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In his research of natural cements, Vicat (1837) later on the same page informed that: "Very recently, natural cements have been found in Russia, and in France; we may compose them at once by properly calcining mixtures made in the average proportions of 66 parts of ochreous clay to 100 parts of chalk." In the June 1838 edition of JFI, Courtois (1838) defined hydraulic cement: "The terms of the series composed of 7, 8, and 9 parts of clay, respectively mixed with 3, 2 and 1 parts of lime, give, by calcination, substances that do not slake: their colour is more or less reddish, according to the greater or less quantity of oxide of iron in the clay."
Male (Plate I, figs 1, 2): Ground colour dark greyish brown; antennae quadripectinate, with 35 segments, 9 mm long, only last 4-5 segments bipectinate, longest rami 0.9 mm, ochreous. Head, thorax, and legs covered with long dark brown hair; colour of vestiture between metathorax and first abdominal segment orange, rest of abdomen on dorsal side dark brown with intersegmental tufts of orange hair, ventral half completely dark brown.
Could anything be more dead, more mute and inexpressive to the inexpert eye than the ochreous fragments of bone and the fractured lumps of flint that constitute the first traces of something human in the world?
Meindert Hobbema vivifies the richly ochreous decay of his Watermill (c.1665) with wind-tossed light, worthy of his master Ruisdael, which tousles the copious foliage, russet and golden, of the oak-trees on the knoll above the millstream.
At first a whirl of camera-generated images prevail--blurs, a pure blue frame as if of the sky, the disc of a solar corona--before a thick layering of ochreous paint shimmering on a black base takes precedence.
These have been prospected by Ennex International (Boland et al., 1992) and found to consist of troughs overlying epigenetic sulfide zones and filled with black sulfide-bearing (pyrite, galena, sphalerite) muds, residual barite, ochreous "calamine" (mostly hemimorphite) muds and gossan.
Forewing fuscous grey; costal area ochreous, suffused with fulvous; a costal spot beyond middle, with an obscure obliquely curved fuscous band from the spot to inner margin; inner margin narrowly ochreous, termen obtuse.
Kim JJ, Kim SJ (2003) Environmental, mineralogical, and genetic characterization of ochreous and white precipitates from acid mine drainages in Taebaeg, Korea.
Forewing membrane transparent, almost colourless in basal half and very weakly ochreous in apical half; veins yellow in basal half and greyish brown in apical half, apices of veins conspicuously darker, almost black (Fig.