 On the under side it is of the same color, but not variegated in the same way, there being a dark spot in the middle of each ring. The feet are brown, the under side of the head is puffed out and white. The antennae are extremely small and spring from...  The Animal Parasites of Sheep - Página 25por United States. Bureau of Animal Industry - 1890 - 222 páginasVista completa - Acerca de este libro
 | Missouri. State Board of Agriculture - 1869 - 786 páginas
...side of the head is puffed out, and white. The antenae are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under...distinctly visible on the top of the head. It has no mouth and cannot therefore take any nourishment. The wings are transparent and extend beyond the body,... | |
 | Pennsylvania. State Board of Agriculture - 1890 - 660 páginas
...side of the head is puffed out and white. The antennae are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under part of the head. It has no mouth and cannot therefore take any nourishment. The wings are transparent and extend beyond... | |
 | 1896 - 786 páginas
...side of the head is puffed out and white. The antenna are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under...distinctly visible on the top of the head. It has no mouth and can not, therefore, take any nourishment. The wings are transparent and extend beyond the... | |
 | Herbert Osborn - 1896 - 328 páginas
...side of the head is puffed out and white. The antennae are extremely small aud spring from two lobe^ which are sunk into a cavity at the anterior and under...three small eyelets are distinctly visible on the toil -of the head. It has no mouth and can not, therefore, take any nourishment. The wings are transparent... | |
 | William Brodbeck Herms - 1915 - 428 páginas
...side of the head is puffed out and white. The antennae are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under...distinctly visible on the top of the head. It has no mouth and cannot, therefore, take any nourishment. The wings are transparent and extend beyond the... | |
 | 1896 - 322 páginas
...side of the head is puffed out and white. The antennae are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under...distinctly visible on the top of the head. It has no mouth and can not, therefore, take any nourishment. The wings are transparent and extend beyond the... | |
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