Subject Index. — Aetiology. 
151 Inseda. 
Teratology. 
Missbildungen ; Rudow, 3. 
Leg on vertex, Carineta ; Schrottky, 
7. 
Emaburga atomaria supernumerary 
Avings; Pickett, (190), Ent. Rec., 1900. 
6 Fliigel, Gelechia ; abnorm. Geader, 
Bombus ; Tarnani. 
Supernumerary tarsus, Ccitocala : 
Bacot, (cii), London, Pioc. out. soe., 
1900. 
Two ovipositors, Locusta viridissima ; 
Berlese, 3. 
Antenne teratologique, Scybalieus ; 
de la Porte, Paris, Bull. Soc. ent., France, 
1906, (186). 
Hybrids. 
Hybrid Saturniidae ; Soule. 
Thaumas vespertilio x Ilyles euphor- 
biae ; Muschamp. 
Hybrid Notodonta ziczac-dromedarius ; 
Pierce. 
Chaerocampa liybr. pernoldi Jcs. ; 
Jacobs, II. 
Silkworms, hybrids of; Toyama, 4. 
Hybrid Nyssia ; Burrows, (132), Ent. 
Rec., 1906. 
Hybrid pupae , S. ocellata x populi ; 
Bacot, (22), Ent. Rec., 1906. 
Crosses. 
Hybridisation and mongrelisation, 
Lepidoptera ; Tutt, 4. 
Breeding experiments, Raploa ; Foster. 
Breeding Lep. from type and var. ; 
Doncaster and Raynor. 
Kreuzungsversuche zAvischen Abend- 
pfauenauge und Pappelsch warmer ; 
Wolter. 
Experiments, crossing, etc.; Stand- 
fuss, 2. 
Rearing Deilephila cuphorbiae 
rufe8ccn8; Gatnar, 2. 
Pairing varr., JJemerophila abrup- 
laria ; Kaye, (80,81), London, Proc. S. 
London Nat. Hist. Soc., 1906-7. 
Breeding from var. aeacus of Zygaena 
epliialtes ; Piezczek, (12-14), Wien, 
Verh. Zool. bot. Ges., 1906. 
Between forms of Xanthorhoe fer- 
rugata \ Prout, 3. 
Breeding races, Lcptinotarsa ; Tower, 
3. 
Mendel’s laAv applied to silkworm 
crosses ; Toyama, 1. 
Silkworm crosses, Mendel’s law, 
Toyama, 3. 
Tnbreeding, cross-breeding and selec- 
tion, fertility and variability, Drosophila ; 
Castle and Castle and others. 
Hybridising Lep. ; Head, (47), Ent. 
Rec., 1906. 
Psilotrix protensus $ accoppiato coil 
nobilw ? ; Coniglio Fanales. 
Heredity. 
Inheritance of dichromatism, Coleo- 
ptera ; McCracken, 1. 
Chromosomes and heredity, Hemi- 
ptera : Wilson, 2. 
Heredity of variation Trichogramma \ 
Girault, 1. 
Verbesserung der Bienenrasso (Russ.) ; 
Butkeiric. 
Evolution. 
A study of the wings of the Tenthre- 
dinoidea ; MacGillivray, 1. 
Flugellose Arthropoden des Bernsteins 
in ihrer Beziehung zur Descendenz- 
theorie : Olfers. 
Origin of Avings, and phylogeny ; 
Osborn, 4. 
Origin of the wings ; Osborn, 5. 
Geological history of cockroaches ; 
Sellards, 1. 
Production and preservation of. new 
characters, races and species ; Tower, 2. 
Evolution in chrysomelid beetles, 
Lcptinotarsa ; Tower, 3. 
Artenbildung bei Ameisengiisten und 
Termitengasten ; Wasmann, 3. 
