1050 A. AESCHLIMANN, P. A. DIEHL, G. EICHENBERGER, R. IMMLER ET N. WEISS 



SUMMARY 



Ticks from domestic animais in the Tessin (cattle, sheep and goat) have been 

 studied in the course of four expéditions in 1966 and 1967. Five species were 

 collected, two of which are new for Switzerland. 



/. ricinus is the most fréquent and widespread species, because it shows a 

 wide ecological tolérance and accepts a variety of hosts. It is especially found in 

 underwood and on bushes. Cultivated land limits its extension. In altitude it 

 disappears with the last shrubs. 



D. marginatus is less widespread than /. ricinus yet it seems to be distributed 

 throughout the canton. It is found at lower altitude in the mountain and is less 

 fréquent in shady and damp valleys. In stony areas it prefers bramble, shrubs 

 and long grass. 



The occurrence of H. punctata has now been confirmed. This species lives 

 in similar habitats as D. marginatus. However, it is absent from distant valleys. 

 For survival it needs some more warmth than D. marginatus. Consequently the 

 distribution of the two species does not necessarily coincide. 



The mediterranean species of H. sulcata is reported for the first time from 

 Switzerland. Its distribution is localised in warm, dry zones. It lives in sunny 

 and stony areas. 



Another mediterranean species, R. bursa, was discovered for the first time in 

 Switzerland. Like H. sulcata this tick occurs in the Tessin at its northernmost 

 distribution limit yet known. Its ecological needs are such that it can only survive 

 in restricted niches. 



BIBLIOGRAPHIE 



Aeschlimann, A. et W. Buttiker. 1969. Les tiques (Ixodoidea) sont-elles des vecteurs 

 de maladies en Suisse ? Bull. Soc. Ent. suisse. (Sous presse). 



Aeschlimann, A. et al. 1965. A propos des tiques de Suisse (Arachnoidea, Acarina, 

 Ixodoidea). Rev. suisse Zool. 72: 577-583. 



Bouvier, G. 1956. Ektoparasiten schweizerischer Wildsâugetiere. Jena, G. Fischer, 

 18 pp. (Parasitologische Schriftenreihe, Heft 4). 



Morel, P. C. Les tiques de l'Afrique et du bassin méditerranéen. (Manuscrit en communi- 

 cation.) 



