276 Annals Entomological Society of America [Vol. IX, 



could be expected. The site of the cartlp is at present under the 

 waters of MiraFlores Lake. The observations reported were 

 made in the year 1912. I am indebted to Messrs. Shropshire 

 .and Chiddester for aiding me considerably at this station. 



There were only five possible sources for extensive A nopheles 

 breeding, and regular (almost daily) inspections were made of 

 the entire territory to locate Anopheles breeding. The only 

 Anopheles found to be predominant in the mosquitos caught in 

 the camp was A. albimanus Wiede., and excepting during the 

 dry season (Jan. to Apr.), when A. pseudopimctipennis Theob. 



^NIRAFLORES C.2 CA^^P 



1912 



O ^V 



TO RIO GRANDE BREEDING 



.«. ^ %-'^, 



DIR or PREVAILING WINDS — 

 VVivic/i seccYtc/ in >>^oor&arxce _- 



Figure 1 



■appeared in sparce numbers, was practically the only Anophelene 

 represented in these catches. During the first six months of 

 1912, only one A. apicimacula D & K, one A. argyritarsis 

 Rob-Desv. and two A. malefactor D & K were caught. The 

 •only extensive breeding of A . albimanus occurred in the winding 

 Rio Grande, south-west of MiraFlores camp. The five possible 

 breeding centers were: 1, Rio Grande; 2, Rio Cardinas; 

 3, Rio Cameron; 4, Cocoli water reservoir, and 5, the ditch in 

 the Canal Prism. During the dry season the Cameron river 

 was an unusually favorable habitat for A. pseiidopunctipennis 

 and Uranotcenia geometrica Theob., but no influx of these 

 species was ever noted in MiraFlores. By means of liberating 



