. Diptera Nematocera (excluding Chironomidæ and Culicidæ). Diptera. 180 ;. proximad of, and in a line with, the main length of the 3rd vein is really the 4th longitudinal,* and that it is coalescent with the 3rd vein at about the basal angle formed by the latter (as takes place in two subfamilies of Mycetophilidje t) ; forking afterwards at a varying distance according to the species. The 5th and 6th veins present, and apparently occasionally the 7th posterior cross- vein absent. Upper basal cell present, lower one absent. Anal lobe of wing distinctly angular. Banr/e. World-wide. Lif
. Diptera Nematocera (excluding Chironomidæ and Culicidæ). Diptera. 180 ;. proximad of, and in a line with, the main length of the 3rd vein is really the 4th longitudinal,* and that it is coalescent with the 3rd vein at about the basal angle formed by the latter (as takes place in two subfamilies of Mycetophilidje t) ; forking afterwards at a varying distance according to the species. The 5th and 6th veins present, and apparently occasionally the 7th posterior cross- vein absent. Upper basal cell present, lower one absent. Anal lobe of wing distinctly angular. Banr/e. World-wide. Life-history. The metamorphoses of a few species are known. The larvae live in rotting vegetable matter and human ordure, although exceptions appear to occur, as one European species, 'S*. scutellata, Lw., is said to feed on the honey-dew of AphidvE in the autumn. Scatopse larva? are apodal, cylindrical, with two short points on the sides of the thoracic portion, and also on the eight abdominal segments at the base, the last segment terminating in two divergent setae. Most of the species in the perfect state are sluggish in their movements and appear at times in immense swarms ; nearly all the species occurring in England, for instance, having been recorded as swarming in this manner at some time or other. The imagos are found tolerably freely on umbelliferous flowers, en windows of conservatories, in outhouses, near open drains, and more or less generally distributed. Many are spring species, some autumnal. 134. Scatopse brunnesceiis, Brmi. Scatopse brunne^cens, Brunetti, Rec. Ind. Miis. iv, p. 281 (1911). $ . Whole body and legs dark shining brown, sliglitly yellowish, tinged here and there witli short whitish pubescence. Head : antennae with 2nd scapal joint a little longer than the 1st, followed by six short, wide, rounded, flagellar joints, with a long (equally broad at its base), conical terminal joint ; the whole antenna with close greyish pubescence. Abdomen with the dor
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdiptera, bookyear1912
