Plate XIII.
Adalia bipunctata (Family Coccinellidæ).
Fig. 193. Equatorial plate of spermatogonium, 20 chromosomes—19 large, 1 small.
194. First spermatocyte, spireme stage, x the heterochromosome group.
195. First spermatocyte, metaphase.
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.
205. Giant spermatocyte, spireme stage, heterochromosome group double the usual size.
206. Giant spermatocyte, prophase.
Chlænius æstivus (Family Carabidæ).
207. First spermatocyte, spireme stage, showing the unequal pair associated with a large plasmosome.
208. First spermatocyte, metaphase.
209-210. First spermatocyte, beginning of metakinesis.
211. First spermatocyte, equatorial plate, 17 chromosomes.
212. First spermatocyte, anaphase, showing elongated centrosome and diverging univalent chromosomes.
Chlænius pennsylvanicus.
213. First spermatocyte, spireme stage.
214. First spermatocyte, equatorial plate, x the unequal bivalent.
215. First spermatocyte, late prophase.
Galerita bicolor (Family Carabidæ).
216. Equatorial plate of spermatogonium, 30 chromosomes—29 large, 1 small.
Anomoglossus emarginatus (Family Carabidæ).
217. First spermatocyte, growth stage, x the odd chromosome.
218. First spermatocyte, prophase.
219-220. First spermatocytes, metaphase, x the odd chromosome.
221. First spermatocyte, equatorial plate.
222. First spermatocyte, daughter plates containing 18 and 19 chromosomes, respectively.
223. Second spermatocytes, equatorial plates.
Elater I (Family Elateridæ, species not determined).
224. Equatorial plate of spermatogonium, 19 chromosomes, x the odd one.
225. First spermatocyte, spireme stage, x the odd chromosome.
226. First spermatocyte, metaphase.
227. First spermatocyte, prophase.
228. First spermatocyte, equatorial plate.
229. Equatorial plate from egg follicle, 20 chromosomes, x1 and x2 the pair corresponding to x in the spermatogonium.
Elater II (Species not determined).
230. Equatorial plate of spermatogonium, 19 chromosomes, x the odd one.
231. First spermatocyte, spireme stage.
232. First spermatocyte, prophase.
233. First spermatocyte, beginning of metakinesis.
234. First spermatocyte, equatorial plate, x the odd chromosome.
235. A pair of second spermatocytes in metaphase, two chromosomes connected, x the odd chromosome.
Ellychnia corrusca (Family Lampyridæ).
236. Equatorial plate of spermatogonium, 19 chromosomes.
