782 REPORT UNITED STATES GEOLOGICAL SURVEY. 



Fig. 49 illustrates an ichneumon-para- 

 site of the viue-dresser, Chccnocainpa pam- 

 pinating, reared at Salem, Mass., by Mr. 

 Emerton, by whom the drawings of both 

 were made. Professor Riley notices a 

 species of Microgaster and ichneumon, an 

 undescribed vspecies of Blacus, a braconid 

 ichneumon, which preys on the five-spot- 

 ted sphinx. 



The moth in the Northern States ap- 

 pears in June, without doubt, though 1 

 have not personally seen them, lays its 

 eggs on the leaves, probably the under 

 side, and the caterpillar lives about six 

 Fig. 49.— Ichneumon-parasite of weeks, attaining its full size from the 

 Viue-Dresser. middle of August until the first of Sep- 



tember, going under ground in September and early October. During 

 this month I have frtquently seen the moths at twilight in Amherst, 

 Mass., flying about the flowers of the petunia, probing their deep 

 tubular cerollas with their long tongue. Our figure, (47,) copied from 

 Harris, will sufficiently indicate the size and transformations of this 

 common moth, the caterpillar of which, in the Northern States, often 

 passes under the name of the tomato or potato worm. 



The caterpillar is rather dark green, with seven oblique greenish- 

 yellow stripes on the side of the body. The chrysalis may be known 

 by the large, conspicuous tongue-case which projects from the body like 

 the handle of a pitcher. 



In the Macrosila 5-maciilata there is no white spot at the base of the 

 fore wings, and on the hind wings are two distinct angulated bands. 



The Carolina moth is ash-colored, with a white spot at the base of the 

 fore wings, while the central band of the hind wings is indistinct. The 

 caterpillar feeds on the tobacco and the tomato. It is dark green, with 

 lateral, oblique, white bands, edged above with bluish and short trans- 

 verse black stripes. The tongue-case is shorter and less curved than 

 in the five-spotted sphinx. 



INSECTS INJURING THE GRAPE. 



The Grape Phylloxera, Pemphigus vUifolke Fitch; Phylloxera 

 vastatrix Planchon. — What the Colorado potato-beetle is to the potato, 

 the Hessian fly to wheat, and the canker-worm is to the apple, the 

 phylloxera is to the grape. This amounts to saying that the vine is in 

 danger of extermination from the latter insect. My attention has been 

 drawn for two years past, while spending a few weeks in September at 

 the Agricultural College in Amherst, to the ravages of this pest, by 

 Professor Maynard. In the autumn of 1875, we found it in abundance 

 on the leaves of several varieties in the vineyard on the college farm, 

 while this year, in company with Professor Maynard, I examined the 

 roots and found the following varieties more or less infested bj' the root- 

 variety of this plant-louse: Clinton, Agawam, Concord, lona, Delaware, 

 Adirondack, Israella, Isabella, Wilder, and the native grape under 

 cultivation; the Clinton was affected more than the others, and the 

 Concord much so when growing in a slightly damp, ill-drained and par- 

 tially shady place. 



I am not aware that this formidable pest, which has occasioned such 

 consternation in Europe, has been detected before in New England, 



