Memoirs of the National Academy of Sciences . Fig. 51.—Venation of Hepiadiscal vein ; j. .iiluum. Ixismtustelinus; rf, auterior; (/.posterior 86 MEMOIES OF THE XATIONAL ACADEMY OF SCIEJSXES. It may be remarked that Spuler agrees witli Braiier and Redtenbacher, as well as Haase, thatAdolphs system of convex and coucave veins Is entirely erroneous. We adopt, then, Spnlers system of venation, and earnestly trust that it may be generallyaccepted as simple, intellioible, and applicable to all orders of insects, based as it is onontogenetic, as well as anatomical, grounds. The following system appli
Memoirs of the National Academy of Sciences . Fig. 51.—Venation of Hepiadiscal vein ; j. .iiluum. Ixismtustelinus; rf, auterior; (/.posterior 86 MEMOIES OF THE XATIONAL ACADEMY OF SCIEJSXES. It may be remarked that Spuler agrees witli Braiier and Redtenbacher, as well as Haase, thatAdolphs system of convex and coucave veins Is entirely erroneous. We adopt, then, Spnlers system of venation, and earnestly trust that it may be generallyaccepted as simple, intellioible, and applicable to all orders of insects, based as it is onontogenetic, as well as anatomical, grounds. The following system applies to the Le])idoptera as well as all other orders. Fig. 52represents the venation of a Notodontian {Heterocampa ohliqua). We merely deviate, frommotives of convenience and for the sake of uniformity, from Spulers numeration of the two analveins, by numbering them VI and ^II, instead of designating them by the Greek letters a Fig. !.—Venation of Heterocampa : the names of the veins as designated below^ d,anterior: d\ posterior diseal vein : /. freunlnni: sc. subcostal cell. The following table will show the numbers and names of the five veins of the outspreadportion of the wing and two (rarely three) of the fan like or inner i)ortion. Instead of denotingthe veins by the noun and adjective as, for exa!ui)le, the median vein, we may, with Comstock,call it in descriptions or diagnoses, media, or refer to it as Vein III. I. Costa. V. First anal (submedian). II. Subcosta (radius). VI. Second anal (internal). III. Media. VII. Third anal. IV. Cubitus (median vein of some authors). rAKIIAL BIBLIOGRAPHY. Mailer, Erit:. lieitriige zur Keniitnlss tier Termiten. .Jenaiscli. Zeitschr. f. Naturw., 1875. Braiier, F. Ansicbteii iiber die palaozoisclien lusekten uiid dereu Deiituug. Aunal K. K. uatnrh. , i, pp. 86-126. 2 PL 1886. Bedhnbacher, Joseph. VerglcicUeude i^tudieii iiber das Fliigelgeader de
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