yo DESCRIPTION OF PLATES. 



PLATE XIII. 

 Adalia bi^unctata (Family Coccinellidce). 



FIG. 193. Equatorial plate of spermatogonium, 20 chromosomes 19 large, i 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 Cicindelidce) . 



198. Equatorial plate of spermatogonium, 20 chromosomes 19 large, i 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 (/ 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. 



Chlcenius cestivus (Family Car abided). 



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 diver- 



ging univalent chromosomes. 



Chlcenius pennsylvanicus. 



213. First spermatocyte, spireme stage. 



214. First spermatocyte, equatorial plate, x the unequal bivalent. 



215. First spermatocyte, late prophase. 



Galerita bicolor (Family Car abided). 



216. Equatorial plate of spermatogonium, 30 chromosomes 29 large, i small. 



Anomoglossus emarginatus (Family Carabidce). 



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 Elateridce, 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, x\ and x z 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. 



Ellychniacorrusca (Family Lampyridce). 



236. Equatorial plate of spermatogonium, 19 chromosomes. 



