149 Insecta. 
Subject Index. — Aetiology. 
VARIATION AND AETIOLOGY. 
General. 
The effects of inbreeding and selec- 
tion on the fertility, vigor and sex 
ratio, Drosophila ; Moenkhaus, 1622. 
The relation between chromosome- 
number and species in Notonecta ; 
Browne, 279. 
Dimorphism, spermatozoa ; O’Dono- 
hoe, 1758. 
Variation. 
Variation, value of projected effi- 
ciency ; Sweeting, 2488. 
Haufiges Auftreten verschiedener 
Schmetterlings-Arten und die Sonnen- 
fleckenperioden ; Dieroff, 579. 
Influence of climate in producing 
aberrations; Franck, 776. 
Variations biologiques et morpholo- 
giques d’origine geographique, Sfo- 
moxys calcitrans en Afrique tropicale; 
Roubaud, 2104. 
Seasonal dimorphism ; Merrifield, 
1566. 
A tendency towards posterior ery- 
thrization in the Psammocharidae ; 
Banks, 94. 
Ergebnisse aus Zuchtexperimenten, 
traduction; Standfuss, 2367. 
Exporimente an liber win ternden 
Lepidoptera-Puppen ; Reiff, 1997. 
Tomporaturoxperimente ; Glaser, 
895. 
Experimental varr. V. to; Reuss, 
2020. 
Vanessa urticae, temperature varia- 
tion ; Reuss, 2019. 
Variation in size, temperature experi- 
ments; Merrifield, 1567. 
Diahrotica soror, color pattern; 
variation ; Kellogg, 1216. 
Haufigkeit der Aberrationen von 
Chrysomela varians ; Meissner, 1551. 
Phytodecta ( Spartophila ) variabilis ; 
Reineck, 1999. 
Variable maculation in Goccinellidae ; 
Leng, 1385. 
Variable Chilean Col. ; Germain, 
845. 
Wasps, variability in a single nest ; 
Pearson, 1813. 
Das Variioren der Hummeln; Vogt, 
2652. 
Variation speoifique des Lepidopteres; 
Houlbert, 1114. 
Variations de V Aglia tau ; Oberthiir, 
1744. 
Variationsstufen von Pier is napi ; 
Stichel, 2379. 
Vitale Farbung der Mikrolepido- 
pterenraupen ; Sitowski, 2320. 
Nature of molaiiism; Stewart, 2377. 
— Sich p. 318 Ent. 44. — Melanism, 
Amphidasys ; Leigh, 1380. — Melanis- 
mus im oberschlesischen lndustriebe- 
zirk; Raebel, 1969. — Melanismus, 
Schmetterlingen ; Dieroff, 578. — Cy- 
matophora or, melanic var. ; Hasebroek, 
1011 . 
Deficient pigment, Noctua ; Wavrier 
p. 363 Ent. 44. 
Colour dimorphism, pupa of Leiopti - 
Iua; Chapman p. 243 Ent. Rec. 23. 
Double mutants, silkworm ; Spill- 
man, 2364. 
Anpassung der Polycteniden (Un- 
gar.); Horv&th, 1111. 
A variant, periodical cicada ; Gortner, 
904. 
Eutermes; Holmgren, 1093. 
V ari ationserscheinungon, Flu gel- 
geiider von Leptis vitripennis ; Kleine, 
1274. 
Origin of wing mutations, Droso- 
phila ; Morgan, 1634. — Origin of muta- 
tions, eye color Drosophila, and in- 
heritance; Morgan, 1635. 
Teratology. 
Forstchritte auf dem Gobiete der 
Insektenteratologie (1906-1908), Sam- 
melreferat; Pax Zs. wiss. Insektebniol. 
7 pp. 396-399. 
Monstrositaten; Frings, 795. 
Missbildungen, Kaforn ; Rudo w, 2177. 
Toratologia Coleottcri ; Bcffa, 129. 
Neuo Monstrositaten Coleopteren ; 
Krizenecky, 1313. 
Coleotteri anomali ; Chinaglia, 402, 
403 & 404. 
Antenna, teratology, Diptera ; Lamb, 
1348. 
