242 
“ Haller s Organ ” in Ticks 
REFERENCES. 
Batelli, A. (1891). Note anatomo-fisiologicke sugli Ixodini. Communicazione 
Preventiva, second part. Monitore Zoologico Italiano, n. 
Dahl, F. (1885). Das Gehor- und Geruchsorgan der Spinnen. Archiv f. mikros/c. 
Anat. xxiv. pp. 1—10. PI. 1 A. 
Donitz, W. (1907). Die wirtschaftlich wichtigen Zecken mit besonderer Beriicksich- 
tigung Afrikas. Leipzig, pp. 4, 5. 
Haller, G. (1881). Vorlaufige Bermerkungen iiber das Gehororgan der Ixodiden. 
Zool. Anzeiger, iv. 165, 166. 
Hooker, W. A. (1908). Life History, Habits and Methods of Study of the Ixodoidea. 
Journ. of Economic Entomol. I. 38. 
IIonter, W. D. and Hooker, W. A. (1907). Information concerning the North 
American Fever Tick. U. S. Dept. Agric., Bur. Entomol., Bull. 72, p. 23. 
Lahille, F. (1905). Contribution a l’etude des Ixodides de la Republique 
Argentine. Anales del Minist. de Agric., Seccion de Zootecnia etc. ii. 107—109. 
(Buenos Aires.) 
Lewis, R. T. (1892). Note on the oviposition of the Cattle-tick. Journ. R. Microsc. 
Soc. 1892, p. 454. 
Martin, J. (1895). Sur une nouvelle espcee d’Ixodidae du Congo, Amblyomma 
quantini. Ann. d. Sci. Eat. xviii. 267—278, pi. XIV. 
Wheler, E. G. (1899). Ticks and Louping-ill. Science Gossip, v. 6. 
- (1900). Louping-ill and the Grass-tick. Journ. R. Agric. Soc., Ser. 3, x. p. 10 
of reprint. 
DESCRIPTION OF PLATE XVIII. 
Fig. 1. Haemaphysalis punctata. Lateral view of left tarsus of female, x 410. (L.E.R.) 
The figure is slightly schematised and represents the vesicle of Haller’s organ and the 
accessory pit in optical section. 
Fig. 2. //aemaphy sails punctata. ? . Photomicrograph of Haller’s organ from the side, 
showing the pore, accessory pit and part of the chitinous fold which differentiates the 
smaller chamber from the larger, x 150. 
Fig. 3. As in Fig. 2. This photograph gives some slight indication of the slit-like 
character of the pore, x 400. 
