50 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 
accomplish their work, and the leaf Ioses vitality. Where these insects 
have made a puncture on the rib, a woody scar remains, and where 
these scars are numerous those parts of the leaf farthest from the main 
ribs are thinner and more flaccid than in healthy leaves; and such 
leaves, and no others, are affected by the “honey dew.” A few of the 
leaves turn brown, but the vine is not in the least injured and the qual- 
ity or quantity of the crop is not in the least affected. 
The same remedies used against the Aphis will prove useful against 
these insects. 
In addition to the insects hereinbefore enumerated, there are a few 
beetles, belonging to the Chrysomelide or leaf-eating beetles, and prin- 
cipally the tlea beetles. Most common of the latter is the red-headed 
flea beetle (Systena frontalis), a black beetle about a quarter of an inch 
in length, with a red head, and with very heavy hind legs; a good 
jumper and no mean flyer. Next comes the striped flea beetle (Phyllo- 
treta vittata), a black beetle less than one-tenth of an inch in length, with 
two yellow stripes on the wing covers. Finally comes the punctured 
flea beetle (Psylliodes punctulata), a brownish species, less than one- 
sixteenth of an inch in length. None of these are very numerous, and 
they are not found in all yards nor all together in any one yard. They 
eat small holes in the leaves and do no great damage. 
The twelve-spotted leaf beetle (Diabrotica 12-punctata), a yellow bee- 
tle about a quarter of an inch in length, with twelve spots on the wing 
covers, has the same habit, and appears in small numbers in all yards. 
