. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. I ir 1 ''I ^ \m' 'ii â¢â ;ji 34 DIPTERA OF NOKTII AMERICA. [part IV. vein Ix'tvvpcn its orif?in and the omission of tho tliira lonjjfitudinal vein. Tli(! p'liole of tlic first submarginal cell is tlio portion of tlie second longitudinal vein between tlie tip of the pncfurca and the inner end of tliat cell. In order to deserilje tlic riilativo position of tlie tips of the veins and of cross-veins, I have nsed the term opfxmle,; two points
. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. I ir 1 ''I ^ \m' 'ii â¢â ;ji 34 DIPTERA OF NOKTII AMERICA. [part IV. vein Ix'tvvpcn its orif?in and the omission of tho tliira lonjjfitudinal vein. Tli(! p'liole of tlic first submarginal cell is tlio portion of tlie second longitudinal vein between tlie tip of the pncfurca and the inner end of tliat cell. In order to deserilje tlic riilativo position of tlie tips of the veins and of cross-veins, I have nsed the term opfxmle,; two points arc opposite each other when, i)ro- jected on the longitudinal axis of the wing, they a])pear ecpii- dirttant from its basis. The following diagram explains the other terms, which have been used by me;â xxx: XX k. Diagram of a icing icith two suhmarginal and Jive posterior cells {Cladura indiciaa). 1. Costal. 2. Subcostal. ."!. MarKioal. ;)*. I liner niarglnal. 4. First GabmargiDal.' Cells. H. Socoud suhmarginal. (i-10. First to fifth posturior. 11. Di-scal. 12. First basal. 13. Sccoud basal. 14. Anal. Axillarj'. 16. Spurious. I!r :''⢠Veins. m 6 I. Auxiliary, c TO. First longitudinal. h n o. Second longitudinal. h i. I'ricfurca kn. Anterior branch of the second 1. vein. k o. I' br<'.:)cli of the second 1. vein. i k. Petiole of the first submarginal cell. i p. Third locgitudinal. dqrst. Fourth longitndinal. q r. Fork of its anterior branch ; the posterior branch of this fork, ending in r, is Mr. Loew's an- terior intercalary vein. s t. Fork of the posterior branch of the fourth vein; the branch of this fork, ending in t, is Mr. Loew's posterior inter- ca lary vein. e u. Fifth longitudinal. /v. Sixth longitudinal. g w. Seventh longitudinal. ' In my paper: Description of some new Genera and Species of North American Limnobina, Proc. Phil. Entom. Soc. 1865, p. 225, I have called this cell the second marginal; the proper term, however, in acco
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