. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE PEA APHIS WITH RELATION TO FORAGE CROPS. 19 Measurements (average) from three specimens, immediately after placing in balsam and before shrinkage occurs: Length of body, mm., to tip of cauda, , width, ; length of wings, mm., width, ; length of cornicles, mm.; length of cauda, mm.; length of hind tibia, mm. Measurements of antennal segments: I. II. III. IV. V. VI, base. VI, fila- ment. Mm. .156 Mm. .078 Mm. .817 ' Mm. .730 .716 .677 .658 .658 Mm. 0.
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE PEA APHIS WITH RELATION TO FORAGE CROPS. 19 Measurements (average) from three specimens, immediately after placing in balsam and before shrinkage occurs: Length of body, mm., to tip of cauda, , width, ; length of wings, mm., width, ; length of cornicles, mm.; length of cauda, mm.; length of hind tibia, mm. Measurements of antennal segments: I. II. III. IV. V. VI, base. VI, fila- ment. Mm. .156 Mm. .078 Mm. .817 ' Mm. .730 .716 .677 .658 .658 Mm. .748 .735 .735 .658 .677 Mm. .296 .329 .310 .310 .290 Mm. .987 .968 .968 SEXUAL FORMS. Winged male (fig. 7).-—(Described from two specimens, Dec. 4, 1912.) Head and pro thoracic segment gamboge with a dusky to. Fig. 7.—Macrosiphum pisi: Winged male, much enlarged; c, antenna of same, more enlarged. (Original.) brownish longitudinal median dorsal marking which does not extend quite to tip of head. Thoracic shield brownish with interstices con- colorous with head. Abdomen pale green with pale dusky markings as shown in the illustration (fig. 7) and the segments posterior to the cornicles pale yellowish green. Eyes very dark red, almost black. Antennae (fig. 7, a) noticeably longer than body; filament of VI longer than III; entire antenna blackish excepting segments I and II and. 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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