. Bulletin. Natural history; Natural history. 350 Illinois Natural History Si"b\'ey Bcu-etix. Fig. 40. Cockscomb galls on upper surfaces of leaves of the white elm, Ulmus americana. caused by Colopha ulmicola (Fitch): Oakwood. June 29, 1929. A similar gall is caused by Colopha (jraminis (Monell). Genus ERIOSOMA Leach Keii to the Species of the Genus Eriosoma Fifth antennal segment (Fig. 223) usually without well-devel- oped annular secondary sensorial curling leaves of elm mimica n. sp. p. 353 Fifth antennal segment usually with well-developed annular secondary sensoria: curling leaves of
. Bulletin. Natural history; Natural history. 350 Illinois Natural History Si"b\'ey Bcu-etix. Fig. 40. Cockscomb galls on upper surfaces of leaves of the white elm, Ulmus americana. caused by Colopha ulmicola (Fitch): Oakwood. June 29, 1929. A similar gall is caused by Colopha (jraminis (Monell). Genus ERIOSOMA Leach Keii to the Species of the Genus Eriosoma Fifth antennal segment (Fig. 223) usually without well-devel- oped annular secondary sensorial curling leaves of elm mimica n. sp. p. 353 Fifth antennal segment usually with well-developed annular secondary sensoria: curling leaves of elm or closely clustered on branches (Fig. 42). leaves, or bark (Fig. 43) of elm. apple, and hawthorn 2 Sixth antennal segment usually without annular secondary sen- soria: causing a leaf cluster or rosette on terminal twigs of elms [fundatri,genia] lanigera ( Hausmann) p. 351 Sixth antennal segment usually with annular secondary sen- soria: never causing a leaf cluster; on roots, twigs, or branch- es, rarely leaves 3 Medial vein of fore wing with point of origin of fork much be- yond, or distad of, point of origin of radial sector: forming flocculent colonies on trunk and branches of elms (Fig. 43 ) ... rileyi Thomas p. 354 Medial vein of fore wing with point of origin little, if any. be- yond point of origin of radial sector: forming flocculent col- onies on trunks, branches, or roots of apple or hawthorn (Fig. 42) 4. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Size: 1723px × 1450px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
