455 NELSON C. DA VIS AND RAYMOND C. SHANNON. 



inal batch of adults captured in Ledesma (from which the young were 

 reared), some individuáis remained alive in captivity for more than one 

 month, receiving occasional blood meáis. 



DlSCUSSIOÑ. 



The larvae and male genitalia of A. rondoni will be considered in a 

 sepárate publication. The present indications are that it should be 

 considered a sepárate species and not a variety of tarsimaculatus as 

 given by Christophers (4). 



The type locality in the State of Matto Grosso, Brazil, is very 

 distant from the Argentine foci in the Province of Jujuy. A critical 

 study of material from the two regions might give some basis for postu- 

 lating parallel evolution from tarsimaculatus stock; however, it is 

 much more likely that connecting foci will be discovered in the little- 

 studied regions of Bolivia or Paraguay, or both. 



In this connection, it should be recorded that the species has not 

 been found at Embarcación, north of Ledesma, near the Bolivian fron- 

 tier. Neither has it been discovered in the neighborhood of Asunción, 

 Paraguay, ñor in the northeastern district of Argentina (Corrientes, 

 Misiones, Formosa and Chaco). 



SUMMARY AND CONCLUSIONS. 



1. The height of the A. rondoni breeding season in the Province of 

 Jujuy, Argentina, occurs in late summer. probably in March. 



2. The heaviest flight of this species takes place slightly earlier in 

 the evening than that of A. pseudopwictipennis. 



3. It is not domestic to the same extent as A. pseudopunctipennis, 

 but still is found in houses in appreciable numbers. 



4. Dissections to date have all been negative. We can confidently 

 state that it is not so easily infected with malaria as is A. pseudo- 

 punctipennis. 



5. Eggs of known and isolated females have always produced off- 

 spring marked similarly to the mothers; this is additional evidence 

 that rondoni is a true species and not a variant of tarsimaculatus. 



Bibliography. 



1. Neiva, a. and C. Pinto. "Descrip^ao de urna nova especie. Cellia rondoni 



nov. sp." Brasü-Medico, Anno XXXVI, Vol. II, 18 Nov. de 1922, No. 46. 



2. MüHLENS, Pedro, Roberto L. Dios, Juana Petrocchi y A. Zuccarini. 



"Estudios sobre Paludismo y Hematología en el Norte Argentino." Revista 

 del Inst. Bact. del Dept. Nacional de Higiene, Buenos Aires, Diciembre 1925, 

 Vol. IV, No. 3, p. 251. 



