Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . Fig. 23.—Phymatodes variabilis.— Smith, del. OAK-BORERS. 75 found at Providence, May 30, 1862, by Mr. George Hunt, under the barkof the oak (not the white oak); the beetle appeared June 8. We addthe following description of the larva of a closely allied species, , Fig. 24, which injures the trunk of the grape: The larva of the Grape Phymatodes.—Several years ago I received from Dr. Sliiner, ofIllinois, specimens of the larva
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . Fig. 23.—Phymatodes variabilis.— Smith, del. OAK-BORERS. 75 found at Providence, May 30, 1862, by Mr. George Hunt, under the barkof the oak (not the white oak); the beetle appeared June 8. We addthe following description of the larva of a closely allied species, , Fig. 24, which injures the trunk of the grape: The larva of the Grape Phymatodes.—Several years ago I received from Dr. Sliiner, ofIllinois, specimens of the larva, pupa, and adult of this pretty insect (CalUdiiim amcenmnof Say), which is not uncommon in our own State, So much alike are all the borersof this family of long-horned beetles that long and prolix descriptions and carefullydrawn figures of the mouth parts (wherein most of the differences lie) are absolutelynecessary for their identification. The larva (Fig. 24, b, head seen from above; c, seen from beneath) has a small head,which is a little mor.; than half as wide aa the prothoracic segment. This latter, be-. FiG. 24.—Grape Phymatodes: a, larva, 6, upper side; c, under side, ofhead of larva much enlarged.—From Packard. ing the segment immediately succeeding the head, is half as long as broad, with adistinct median suture and four chitinous patches; the two middle ones transverseand irregularly oblong, being about twice as broad as long, the outer spots being lon-gitudinal to the segment, and oblong in form, or about twice as long as broad. Thethree segments succeeding are of nearly equal length and width, being about half aslong as the prothoracic segment, and not much narrower. The body decreases inwidth towards the posterior half, wliich is of equal width throughout, the end sud-denly rounding off; the terminal tliree segments are indicated by very slightly-marked sutures, and together form a straight cylindrical portion nearly as long as thethree segments in adva
Size: 2272px × 1100px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtongovtprin
