Scotch argus Adults fly from June to August. The eggs are laid singly on the leaves of grass. The larvae hatch after two weeks. The hibernating larva is reported to feed on "Agrostis", "Dactylis", "Poa annua", "Bromus erectus" and other grasses. In Scotland the main host plants are purple moor-grass ("Molinia caerulea") and blue moor-grass ("Sesleria caerulea"). Scotch argus The Scotch argus ("Erebia aethiops") is a butterfly of the family Nymphalidae. In spite of its English name "argus", it is not a close relation of the brown argus nor the northern brown argus. Subspecies include: "Erebia aethiops" is widespread in the Palaearctic
Ferranti Argus parallel ALU and the 400 was serial. The Argus 400 had an add time (two 24 bit numbers of 12 μs. The Argus 500 (with 1 μs store) took 3 μs. Divide (the longest instruction) took 156 μs on the Argus 400 and the Argus 500 took 9 μs. The Argus 500 was of course much more expensive. A CORAL high-level programming language compiler for the Argus 500 was developed by the Royal Signals and Radar Establishment under contract to Ferranti for use in industrial control and automation projects. Typical Argus 500 installations were chemical plants (process control) and nuclear