196. First spermatocyte, equatorial plate.
197. Second spermatocyte, equatorial plates.
Cicindela primeriana (Family Cicindelidæ).
198. Equatorial plate of spermatogonium, 20 chromosomes—19 large, 1 small.
199. First spermatocyte, spireme stage, x the heterochromosome group.
200. First spermatocyte, prophase.
201. First spermatocyte, metaphase, x the unequal pair in tripartite form.
202. First spermatocyte, showing metakinesis of the heterochromosomes (l and s).
203. First spermatocyte, equatorial plate.
204. Second spermatocyte, equatorial plates.