. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. pir i I 1'' ? L '"'Jl '*'!i 1 â¢'â ; I :*'/;i ⢠,*â¢'. I 111, ' , ,*, â â 'â¢.;â ⢠''. "1. ⢠.â¢â¢(;â¢. I I'M-;'! * â â M) I .'.â â¢v â¢I J i''' 'â , ' i ' V IV.: i.:!vi.:i , . .(!â iil-,;':j "ti 228 NUUTII AMEUICAN TKVI'KTINA. Lrisfly, on the under side with BoiiK-what hjiifrf-r i)ile and iiiun'tjvcr from llio basis tu u little hi-youd tlic iiiiddlf, \vii!i a rather sj)urse row of long, brLslle like hairs; liiiid lilijaj ciliated with rather weak bristleta. Tejjfulto alui
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. pir i I 1'' ? L '"'Jl '*'!i 1 â¢'â ; I :*'/;i ⢠,*â¢'. I 111, ' , ,*, â â 'â¢.;â ⢠''. "1. ⢠.â¢â¢(;â¢. I I'M-;'! * â â M) I .'.â â¢v â¢I J i''' 'â , ' i ' V IV.: i.:!vi.:i , . .(!â iil-,;':j "ti 228 NUUTII AMEUICAN TKVI'KTINA. Lrisfly, on the under side with BoiiK-what hjiifrf-r i)ile and iiiun'tjvcr from llio basis tu u little hi-youd tlic iiiiddlf, \vii!i a rather sj)urse row of long, brLslle like hairs; liiiid lilijaj ciliated with rather weak bristleta. Tejjfulto aluiost as miicli developed as in Wings large, and, eoniparalively to their length, less broad than in IkxavJiuta; the venation, with the exce|ttion of the dilference in the course of the fourth vein, already adverted to, is very like that of Jlcjai/mla, only all the cells, and esi)ecially the stigma, are longer in coniparisuii to their hreadth ; the jjosterior angle of the anal cell is drawn out in an ecjually long and pointed lobe ; the whole of the first longitudinal vein and the third some distance beyond the small crossvein, are bristly. The very characteristic picture of the wings in Acrotoxa is sulFicieiitly rendered by the figures 5 and 6 of Tiil). X, and 19-27 of Tab. XI. The portions of this picture wliicli could not well be called bands {fasc'a), or stripes {nltn), I have called rivulels (following in this Meigen's example, ulio called them rivuli in latin, and Jliivhe in german). The same term may be applied to the species of Acidia. The species (if Acrotoxa are often very much alike, and very dillieult to dis- tinguish in the male sex ; the females are fretiuently easier to distinguish on account of the very dillerent length of the oviposi- tor in dilferent species. Observation 3.âIn view of the difficulty of this group and of the probable occurrence of species belonging to it in some por- tions of the North American conti
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects
