. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. CIIKYSOTIS. no eyes nro soparnlcd l»j' tlic face, wliich is ('oniparativcly Itroatl for u mule; tlie lact' lias a ratliiT distiiirlly illnt^tâ¢^â¢s('(l iiiiddh' line, is of ji inctallic-grc't'ii t'olur, l)Ut opacjuo dii acctount of llio cover of whitish (lust. I'alpi black, tlicir whitish iniwdcr oidy bocoiiics visible when seen in a very obiicjuo direction. Antenna- Mack, of middle size, their tidrd j(»iiit is somewhat lounger than in most of till' other species, hairy, and of a somewhat irreu-n
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. CIIKYSOTIS. no eyes nro soparnlcd l»j' tlic face, wliich is ('oniparativcly Itroatl for u mule; tlie lact' lias a ratliiT distiiirlly illnt^tâ¢^â¢s('(l iiiiddh' line, is of ji inctallic-grc't'ii t'olur, l)Ut opacjuo dii acctount of llio cover of whitish (lust. I'alpi black, tlicir whitish iniwdcr oidy bocoiiics visible when seen in a very obiicjuo direction. Antenna- Mack, of middle size, their tidrd j(»iiit is somewhat lounger than in most of till' other species, hairy, and of a somewhat irreu-niar form, because that part, where the arista is inserted, is soniewhai produced in the shape of a lolje. Front metallic-green, dull on account of l)rownish-yellow dust. Coxa' and femora black, the latter with a frreen metallic lustre; the second joint of the fore coxtc, the tips of all the femora, all the tibiu( and all the tarsi as far as the tip of the first joint, yellow, the end of the feet brownish-black. Hairs and l)ristles upon the feet very short, the liristles also very few in number. I'ulvilli of the fore tarsi rather small. Cilia of th<^ tcfruhe black. Wings somewhat grayish, with a rather protruding anal angle; the costa shows no thickeiung; the last segment of the fourth longitndiiuil vein is scarcely a little inflected, jtarallel with the third and ends inunediately before the extreme tijt of the wing. lldh. Illinois. (TiC IJaron.) Ohiicrvalion.âIt is not necessary, wlion identifying this species, to pay too much attention to the shape of the third joint of the anteiMue, as it sometimes changes its form, especially when recently develojted s})ecimens dry up. The seiiarated eyes, the black cilia of the tegula?, the color of the feet, and the costa without a thick- ening, are characters which prevent its being confounded with any other species known to nic. 2. Cilia of the tegiilre pale. a. Costa of the male thickened. T. C. costalis LoEW. % and 9-âV
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectinsects, bookyear1864
