. The American florist : a weekly journal for the trade. Floriculture; Florists. rgoo. The American Florist. 971 while its work is very similar to that produced by the Cecidomyiaaffinis, yet a comparison of the adult gall-gnats with the description of the last mentioned species reveals the fact that the two are very distinct, not only differing in the venation but also in the structure of the antenna'. Following is a description of our species; in both sexes three-fifths as long as the body, 14 jointed (2x12), the ti^^t two joints subequal in length, each as broad as long; third join
. The American florist : a weekly journal for the trade. Floriculture; Florists. rgoo. The American Florist. 971 while its work is very similar to that produced by the Cecidomyiaaffinis, yet a comparison of the adult gall-gnats with the description of the last mentioned species reveals the fact that the two are very distinct, not only differing in the venation but also in the structure of the antenna'. Following is a description of our species; in both sexes three-fifths as long as the body, 14 jointed (2x12), the ti^^t two joints subequal in length, each as broad as long; third joint more than twice as long as the second and more slender, other joints becoming successively slightly shorter except the last one; joints three to thirteen each slightlyconstricted near the middle, narrowed at the apex into a petiole, which, on the thirteenth joint, is almost one-half as long as the thickened portion of the j oint; t wo whorls of bristly hairs on each of the joints from three to thirteen inclusive, one near the base, the other near the apex of the thickened portion. Head and thorax black, the hairs yellow; antenna and legs brown, halteres yellowish, scutellum and abdomen bright yellow, the hairs also yellow. Wings gray, strongly iridescent, thickly covered with short hairs; first vein extending rather close to the costa, terminating slightly before the middle of the wing; third vein terminat- ing distinctly below theextremetip of the wing, its basal portion, connecting with the first vein, imperceptible; fifth vein forked near the middle, the anterior fork terminating midway between the apex of the posterior fork and of the tip of the third vein. Length to The remedy generally employed against this pest consists in picking off and destroying the infested leaves. It is also amenable to the hydrocyanic acid gas remedy, as detailed in Circular No. 37, 2d Ser., of this Division and undoubtedly also to the buhach ir>»c t powder, recom- mended as a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
