Ergotoxine hitherto described as amorphous has been obtained from benzene in 6-sided prisms containing 21% of benzene, [image][long dash]179[degree] and [image][long dash]156[degree] (c = l in chloroform). It can also be crystallized from the homologues of benzene and from CS2. The solvent free substance has [image][long dash]226[degree] and [image]-197[degree] (c = l in chloroform); m!p. indefinite 190-200o, (softens at 180[degree]) corr. when placed in bath at 170[degree]. Ergotinine crystallizes in needles [image]+513[degree]; [image] +435[degree] (c = l in chloroform). m.p. 239[degree] (corr. dec.) bath at 200[degree]. Ergotamine crystallizes in long rectangular plates, has [image]-181[degree] and [image] -159[degree] (c = 1 in chloroform). m.p. 213-214[degree] (corr. dec.) bath at 205[degree]. Ergotamine crystallizes in 3- or 5-sided plates [image] +450[degree] and [image]+385[degree] (c = 0.5 in chloroform). m.p. 252[degree] (corr. dec.) bath at 240[degree]. A large number of commercial specimens of the official ergot of rye obtained from all the principal sources of supply have been examined and found to yield ergotoxine and ergotinine and these alkaloids only, whether worked up by the process of Kraft (Arch. Pharm., 1906, 244, 336) or Stoll (D.R.P. 257, 272). Ergotamine and ergotaminine do not appear to be constituents of the official ergot but can be prepared from an unofficial ergot growing on tall fescue (Festuca) either by Kraft''s process or Stoll''s process.