M2 Insccla, 
XI. Insecta. 
[1922] 
Tropisms. 
Cartwright, Hessian fly, 451 ; 
Crumb, 630 ; Cuscianna, 648 ; Mc- 
Colloch, Chemotropism in Chloridea 
obsoleta, 1775 ; Riley, Gerris remigis, 
2372 ; Roubaud and Veillon*, 2420. 
Instinct. 
Bierens de HaaN, 262 ; Deegener, 
694 ; Descy, 719 ; Gotz, 1131. 
Habitat. 
Bettinger, cavemicolous insects, 
245; Dudich, cavernicolous, 774; 
JeaNNel, cavemicolous, 1412 ; Hen- 
riksen, aquatic Hymenoptera , 1261 ; 
Lamborn, A nopheles , 1645 ; Met- 
savainio, occurrence of water-beetles 
in various types of water, 1917 ; Pillai, 
fauna of forest floors, 2261 ; Severin 
and Basinger, Eutettix tenella, 2552 ; 
Vorbrodt, Lepidoptera of the snow 
line, 2916 ; Zariguiey, cavemicolous^ 
Coleoptera, Butl. Inst. Catal. N. H. 
Barcelona p. 94 20 1920. 
Flight. 
Bryk, pairs in cop., 401 ; Cuenot & 
Mercier, 636 ; Keith, 1497 ; Prell, 
2308. 
Migration. 
Andrewes, 65 ; Corkins, 592 ; 
Dobrzhanski, Coccinellidae, 734 ; 
Gable and Baker, 1042; Lichten- 
stein* and Grasse, 1713 ; Moffat, 
1952 ; Parsiiley, Gerridae, etc., 
2164; Pospelov, 2288; Poulton, 
2293, 2294; Riley, 2369; Severin 
and Basinger, Eutettix tenella, 2551 ; 
TrautmanN, 2825 
Gregariousness. 
Deegener, Hyponomeuta, 694 ; 
Dobrzhanski, Coccinellidae, 734. 
Symbiosis. 
Buchner, in Hemiptera, 409 ; 
FraeNkel, 986. 
i 
Social Habits. 
Lameere, 1649; Sciirottky, 2499; 
ToNNOir, a Chironomid and a Blepharo- 
cerid larva, 2800. 
Nests. 
Balles, Pompilus fumipennis, 118 ; 
Bequaert, Polybioides , 208 ; Berland, 
Polistes gallicus, 229; Davis, Vespidae, 
673; Jungel, ants, 1477; Lefri, 
Odynerus , 1693 ; Lomnicki, ant, 1735 ; 
Malyshev, bees and wasps, 1832 ; 
Pierre, Odynerus, 2260 ; Platii, Bom- 
bus, 2265 ; Sturmiiofel, Perophoridae, 
2712 ; Turner, Odynerus, 2839. 
Ant-life. Myrmecophily. 
Bouvier, 336 ; Bugnion*, 416 ; 
Donistiiorpe, 748 ; Farquh arson, 
African Lycaenidae, p. 337, Cecidomyii- 
dae, p. 439, 918 ; Forel, 980 ; Harder, 
1194; Krausse, 1592, 1593, 1594; 
Mann, 1835 ; Stumper, Psychology, 
2711. 
Wasp-life. 
Balfour-Browne, 379. 
Bee-life. 
Balfour-Browne, 379; Butter- 
field, P[orritt], Welch, p. 399 
Naturalist 1922; Henriksen, 1258; 
Jorgensen, 1474. 
Termitophily. 
Batiiellier, 164; Bryk, 397; 
Silvestri, 2576 ; Thompson, 2769. 
Parasitism. 
Crawley and Baylis, 618 ; Den 
Doop, 700a; FahriNger, 894; Ford, 
979; Haviland, 1216; Picard, 2251 ; 
Russell, 2433; Thompson, 2771, 
2772 ; Vaulx, 2891 ; West, 3028. 
Luminosity. 
Aue, 80; Gerretsen, 1078; Hess, 
1280; Marciiand, 1839; Vogel, 
2915. 
Sound Production. 
Big lake, Locustidae, 283 ; Dudicii 
773; Haupt, Cicadidae, 1210; He 
bard, Heliocheilus paradoxus, 1228 
Henry, Pulchriphyllium crurifolium 
1263; Jordan, 1472; Keler, 1498 
Kinthau, 1613 ; Lienhart, 1718 
Williams, 3948. 
