. Bulletin - Biological Survey. Zoology, Economic. 90 BIEDS OF A MAEYLATs^D FAEM. exuding sap, had oviposited in the holes, and the next generation, having thus gained an entrance, had finished the deadly work begun by the sapsuckers. Holes made by birds are sometimes closed b}^ burl-like knobs of wood, but if they remain open the death of the tree from borers is very likely to result. In the case of the trees killed at Marshall Hall, galleries made by borers had honeycombed the wood beneath the section of bark riddled by the sapsuckers. Onh' 2 stomachs of sapsuckers were collected. The}' were
. Bulletin - Biological Survey. Zoology, Economic. 90 BIEDS OF A MAEYLATs^D FAEM. exuding sap, had oviposited in the holes, and the next generation, having thus gained an entrance, had finished the deadly work begun by the sapsuckers. Holes made by birds are sometimes closed b}^ burl-like knobs of wood, but if they remain open the death of the tree from borers is very likely to result. In the case of the trees killed at Marshall Hall, galleries made by borers had honeycombed the wood beneath the section of bark riddled by the sapsuckers. Onh' 2 stomachs of sapsuckers were collected. The}' were taken during the middle of November, 1899 and 1900, and contained several dung-beetles {ApJiodius) and the fruit of woodbine and red cedar. The red-headed woodpecker is not common at Marshall Hall, though it was seen in small numbers every fall. One specimen taken Xovem-. ^m Fig. 32.—Flicker. ber 29,1900. among the swamp oaks south of lots 1 and 5, had eaten gall insects (Cynipid^) and many bits of the woody tissue of the gall. This woodj^ecker makes about half its food on vegetable matter, largely mast with some berries, and selects for its insect food chiefly beetles, ants, and grasshoppers. It is, on the whole, useful. The flicker (fig. 32). though nesting on the farm, was common only during migration, when it was seen in flocks of from 6 to 12. A stomach collected in the middle of November, 1899, contained 10 ground-beetles (including AnisodactyJus, Hcrrpalus j^ennsylvanicus^ and Pterostichus sayi)^ 5 ants, 1 sow bug, 1 black cricket and skin, and 20 seeds of woodbine berries. The flicker is somewhat more insectiv-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Biological Survey. Washington : Govt. print. off.
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