INDEX. 



A. 

 Abbott, 211, 216, 218. 

 Abedus, 142. 

 Aldrovandi, 13, 158, 190. 

 Alexander, 50. 



Algse, 24, 101, 137, 242, 244, 248. 

 Alisma, 160. 

 Amoeba, 247. 

 Ambrysus, 198. 



Ambrysus californicvs, 199, 204. 

 Ambrysus circumcinctus, 199, 201. 

 Ambrysus guttatipennis, 200, 208. 

 Ambrysus heidemanni, 199, 205. 

 Ambrysus, Key to species, 198. 

 Ambrysus melanopterus, 199, 203. 

 Ambrysus mormon, 199, 202. 

 Ambrysus puncticollis, 199, 203. 

 Ambrysus pudicus, 199, 204. 

 Amhrysus pulchettus, 198, 200. 

 Ambrysus pulchellus var. pallidulus, 



198, 200. 

 Ambrysus signoreti, 200, 202. 

 Amyot & Serville, 15. 

 Ankistrodesmus, 246. 

 Arcella, 247. 



Arctocorixa, 211, 212, 215. 

 Arctorixa alternata, 27, 229. 

 Arrows, 92. 

 Auhauhtli, 37. 

 Axayactl, 37. 



B. 

 Back swimmer, 24, 32. 

 Back swimmers (see Notonectidie) . 

 Barber, 51. 

 Bastin, 38. 

 Batrachidea, 50. 

 Beamer, 106, 208. 

 Belostoma, 30, 144. 

 Belostoma ftumineum, 144. 

 Belostmatidae, 8, 11, 12, 13, 23, 30, 35, 



40, 44, 141. 

 BelostomatidsD, Biology of, 142, 151. 

 Belostomatidae, Key to genera, 141. 

 Benacus, 30, 150. 

 Benacus griseus, 150. 

 Blanchard, 15. 

 Blasturus, 161. 

 Boatmen (see Corixidae). 

 Bog moss, 33. 

 Borner, 211, 238. 



Botryococcus, 246. 



Brimley, 150. 



Britton, 149. 



Brocher, 16, 43, 44, 94, 117, 157, 160. 



180, 236. 

 Buenoa, 30, 32, 35, 41, 42, 173, 177. 

 Buenoa albida, 175, 175. 

 Buenoa carinata, 174. 

 Buenoa elegans, 174, 176. 

 Buenoa, Key to species, 173. 

 Buenoa margaritacea, 33, 174, 175, 194. 

 Buenoa plotycnemis, 174, 176. 

 Bueno, 15, 36, 40, 43, 46, 92, 93, 95, 96, 



116, 117, 118, 135, 137, 139, 144. 145. 



154, 155, 157, 159, 160, 161, 180, 183, 



208, 209. 

 Bugnion and Popoflf, 238. 

 Burmeister, 15. 

 Butler, 101. 



C. 



Callibsetes, 161. 



CallicorLxa, 211, 212. 



Cambarus immunis, 216. 



Capsids, 50. 



Caraphractus cinctus Walker, 32. 



Carmine feeding experiment, 241. 



CattaU 24, 26, 33, 34, 93, 103, 244. 



Ceratophyllum, 208. 



Chalcididae, 32, 101. 



Champion, 46, 51. 



Chara, 177, 184. 



Chiloxanthus, 55, 59. 



Chiloxanthus stellata, 69. 



Chironomus, 248. 



Chlorophyll, 35, 228. 



Chlamydomonas, 247. 



Cicadellids, 34. 



Comstock, 228. 



Conferva, 235. 



Corixa, 211, 212. 



Corixa orivara, 235. 



Corixidae, 8, 11, 23, 24, 26, 31, 32, 34, 35, 



41, 43, 44, 96, 178, 180, 182, 186, 190, 



193, 197, 210. 

 Corixidae, biology of, 215. 

 Corixidae, Key to genera, 211. 

 Corixid eggs, 25. 

 Corixids as food, 37. 

 Cosmarium, 246. 

 Crambus, 101. 



22 — Sci. Bui. — 1669 



(337) 



