JO DESCRIPTION OF PLATES. 



Plate XIII. 

 Adalia bipunctata {Family Coccineilidce). 



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 frimeriana {Family Cicindelidce). 



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 {I 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 Carabidce). 



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. 



2X1. 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 abides). 



216. Equatorial plate of spermatogonium, 30 chromosomes — 29 large, 1 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, * 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 2 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. 



