Walsli calculated that, if not cliecked, they would reach the Atlantic 

 States about the year 1880. The eggs, to the number of seven hundred 

 to twelve hundred, are deposited on* the young leaves of the potato. 

 These eggs are attached by one end to the under side of the leaves^ 

 usually in clusters of one to two dozen. The larvie hatch out in a few 

 dayis, and feed from seventeen to twenty days. They then bury 

 themselves in the earth, where they change into pupie, and remain 

 as pupfe from ten to twelve days, and finally emerge from the eartli 

 as perfect beetles to deposit more eggs for a second generation. In 

 order to give some idea of their powers of multiplication and the 

 injury eifected by them, the Canadian Entomologist states that all 

 their transformations are effected in fifty days, so that the result of 

 a singe pair, if allowed to increase without molestation, would, in one 

 season, amount to over sixty millions. And Mr. Walsh, after a care- 

 ful examination of facts, states that in one year (18G6) these insects had 

 destroyed one and a quarter million dollars' worth of potatoes in one 

 small portion of the United States which came under his observation. 

 The insect, after laying its eggs, does not die immediately, Professor 

 Daniels, of Wisconsin "University, having kept a female alive six weeks 

 without food after she had laid 'twelve hundred eggs. There are said 

 to be three broods annually in Missouri and Illinois, the last brood re- 

 maining under ground all winter, and appearing as perfect beetles the 

 following spring. This insect is stated to possess poisonous properties 

 when incautiously handled ; but the Canadian Entomologist has been 

 unable to find any evidence of poisonous properties, and doubts the 

 statement. It feeds upon the potato, tomato, egg-plant, thorn-apple, 

 and black henbane, &c., &c. 



There are several parasitical insects which destroy the Colorado potato- 

 bug, but their numbers will not admit of their being enumerated in this 

 article. Among the principal ones are several plant bugs, Anna, Rar- 

 pactor, &c.; some beetles, Lehia, Coccinella, &c. ; a two-winged fly, 

 TacMna, besides several other insects which prey upon it in the larval 

 state, and serve essentially to lessen the number of these pests. These 

 insects should by all means be protected in the potato-fields and 

 suffered to increase. The larva of the Colorado potato-bug' is at first 

 dark reddish-brown, but becomes paler, and brightens as it matures. 

 The head is black, and it has a ring of black on the first segment of its 

 body, and two rows of black spots on each side. The perfect insect is 

 about half an inch in length, of a thick, oval shape, and of a yel- 

 lowish cream color, with ten black lines running lengthwise down the 

 wing-covers. The head and thorax are of an orange-brown color, 

 spotted and marked with black. There is another insect closely resem- 

 bling the true Colorado bug in form, coloration, and markings^ 

 this is called the Borypliora juncta, and may be distinguished by having 

 the second and third stripes always united behind, and sometimes 

 before, giving it the appearance of having only eight stripes instead of 

 ten on the wing-covers. This insect has not yet been reported as hav- 

 ing done any material injury to the potato, although in Alabama it has 

 been said to injure the potato slightly, and is found in Maryland, Vir- 

 ginia, and South Carolina, feediug on the Solanum caroUnense, and 

 sometimes iujures egg-plant in the South. A second insect, the three- 

 lined potato-beetle, {Lema trltineata,) has also recently been mistaken 

 for the Colorado bug, but may readily be recognized by its smaller size, 

 more elongate form, and having only three longitudinal black lines on 

 its reddish-yellow wing-covers. The larva may also readily be dis- 

 tinguished by its habit of carrying a disgusting mass of excrement on 



