. Annual report. New York State Museum; Science; Science. 312 NEW YORK STATE MUSEUM Key to genera a Antennal segments globose with a smooth stem distally and ornamented only with whorls of long hairs. The 3d vein is well separated from costa and unites with the margin at or beyond the apex Joanissia Kieff. aa Antennae variable, frequently with crenulate wjiorls and subapically with variously formed chitinous structures; the 3d vein uniting with the margin before or near the apex Campylomyza Meig, JOANISSIA Kieff. This genus presents a very characteristic form and is easily sepa- rated from all
. Annual report. New York State Museum; Science; Science. 312 NEW YORK STATE MUSEUM Key to genera a Antennal segments globose with a smooth stem distally and ornamented only with whorls of long hairs. The 3d vein is well separated from costa and unites with the margin at or beyond the apex Joanissia Kieff. aa Antennae variable, frequently with crenulate wjiorls and subapically with variously formed chitinous structures; the 3d vein uniting with the margin before or near the apex Campylomyza Meig, JOANISSIA Kieff. This genus presents a very characteristic form and is easily sepa- rated from all other Cecidomyiids. The antennae in both sexes are composed of a number of segments, each consisting of a subglobu-. Fig. 30 Joanissia photophila Felt, sth and 10th antennal segments of male much enlarged. (Original) lar basal enlargement ornamented only with irregular whorls of simple setae and a smooth, cylindric stem distally [fig. 30]. The male has 14 and the female 11 antennal segments. The palpi are tri or quadriarticulate. The venation of the wing is very charac- teristic, as the third vein is well separated from costa, runs nearly parallel thereto and unites with the margin at or well beyond the apex; the fourth vein is simple. Nothing is known concerning the life history of our native forms, though Kieffer has recorded the rearing of several European species from decaying wood, from tufts of moss and also from a mold covering a fungus. It is very probable that our A\ forms live under similar conditions, particularly as they seem n70st abundant in the vicinity of forests or other conditions where decay- ing vegetable matter is present in some 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 New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
