. Leptididae. 153 Yowls not produced below tlie eyes, horizontal. Antennæ three- jointed, the basal joint sonietimes large and thickened, the second small, the third produced downwards, somewhat reniforni, with an arista going out from the upper part of the front edge. Eyes bare, the upper facets in the male larger than the lover, the dividing line nioderately sharp. With regard to the mouth parts I have only been able to exaniine the male, and for the female I must depend on Becher's description; as in Atherix the mouth parts are difterent in the two sexes, the female being in possession of m
. Leptididae. 153 Yowls not produced below tlie eyes, horizontal. Antennæ three- jointed, the basal joint sonietimes large and thickened, the second small, the third produced downwards, somewhat reniforni, with an arista going out from the upper part of the front edge. Eyes bare, the upper facets in the male larger than the lover, the dividing line nioderately sharp. With regard to the mouth parts I have only been able to exaniine the male, and for the female I must depend on Becher's description; as in Atherix the mouth parts are difterent in the two sexes, the female being in possession of mandibies. The proboscis is not long, the basal part of labium short, the labella longer than the basal part, moderately broad, somewhat protruding; the labrum is nearly as long as the proboscis, the maxillæ of a similar lengtli, pointed, somewhat semitubular; in the females the mandibies are rather strong chiti- nous blades; the hypopharynx is slender but as long as the labrum. As men- Fig. 45. Antenna of tioned under Atherix Becher says that ^- cmssicomis. the males of Atherix and Sijmphoromyia seeui to want the hypo- pharynx; this is incorrect, at all events with regard to the present genus, then I found a hypopharynx in the male that was easily seen but slender, and with a distinct salivary duet. I therefore think it certain that a hypopharynx is also present in Atherix; according to Becher this genus has a short hypopharynx in the female, perhaps then this organ in the male is short and slender and easily escapes observation: it is very iniprobable that the hypopharynx should be quite absent. The maxillary palpi are distinctly two-jointed, the basal joint fully half as long as the apical, this is slightly curved and densely clothed with long and strong hairs. Thorax is nearly quadratic. Abdomen is somewhat elongated, consisting of seven segments. The male genitalia are somewhat swoilen, with thick lateral appendages, in the female the abdomen terminates in an ovipositor w
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
