. Bulletin of the Department of Agriculture. Agriculture. WALNUT APHIDES IN CALIFORNIA. 33 head and six on the pro thorax. Tibiae armed with a row of short bristlea on their inner margins. Beak pale, the extreme tip dusky, extending a little beyond the anterior coxse. The young o\'iparous female is entirely pale yellow and can be dis- tinguished from the young viviparous female only by its more eliptical shape, that of the latter being more oval. Measurements: Length of body, mm.; width of body, mm.; antenna, joint I, mm.; joint II, mm.; joint III, mm. joint IV
. Bulletin of the Department of Agriculture. Agriculture. WALNUT APHIDES IN CALIFORNIA. 33 head and six on the pro thorax. Tibiae armed with a row of short bristlea on their inner margins. Beak pale, the extreme tip dusky, extending a little beyond the anterior coxse. The young o\'iparous female is entirely pale yellow and can be dis- tinguished from the young viviparous female only by its more eliptical shape, that of the latter being more oval. Measurements: Length of body, mm.; width of body, mm.; antenna, joint I, mm.; joint II, mm.; joint III, mm. joint IV, mm.; joint V, mm.; joint VI, mm.; filament, mm. Cauda, mm.; cornicles, mm. Described from numerous specimens, Walnut Creek, Cal., October, 1912. WINGED MALE (fIGS. 17; IS, 6). General color pale green or greenish yellow. Head and prothorax olive-green. Frontal margin of head and frontal margin of prothorax, black. Prothorax with two. — MonelliacaryeUa: Winged male. (Original.) blimtly rounded dusky tubercles on the dorsum. Dorsum of head and thorax with indefinite dusky markings. Eyes red. Antennae dark olive-green, about three- fourths of the body in length; joiat VI longer than its filament. Sensoria as follows: III, about 21: IV, 7 to 9; V, 6 to 10; VI, 2 to 4 (besides the usual apical). Wings of mod- erate size; insertions and subcosta greenish-yellow; stigma light brown, with a paler central area; discoidals 1 and 2 thicker than the other veius and with a narrow smoky border; stigmatic vein obsolete except for its apical thu'd; veins brown. Legs pale greenish-yellow; coxse, trochanters, apical five-sixths of femora, and basal four-fifths of tibiae black; tarsi gray. Thoracic lobes and scutellum black. Under the wings. 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
Size: 1622px × 1540px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
