 | Thaddeus William Harris, Massachusetts. Zoological and Botanical Survey - 1841 - 484 páginas
...on the leaves as early as the first of June, but do not usually appear in considerable numbers till the twentieth of the same month. How long they are...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Samuel Bowne Parsons - 1847 - 302 páginas
...first of June, but do not usually appear in considerable numbers till the twentieth of the same mouth. How long they are in coming to maturity, I have not...points; and there are two small, triple-pointed warts on'the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures... | |
 | Samuel Bowne Parsons - 1847 - 300 páginas
...form, but are not quite so convex. They have a small, round, yellowish head, with a black dot on cach side of it, and are provided with twenty-two short...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Joseph Breck - 1851 - 346 páginas
...existence in the caterpillar state probably does not exceed three weeks. They somewhat resemble the youno- of the Saw-fly, in form, but are not quite so convex....triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Thaddeus William Harris - 1852 - 536 páginas
...the caterpillar state probably does not exceed three weeks. They somewhat resemble young slug-worms in form, but are not quite so convex. They have a...triplepointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Joseph Breck - 1856 - 410 páginas
...on the leaves as early as the first of June, but do not usually appear in considerable numbers till the twentieth of the same month. How long they are...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Samuel Bowne Parsons - 1860 - 334 páginas
...short legs. The body is green above, paler at the sides, and yellowish beneath; and it is soft, aud almost transparent like jelly. The skin of the back...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Thaddeus William Harris - 1862 - 700 páginas
...the caterpillar state probably does not exceed three weeks. They somewhat resemble young slug-worms in form, but are not quite so convex. They have a...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Thaddeus William Harris - 1862 - 676 páginas
...slug-worms in form, but are not quite so convex. They have a small, round, yellowish head, with a bkck dot on each side of it, and are provided with twenty-two...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
 | Joseph Breck - 1886 - 492 páginas
...on the leaves as early as the first of June, but do not usually appear in considerable numbers till the twentieth of the same month. How long they are...triple-pointed warts on the edge of the first ring, immediately behind the head. These gelatinous and sluggish creatures eat the upper surface of the leaf... | |
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They somewhat resemble the young of the saw-fly in form, but are not quite so convex. They have a small, round, yellowish head, with a black dot on each side of it, and are provided with twenty-two short legs. The body is green above, paler at the sides,... 
