. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 84 DECIDUOUS FEUTT INSECTS AND INSECTICIDES. rior third of dorsum of abdominal segments 3-8 covered with very short, decumbent bhick bristles, the row not extending quite as far as the spiracles on either side. Cremaster Avanting, replaced by six very short black bristles which are nearly obsolete in some specimens and appear as black dots. Bristles arranged on the submedio-dorsal asj^ect of the anal segment as tw'o median pairs and one lateral bristle on the outside of the median pairs. Wing sheaths, and leg she
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 84 DECIDUOUS FEUTT INSECTS AND INSECTICIDES. rior third of dorsum of abdominal segments 3-8 covered with very short, decumbent bhick bristles, the row not extending quite as far as the spiracles on either side. Cremaster Avanting, replaced by six very short black bristles which are nearly obsolete in some specimens and appear as black dots. Bristles arranged on the submedio-dorsal asj^ect of the anal segment as tw'o median pairs and one lateral bristle on the outside of the median pairs. Wing sheaths, and leg sheaths of first pair of legs, subequal, antennal sheaths longer, all extending to about fifth abdominal segment, those of third pair of legs projecting slightly beyond. Length, 6-9 mm. Observations upon a number of pupae during the month of July, 1908, in Washington, D. C., show the minimum length of this stage to be 9 days, the maximum 12 days, while the average length for the period is days. The average number of days spent in the cocoon is 14,8. The average mean temperature for the month of July, or the time the pupa^ under observation were in the cocoons, was 78° ADULT. (Fis. 17.) Fig. 17.—The grape-leaf nmericana) : Male moth left, of femah- at right; Kkeletonizer i Hnrrixhui a, antenna of male at h, venation of front and Uniformly blue-black, except a yellow collar which extends nearly to ventral side. Wings, legs, and eyes similar in color to rest of body. Antenna^ pectinate, more so in male than in female, and plu- mose in male, length about five-sixteenths of an inch in male, four-sixteenths of an inch in female. Abdomen longer, more slender in male than in female and curved upward. Abdomen with a fan-shaped, somewhat bilobed caudal tuft. Length of moth, 8-11 mm.; length of wing, 11 mm. Expanse of wing, 22-24 mm. The following is the original description by Harris: TJlne-blnek, with a saffron cdlorod collar and a fan-shaiKMl, soniowliat bilolxMl, black caudal
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
