. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. DESCRIPTION OF THE SPECIES. 299 the anterior edj^e of tlie oral opouiiig; proboscis not {jrcniouliiled. The ground colur uf tlie npjier side of tlie tliurax is black, Ixit, in consequence of its j)ulveriiicnce und <tf its sliort, yelluwisii piit", it npi)ears gray; upon its anterior margin, in ti;e viciiiily of the ycllowisli humeral callus, there are some blackish hairs; the ordinary bristles, of which I perceive only two juiirs upon the middle of the dorsum, are brown. The lateral margin o
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. DESCRIPTION OF THE SPECIES. 299 the anterior edj^e of tlie oral opouiiig; proboscis not {jrcniouliiled. The ground colur uf tlie npjier side of tlie tliurax is black, Ixit, in consequence of its j)ulveriiicnce und <tf its sliort, yelluwisii piit", it npi)ears gray; upon its anterior margin, in ti;e viciiiily of the ycllowisli humeral callus, there are some blackish hairs; the ordinary bristles, of which I perceive only two juiirs upon the middle of the dorsum, are brown. The lateral margin of the thoracic dorsum is yellow; scutellum yellow, with four bristles, Metanotum und pleura? blackish-l)rown ; the latter rather shin- ing; the bristles upon them for the most part black. The ground color of the abdomen is yellow ; it has four rows of brownish- black spots, which begin to upon the third segment; uj)on the fourth and the following segments they coalesce in such a manner that the segments appear altogether blackish-brown. The pile upon the abdomen is generally whitish-ydlow, but ujjon the black spots it is black; the bristles upon the posterior margin of the posterior segments are generally l)lack. The rather broad ovipositor is of a shining bhukish-brown, flattened, although somewhat swollen at the basis; its short and very delicate pile is not easily discernible; it seems to be l)ro\vnish. Femora brownish-black, the anterior ones with long black bristles; the root and the tip dark yclhjw. Til)ia3 and tarsi rather dark yellow; wings of the ordinary shape, blackish-brown, sparsely guttate; the root of the wings, almost as far as the tip of the small basal cells, is rather liyaline and almost altogether iramacnlate; the alula also, bears no si)ots and is without dark coloring; the brown coloring begins on the anterior margin about the middle of the costal cell, and includes before its end a rather large hyaline drop, close by the margin; a smalle
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects
