in line with bm-cu; wing membrane dark, with broad discal fascia extending from R4+5 to Cu, and an apical infuscation; tegula and basicosta dark brown, similar to adjacent wing base, which has 3 long costagial setae, inner one very long and inclinate.
1C): hyaline; light brown fumose on the apical area; forewing with blackened basal cell; costal vein relatively short and ochre; veins ochre, becoming brownish in the apical area; the extremities of the veins with dark brown markings on both sides, and with deep brown infuscation on the radial and radiomedial crossveins; ambient vein dark brown; apical area octoloculate.
Fore wings infuscate about in basal third, the infuscation becoming faint distally and hyaline in distal half and the costal cell; hind wings hyaline.
Adult botflies have morphological characteristics (hair patterns, density, and color, plus wing infuscation, and arista coloration) that allow for easier identification than larvae.
cypria Nartshuk middle of all femora and tibiae, fore coxa yellow to pale brown with indistinct infuscation on inner side; gena uniformly yellow, as wide as diameter of fore tibia (Cyprus) 6.--Legs brownish yellow with all S.
Superficially, the glossy, uniformly brownish-orange color, with the slight infuscation of the fastigium and wings help distinguish this genus.
apicalis also has a rounded apical wing spot); pale 'iridescent' subapical band between apical wing spot and central infuscation; central infuscation vague, but rather large with some slightly darker sections around crossvein R-M and around anterior half of crossvein M-Cu; glabrous basal sections of wing include basal third and posterior edge of cell c, basal section of cell [r.sub.1] well proximal of junction of veins [R.sub.2+3] and [R.sub.4+5] (but no anterior edge), basal 2/3 of cell br, basal section of cell bm and basal half of cell cup, remainder of wing covered with microtrichia; tip of vein Cu narrowing towards wing margin.
18 Wing with distinct infuscation over point of insertion of [R.sub.2 + 3] in costa, together with apices of [R.sub.4 + 5] and M.