. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Bui. 437, U. S. Dept. of Agriculture. Plate Work of Flat-Headed Borers. Fi(i. 1.—Ksrgs of Af/riluH lai. oi\ bark of trunk of while alder (AlnuH ilidmhijiilid). /i. Vui. .5.—Trunk of living white alder (A/min rliiiiiihi- folin) hiiowiiiK i-XK of « sp. and the .^aj) flowing from Ihe wounds hy the feeding of the young larv;i:. y,\. Flo. O.—Sec lions fn mi the I run k of a living white (/l/7/w.« W/'/m/z/yr^WH) nhowing old egg niii.'-ses on the Imrk, larval work under the har
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Bui. 437, U. S. Dept. of Agriculture. Plate Work of Flat-Headed Borers. Fi(i. 1.—Ksrgs of Af/riluH lai. oi\ bark of trunk of while alder (AlnuH ilidmhijiilid). /i. Vui. .5.—Trunk of living white alder (A/min rliiiiiihi- folin) hiiowiiiK i-XK of « sp. and the .^aj) flowing from Ihe wounds hy the feeding of the young larv;i:. y,\. Flo. O.—Sec lions fn mi the I run k of a living white (/l/7/w.« W/'/m/z/yr^WH) nhowing old egg niii.'-ses on the Imrk, larval work under the hark, aii<l the "; fonmil in llic hnrk wln-n llie altaek not Hevere enough to kill Ihe tree. The hrond died in I he lurviil stage; and the wound will euusi; a check In tliu wood. XI- (l'h(Hogra|)hs hy 11. K. lliirke.) (Original.). 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. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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