. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. flS^fF. 1 , â¢- 'i 1 i â '!â >.:,,;;.;.. * , .M-'',':i â¢V .â «â¢; 124 DIPTKHA OP i^)RTH AMKKICA. [part III. imiimturc spcoiiuoiis. Foot of a dirty clay-yellow, femora in the niiddii' and tarsi towards the tip, somewhat inriiseated. llalleres whitisli-yi'iiow. Wings whitisii-liyaline, with three broad, perpen- dicular, more grayisli-l)Ii;ek than black crossbaiuls. The lirst of these bands covers, near the anterior margin, the latter half of the costal cell, and reaches, without becoming more na
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. flS^fF. 1 , â¢- 'i 1 i â '!â >.:,,;;.;.. * , .M-'',':i â¢V .â «â¢; 124 DIPTKHA OP i^)RTH AMKKICA. [part III. imiimturc spcoiiuoiis. Foot of a dirty clay-yellow, femora in the niiddii' and tarsi towards the tip, somewhat inriiseated. llalleres whitisli-yi'iiow. Wings whitisii-liyaline, with three broad, perpen- dicular, more grayisli-l)Ii;ek than black crossbaiuls. The lirst of these bands covers, near the anterior margin, the latter half of the costal cell, and reaches, without becoming more narrow, the fourth or lifth longitudinal vein; in the lirst, case it becomes perccptildy paler between the third and fourth, iu the second case between the fourth and lifth longitudinal veins. The second band covers, near the anterior margin, the apical half of the stigma and reaches there, in most specimens, even a little beyond the end of the lir^t longitudinal vein ; without attenuating, it runs over the small crossveins as far as the fourth longitudinal vein, forms a very broad border along the section of the fourth vein lying I)et\\H'eu the two crossveins, and runs, afterwards, along the posterior crossvein towards the fifth longitudinal vein; its breadth is not the same in all specimens; when narrower, this crossband shows a distinct knee-shaped bend, depending ujion its passage from tlio small to the posterior crossvein (this is the case with the speeinu'ii figured by Mr. v. d. Wulp); when broader, this crossband extends, in the shape of a blackish-gray shadow, as far as the third posterior ceil, so that of the knee-shaped bend oidy a trace is left, which is due to a diluted spot upon the inner side of the crossband, near the posterior margin of the diseal cell (as repre- sented in ray figure). The thir' band covers, on the anterior margin, the end of the marginal cell to a considerable extent, Jiecomes gradually more narrow posteriorly and reaches more or les
Size: 838px × 2983px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects
