984 MOSQUITOES OF NORTH AMERICA 



Bishopp) ; Bluefields, Nicaragua ( ) ; Puerto Barrios, Guatemala, August 



18, 1903 (W. L. Stone) ; San Jose, Guatemala, May 6, 1905 (F, Knab) ; Port 

 Limon, Costa Kica, September 27, 1905 (F. Knab) ; Bocas del Toro, Panama, 

 September 28, 1903 (P. Osterhout) ; Tabernilla, Canal Zone, Panama, April 

 26, 1907 (A. Busck) ; La Boca, Canal Zone, Panama (A. Busck) ; Gatun, Canal 

 Zone, Panama (A. ]3usck) ; Taboga Island, Panama Bay, Panama (A. Busck) ; 

 Italian Camp, Ancon, Canal Zone, Panama, November 22, 1907 (A. H. Jen- 

 nings) ; Pedro Miguel, Canal Zone, Panama, December 7, 1907 (A. H, Jen- 

 nings) ; Miraflores, Canal Zone, Panama, December 10, 1907 (A. H. Jennings) ; 

 Road to Comacho dam, Canal Zone, Panama, December 20, 1907 (A. H. Jen- 

 nings) ; Caldera Island, Porto Bello Bay, Panama, January 4, 1908 (A. H. 

 Jennings) ; Las Cascadas, Canal Zone, Panama, February 5, 1908 (A. H. 

 Jennings) ; East Corozal, Canal Zone, Panama, June 27, 1908 (A. H. Jen- 

 nings) ; San Pablo, Canal Zone, Panama (A. H. Jennings) ; near Panama City, 

 Panama, December 6, 1907 (A. H. Jennings) ; Guayaquil, Ecuador (F. 

 Campos) ; Kingston, Jamaica (M. Grabham) ; San Francisco Mountains, Santo 

 Domingo, April, 1905 (A. Busck) ; Porto Rico, December, 1913 (W. R. Whip- 

 pitt) ; Havana, Cuba (J. R. Taylor), October, 1900 (J. Carroll) ; San Antonio 

 de los Banos, Cuba (J. H. Pazos) ; Key West, Florida (C. H. Gardner). 



The species Anopheles alhimanus was established by Wiedemann in 1821. 

 It was redescribed by Agramonte under the tentative name cubensis in 1900, 

 and by Theobald in 1901 under the name albipes as a variety of argyritarsis. 

 Blanchard cites in the synonymy of this species " Anopheles duhius Theobald, 

 1901." We have been unable to trace this name in the writings of Theobald and 

 are therefore obliged to credit it to Blanchard. 



The species agrees closely in most of its characteristics with Anopheles argyri- 

 tarsis, the most marked difference being the presence of a black ring on the last 

 joint of the hind tarsi in alhimanus. The wing pattern is practically identical 

 in the two species, but in argyritarsis the light colored scales are usually pure 

 white while in alhimanus they are distinctly ochreous yellow. The three velvet- 

 black spots on the mesonotum are very distinct in alhimanus, while usually they 

 are not particularly obvious in argyritarsis. Unless these differences are kept in 

 mind specimens of alhimanus with the hind tarsi broken are likely to be mistaken 

 for argyritarsis. 



As in Anopheles tarsimaculata and A. argyritarsis, the wing pattern is vari- 

 able in the relative extent of the dark and light scales, particularly on the costa. 

 In the male the black spots on the costa are less extensive and the large spot 

 nearest the wing-base is divided near its distal end; females occur which vary 

 more or less in the same direction. In lots received in 1912 from the Gatun 

 region of the Panama Canal Zone, during the time of the great flight already 

 mentioned, some of the females show a variation in the coloration of the palpi 

 in the direction of tarsimaculata. These specimens have the penultimate joint 

 of the palpi more or less yellowish scaled with a black ring at the base, the long 

 joint with a white apical ring, as in tarsimaculata. As some typical tarsimacvr 

 lata were taken in the same lot it is possible that the two forms were interbreed- 

 ing as a result of inordinate multiplication due to the conditions then existing ; 

 at all events we have not seen such intermediate specimens from other localities, 

 even where the two forms occur together. The distribution of Anopheles alhi- 

 manus has been discussed in connection with tarsimaculata. As far as our 

 present information goes the species extends from Mexico to Panama on the 

 mainland and only extends into South America on the Pacific coast; in the West 

 Indies it is restricted to the Greater Antilles. Theobald, in his original descrip- 

 tion of albipes, includes specimens from South American localities, he evidently 

 having overlooked the difference in the ornamentation of the palpi. He even 

 mentions India as a locality, but this is clearly a misidentification originating 

 with Giles. 



