34(33) Spores 28-34 × 9-12µm. _Trichodelitschia aedelphica_ - Spores smaller. 35 35(34) Spores 20-27.5 × 8-11µm. _Trichodelitschia bisporula_ (figs 22, 23) - Spores 18-21 × 6-7µm. _Trichodelitschia munkii_ 36(33) Asci ca 256-spored. Spores 14-15 × 6-8µm. _Delitschia myriaspora_ - Asci 8-spored. 37 37(36) Spores less than 20µm long. 38 - Spores more than 20µm long. 41 38(37) Spores 8-11 × 3-5µm. _Delitschia perpusilla_ - Spores 10-20µm long. 39 39(38) Spores 10-14 × 5-6µm. _Delitschia marchalii_ - Spores longer. 40 40(39) Spores 14-18 × 6-10µm, uniseriate. Asci 70-90 × 7-16µm. _Delitschia niesslii_ - Spores (16)18-20(22.5) × 6-7.5µm, biseriate. Asci 80-145 × 20-25µm. _Delitschia consociata_ (fig. 26) 41(37) Spores mostly wider than 20µm. 42 - Spores mostly less than 20µm wide. 43 42(41) Spores 50-64 × 19-23µm. _Delitschia furfuracea_ - Spores 50-70 × 25-33µm. _Delitschia winteri_ (fig. 26) 43(41) Spores 20-25 × 4.5-6µm, the cells slightly tapered and almost completely separated. Pseudothecia hairless, globose, ca 200µm diam. _Delitschia leptospora_ (fig. 26) - Spores longer and wider. 44 44(43) Spores transversely septate. 45 - Spores obliquely septate, deeply constricted at the septum, 35-50 × 15-18µm. _Delitschia didyma_ 45(44) Pseudothecia hairy. Spores 37-50 × 17-20µm, not deeply constricted at the septum. _Delitschia chaetomioides_ - Pseudothecia smooth. 46 46(45) Spores biseriate, 45-55 × 13-16µm, one cell usually larger than the other, deeply constricted at the septum and readily separating. _Delitschia canina_ - Spores uniseriate, 40-55 × 16-21µm, both cells equal. _Delitschia patagonica_ [Illustration: FIG. 22. _Trichodelitschia bisporula_, pseudothecium.] [Illustration: FIG. 23. _T. bisporula_, expanded ascus broken through the outer wall, with spores.] [Illustration: FIG. 24. _Apiosordaria verruculosa_, ascospores.] [Illustration: FIG. 25. _Zygospermella insignis_, ascus and ascospore.]