. Diptera Nematocera (excluding Chironomidæ and Culicidæ). Diptera. lilBIO. 167 female the eyes are oval, luuch smaller, bare, separated by a very broad flat frons, often nearly of half the width of the head; three ocelli on a small triangular distinct protuberance. Proboscis moderately prominent, with thickened hairy labella ; palpi varying m length, generally five-, but in some species four-jointed, the Ist joint small, the 3rd often thickened. Antenna? rather short and comparatively stout, cylindrical, generally of ten joints, but in some cases only nine; the joints set rather closely toget
. Diptera Nematocera (excluding Chironomidæ and Culicidæ). Diptera. lilBIO. 167 female the eyes are oval, luuch smaller, bare, separated by a very broad flat frons, often nearly of half the width of the head; three ocelli on a small triangular distinct protuberance. Proboscis moderately prominent, with thickened hairy labella ; palpi varying m length, generally five-, but in some species four-jointed, the Ist joint small, the 3rd often thickened. Antenna? rather short and comparatively stout, cylindrical, generally of ten joints, but in some cases only nine; the joints set rather closely together, the. Fig. 17.—Head of lii/uo : a front Mew of c? ; 5, side view of S ; c, front view of 2 .* last one rounded; the whole antenna not much longer than the head. Thorax much elevated, generally closely pubescent; scutellum small, semicircular. Abdomen elongate, conical; ot seven or eight segments. Genitalia consisting in male of a 'pair of two-jointed claspers, the 2nd joint incurved, conical; both generally densely pubescent. In the female the short ovipositor terminates in two small lamellae. Legs moderately long, robust, hardly longer than in the brachycerous families ; the hinder pair generally longer than the others ; fore femora usually thickened ; fore tibiaj prolonged into a stout, slightly curved spine, a smaller adjacent spine not infrequently being present. Hind femora and tibiae often incrassated distaljy, the latter with two small spurs at the tip ; hind metatarsus shorter than the remaining four joints taken together. Pulvilli, empodia, and claws well developed. Wings of considerable size, broad, with the costal vein ending before reaching the tip. Auxiliary and 1st longitudinal veins present, the 2nd absent, the 3rd present, simple,t all these ending in the costa between the middle and the tip of the wing. * In the figure eleven joints are incorrectly shown; there should be, at most, ten only. t As stated in the introduction to this family, it seems to me
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdiptera, bookyear1912
