BLOOD FEEDING HABITS OF ANOPHELINES 447 



had fed on human blood. We conclude, therefore, that the 

 hospital was used chiefly as a shelter by the anopheline mos- 

 quitoes found therein. 



SUMMARY AND CONCLUSIONS 



Examination of ingested blood by the precipitin reaction has 

 shown that Anopheles pseudopunctipennis captured in the 

 houses of two localities in the Province of Tucumán, Argentina, 

 had fed on various hosts in the following proportions : man, 

 50 per cent; dog, 21.8 per cent; horse, 8.9 per cent; sheep or 

 goat, 6.2 per cent; cow, 5.5 per cent; chicken, 3.2 per cent; hog, 

 2.5 per cent; cat 1.8 per cent. Man and dog being essentially 

 house-dwellers at night, the results demónstrate a very high 

 domesticity for the insect. 



Ever since the work of Paterson (4) in 1911, it has been recog- 

 nized that A. pseudopunctipennis is the most dangerous malaria 

 transmitter in Northern Argentina. Our work furnishes addi- 

 tional evidence against this species. 



REFERENCES 



(1) BuLL, Carroll G., and King, W. V.: Amer. Jour. Hyg., 1923, iii, 491. 



(2) King, W. V., and Bull, Carroll G. : Amer. Jour. Hyg., 1923, iii, 497. 



(3) Mühlens, P., Dios, R. L., Petrocchi, Juana, t Zuccarini, J. A.: Revista 



Inst. Bact. del Dpto. Nacional de Higiene (Buenos Aires), 1925, iv, 251. 



(4) Paterson, Guillermo C. : Anales del Dpto. Nacional de Higiene, (Buenos 



Aires), 1911, xviii, 31. 



