96 INSECTS INJURIOUS TO THE POTATO. 
Chinch-bugs, in the Proceedings of: the Academy of Natural 
Sciences of Philadelphia, for May, 1867). 
Fig. 16. In the case of the Chinch-bug, the conditions 
favoring its development and health are entirely 
the reverse. It was during the unusually wet 
weather of 1865 that the great epidemic referred 
to prevailed, and at the same time the — Fig.17. 
Colorado potato bug flourished and mul- 
tiplied as favorably as it could desire ; 
but this year was one favorable to the development 
of the Chinch-bugs, and true to nature, they have 
increased so that a few can be found again. Since 
I observed this failure of development among the 
potato bugs, I have looked carefully for them in this ( Car- 
roll) and parts of the adjoining counties, and seldom find a 
patch with any bugs. At this date the early frosts have 
; : already killed the 
potato vines, hence 
their autumnal 
supply of food be- 
ing cut off we may 
expect a still more 
complete destruc- 
| tion of the bugs if 
the next autumn should be nearly as pleasant as the last. 
Of the Blistering Beetles (Oantharidw), I have observed 
this year the Striped Cantharis (Lytta vittata Fabr., Fig 16) 
unusually abundant, and quite injurious to potato vines, 
beet leaves, etc. The Margined Cantharis ( Cantharis mar- _ 
ginata Oliver, Fig. 17) were also moderately abundant, in- 
juring beets most. I also observed some of the Ash-colored - 
Cantharis (Lytta cinerea Fabr., Fig. 18, a, male), and the 
black Cantharis (Lytta murina Leconte, Fig. 18, b) on 
potatoes and beets. A species of Oil Beetle ( Melo? angusti- 
collis, Fig. 19) was also abundant, eating potatoes, beets, 
etc.,and injuring tomato fruit very much. Farmers all about 




