768 JOURNAL OF FORESTRY 



Hill No. 7 was double, both ya and yh being rather small. The in- 

 habitants were red-and-black. The nearest pine was lo feet distant 

 and its leaves were yellow. Eight of the surrounding trees were dead, 

 three leafless and five with red leaves, and one had sorrel leaves.^^ All 

 nine of these showed infection. The red-leaved trees have the living 

 bark beetles, while the leafless trees show their galleries. In the sorrel 

 tree this was not present and there was attempted healing {cp. p. 9 and 

 fi?- 3)- Of the living trees (one-half inch by 2 feet to 2 inches by 9 

 feet) surrounding this area, 14 showed evidences of "Graves' disease" 

 and six did not. No ants nor aphids were observed on the adjacent 

 trees.^'^ 



Hill No. 8 was in a patch of bayberry (Myrica carolinensis Mill.) in 

 a nearly pineless blank, 50 feet in diameter. The ants were red-and- 

 black {F. exsectoides) . There was one living pine (one-half inch by 

 18 inches) within 10 feet which was not diseased. Eight dead (leaf- 

 less) trees within the area showed the disease and most of them the 

 Scolytid work. These trees were one-half inch by 4 feet to i^ inches 

 by 6 feet. Two trees had red leaves, showed the disease, and had 

 Scolytid infestation, the eggs being hatched. These trees were i inch 

 by 5 feet to ly^ inches by 8 feet. One had spiral grain (left to right). 

 A smaller red-leaved tree (one-half inch by 2 feet) also had Scolytid 

 infestation, but might have been shade-killed. Of the adjacent living 

 trees, one (2 inches by 6 feet) had the disease and an anthole (F. ex- 

 sectoides) under the roots, but no ant-aphid infestation above; one (3 

 inches by 10 feet) had the disease to a slight extent, but no ant nor 

 aphid infestation; 13 (one-half inch by i foot to 3 inches by 10 feet) 

 had the disease and insect infestation, and 17 of the same size did not. 



Hill No. 9 contained black ants and was the center of a 20-foot 

 blank. Of the trees adjacent to the blank, one was dead and showed 

 Scolytid infestation, but the disease was not evident. The others were 

 living and only one (2 inches by 8 feet) showed the disease definitely, 

 though there were some doubtful traces of an old infestation.^* There 

 was no insect infestation on these trees. Size, one-half inch by 2 feet 

 to 3 inches by 10 feet. 



Hill No. 10 had the red-and-black ants. It was the center of a 30- 

 foot blank. Of the adjacent trees, nine (i inch by 2 feet to 2 inches by 

 10 feet) were dead, all showed the disease, and at least eight had the 



"Leaves of sorrel-top trees are a pale yellow green in color, reddish toward 

 the tip, and i to ij^ or 2 inches long. 

 " Might be present on a day with less wind. 

 " Cp. below and fig. 3. 



