Insects Affecting Domestic Animals: An Account of the Species of Importance in North America, with Mention of Related Forms Occurring on Other Animals

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U.S. Department of Agriculture, Division of Entomology, 1896 - 302 páginas
 

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Página 201 - They slide as it were sideways extremely quick from one side of the fiber of a feather to the other, and move equally well in a forward or retrograde direction, which, together with their flat polished" bodies, renders them extremely difficult to catch or hold.
Página 66 - Angust 18 and 31, which would make it probable that it is single brooded. The localities are Carroll Lake, Cook and Ford counties at the north, and Fulton, McLean, and Champaign counties in central Illinois. The specimens were from a variety of situations, usually in low herbage, often taken visiting flowers. Larva: Length, 20 mm. ; diameter, 2.7 mm. ; prothorax with lateral shining areas about as long as the dorsal...
Página 67 - Prothoracic lateral space occupied by a pale brownish fuscous quadrate spot in front of the striated space. Meso- and meta-thoracic lateral stripes usually distinct, but slender, scarcely dilated posteriorly, lateral edges of dorsal areas diverging; lateral stripes above the abdomen almost wanting, except on last two segments.
Página 67 - ... segments. In these stripes the punctures of the upper and lower rows are indicated by rounded pale dots, and those of the inner rows by elongate dots. Last segment with bases of respiratory tube and anal prominence encircled with dark rings; joined by a lateral connection, its dorsum with at most a short basal line or pair of dots on each side. Coarser pubescence of false feet tipped with pale brownish.
Página 29 - ... to mosquitoes. In actual experience, two or three such cones, burned during the course of an evening, have given much relief from mosquitoes in sitting rooms. It does not kill the insects, however, and is at best but a palliative." " The mosquitoes found on the ceilings of bed-rooms in the evening may be quickly and easily killed by means of a small, shallow tin cup (such as the lid of a blacking box), nailed to the top of a stick and wet inside with kerosene. This cup is placed over the quiescent...
Página 132 - While the larvae are thus developing the flies are constantly laying fresh eggs in the wounds, so that the young worms take the places of the matured ones, and thus keep up a constant and progressive loss of tissue.
Página 61 - ... is readily visible, yet this integument is firm and the larva most vigorous and active, burrowing with great strength either backward or forward in the earth and between one's fingers when it is being held. Placed in water it will swim vigorously by suddenly curling round and lashing out its tail, but it is apparently not as much at home in this element as in the moist earth, for it is restless and remains near the surface with the tip of its tail elevated into the air. When the water is foul...
Página 91 - Three months' treatment was of no avail, and the end seemed near. One day a white object was seen to move in the ulcer at the root of the tongue, which, on being carefully extracted, proved to be a large grub, which, from having frequently seen them, I recognized as a full grown larva of Hypoderma. It was of the usual tawny color, about half an inch long when...
Página 117 - Careful stndy of the insects in the field shows that they assume two characteristic positions, one while feeding and the other while resting. It is the resting position in which they are always found when upon the horns. In this position the wings are held nearly flat down the back, overlapping at base and diverging only moderately at tip.
Página 44 - Schoenbauer witnessed the post-mortem of a horse killed by the gnats, and upon dissection it was found that not only was the anus entirely filled with the flies, but also the genital orifices, the nasal passages, and the bronchial tube and its ramifications. As to remedies, he states that it is customary to drive them away by smoke. A salve which he recommends very highly for anointing the cattle is prepared as follows: Take 2 pounds of tobacco leaves and boil in 20 pounds of water until half is...

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