Reprinted from The American Journal of Hygiene, Vol. VIII, No. 3, 

 448-456, May, 1928. 



THEHABITS OF ANOPHELES RON DON I IN THE 

 ARGENTINE REPUBLIC* 



By NELSON C. da vis and raymond c. shannon. 



(Received for publica ti on February 6, 1928.) 



Introduction. 



In 1922 Neiva and Pinto (1) described a new species of Anopheles 

 from the State of Matto Grosso, Brazil, which diífered from A. tarsi- 

 maculatus principally in that the basal portion of the third hind tarsus 

 was ringed with black, while the corresponding segment in tarsi- 

 maculatus is entirely white. The authors collected three female spe- 

 cimens, but no males or larvae. The new species was called Cellia 

 rondoni. 



In 1924, Petrocchi (2) encountered A. rondoni at Santa Clara, 

 Province of Jujuy, Argentina Republic. Brief mention was made of 

 this species in "Estudios sobre Paludismo y Hematología en el Norte 

 Argentino" (1925) by Mühlens, et al. 



Dr. Paterson of San Pedro de Jujuy tells us that he capturad a 

 specimen several years ago which corresponded in markings to this 

 species, but no pubhshed record was made at the time. 



It is interesting that in their work, "El Paludismo" (p. 215), 

 Penna and Barbieri (3) figure an undoubted rondoni as Cellia albimana 

 Wied. 



Present observations. 



In August, 1925, Davis and Strode encountered A. rondoni breeding 

 near Ledesma, Province of Jujuy. A female was bred from a miscella- 

 neous coUection of larvae. 



Owing to pressure of other work, no further observations were mada 

 until March, 1926, when, accompanied by Dr. Martin M. Lobo, tha 

 writers visited Ledesma and vicinity. At that time A. rondoni was 

 found breeding in various places near the village of Ledesma, perhaps 

 in greatest numbers at a small, outlying settlement known as Cañitas. 



* The studies and observations upon which this report is based were carried 

 out with the support and under the auspices of the International Health División 

 of the Rockefeller Foundation and the National Department of Hygiene of the 

 Argentine Republic. 



448 



