. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. (;.V.â IN rUtlD; ("IION. 3 Tho frontal fisstiro is distinct, hut the froiitnl hiiuilc is not piislicd lip US far as tlir I'ltPiit, so as to sccni to form a part of it ; on tlic C'liiti'iiiT, it tipp<'ars iis tlir upprr part of tlic fare. Vilirissii', swell US \\\v\ appear in all tlic jjcin'raof Uf/(iiiii/:i(!ir, are not extant. Tlie clypeiis is always distinct. Tin' ])alpi are ratlicr lirond ; the ])rol)oscis more or less stout. Tlie nictalliorax is larger than usual, very iiinel


. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. (;.V.â IN rUtlD; ("IION. 3 Tho frontal fisstiro is distinct, hut the froiitnl hiiuilc is not piislicd lip US far as tlir I'ltPiit, so as to sccni to form a part of it ; on tlic C'liiti'iiiT, it tipp<'ars iis tlir upprr part of tlic fare. Vilirissii', swell US \\\v\ appear in all tlic jjcin'raof Uf/(iiiii/:i(!ir, are not extant. Tlie clypeiis is always distinct. Tin' ])alpi are ratlicr lirond ; the ])rol)oscis more or less stout. Tlie nictalliorax is larger than usual, very iiineli projcotiiif? interiorly and posteriorly. The feet short and strontr, rather than lonj; niiri)in>jzidn and Sriitiitijzidn, does not occur lure in any sitecics. 'I'he abdomen of the male has four scfrtnonts, the first of which, like the lirst scirmeiit of the fiinalc al>doinen, is formed of two coalescent seirments ; the diniiiintive fifth scij:nieiit of the male ai)domeii forms the small, more or less imlieddetj hypopy- giuiii; the sometimes more liliforin, in other instances tape-like, rolled up penis is of an extraordinary leiiu:th. The altdonicn of the female consists of five sec^nients; tin' sixth, seventh, and eiuhtli sc converted into a flat- tened, extensile ovipositor, the lirst joint of which surpasses the tw'o following ill hreadlh very nincli, and is oj'ien colored like the rest of the alaloineii ; tin; slender last joint of the ovipositor ends in a Hiinple point. 'riio winjrs show the complete venation of the Diplcrn (iciih/j)- fera; the auxiliary vein is entirely sep:iratctinies rather nppro\iiu;iicl to it; it ends at a more or less acnie an;f|e in tie ('osinl vein, without hecominjj less distinct at its end; the first lonsritudinal vein is provided with lirislles, at least al its . pd'cilojtcrn {/ulminatis M.), co)UH\in, vihuniK, and ni/ufjeiiCHin did not siiow dilVeronees, which re(|iiire a special mention. 0. j^a'ciUiptvra and voinicra dilVer from the


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Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects