Report of the Commissioner of Agriculture for the Year ...U.S. Government Printing Office, 1881 - Agriculture |
Other editions - View all
Common terms and phrases
abdomen acres Agriculture animal antennae anthrax appearance Aspidiotus August August 28 Average Bacillus bacteria Bacterium BERKSHIRE PIG blood body bushels cane carbolic acid cattle cent chickens cholera color containing corn crop cultivated dark brown Dark green diameter disease dorsal eggs examination experiments exudation exuviae female Fertilizer fore wing genus germs glands globules Glucose glumes granules grass inch inoculated insect joint July July 26 larvae length Light green liquid lung male membrane micrococci milk morbid changes mucous nearly non-albuminoid observed October orange parasite plants Plate pleuro-pneumonia posterior pounds pupa scale scale insects schizophyta schizophyte seed segment Sept September skin Solids not sugar sorghum species Specific gravity specimens spines spinnerets spores stalks starchy sucrose surface swine plague temperature third lobes tibiae tion tissue trees tube virulent virus wines yellow yellowish
Popular passages
Page 296 - States ; from the Atlantic to the Pacific, and from the Great Lakes to the Gulf of Mexico.
Page 313 - Scale of female. — The scale of the female is long, narrow at the anterior end, much widened posteriorly, and quite convex. The exuviae are brownish yellow; the secretion, of which the remainder of the scale is composed, is white; but all of my specimens appear dark gray, being more or less covered with the hairs of the stem to which the scale was attached and with dust. Length of scale, 2 mm. (.08 inch). Female. — The last segment of the female presents the following characters : The anterior...
Page 324 - Upon the imported oaks on the Department of Agriculture grounds at Washington. Only the females were found and the male description is taken from Signoret. The species is not a common one in Europe, but is occasionally quite destructive to an individual tree. Subfamily LECANINAE Genus CEROPLASTES The species belonging to this genus are furnished with a thick covering of waxy material, which does not, however, adhere closely to the insect. This covering is formed of layers secreted by the spinnerets....
Page 418 - The minute contagious bioplast," he says, "is less than the T^oVinrth of an inch in diameter and often so very clear and structureless as to be scarcely distinguishable from the fluid in •which it is suspended."** Quite recently it has been shown that certain kinds of cells allow granules of protoplasm to wander from them under certain physiological conditions, and that these granules are not to be * Referred to by Dr.
Page 341 - ... cottony matter of several shades of color and with a secretion of still longer filaments. Skin with rounded spinnerets and with long scattered hairs. Antennae of nearly the same size throughout their whole length and with a long pubescence. The digitules of the claw elongated and buttoned ; of the tarsus as simple hairs.
Page 319 - The median lobes are large and wide, with the sides parallel; they are only about three-fourths as long as broad; each lobe is narrowed on each side near the distal extremity by one or two notches and then rounded. The second lobe of each side is about as wide as the first, and is deeply incised; mesal lobule with mesal margin as long as lateral margin of the first lobe, and rounded posteriorly; lateral lobule about half the length and width of mesal lobule and similar in shape. Third lobe obsolete.
Page 340 - ... is another simple line of short hairs. Male. — The male is of a reddish yellow, darker upon the head and thorax, with brown legs and antennae, and light gray wings. The head is thick, rounded, acuminate between the antennae, with four smooth eyes and two ocelli. The antennae are 10 jointed, with the fourth, flfth, and tenth longest, all joints furnished with...
Page 288 - The plates are all deeply fringed; those between the first pair of lobes on their distal margins, the others on their lateral margins. They are all well developed, exceeding the lobes in length, and are situated as follows: Two between the first pair of lobes, two between the first and second lobes of each side, two between the second and third lobes, and three between the third lobe and the lobe of the margin of the body.
Page 305 - The females are yellow, circular in outline, a little elongated posteriorly. The last segment of the body presents the following characters: The anterior group of Spinnerets consists of about eight, the anterior laterals of from ten to sixteen, and the posterior laterals of about eight. There are four lobes, which are nearly in a straight line, the end of the body being truncate. These lobes are quite small, rounded posteriorly and are equidistant from each other. The second lobe of each side is...
Page 297 - XII, fig. 4) : There are five groups of spinnerets; the median consists of about six, the superior lateral of about twelve, and the inferior lateral of about eight. The oval pores opening on the dorsal side of the body are to be seen very distinctly from below. There are three pairs of well-developed lobes.