950 MOSQUITOES OF NORTH AMERICA 



demons, in which cases they were associated with Aedes atropalpus. The eggs 

 are found floating on the water singly and the larvae hatch quickly. They feed 

 exclusively upon other mosquito larvae present, which they swallow whole. 

 They feed largely upon Orthopodomyia signifer and Aedes triseriatus but will 

 also eat other larvse when opportunity offers, even of their own species. Hi- 

 bernation occurs as fully grown larva and pupation follows in the spring, as 

 shown by Morgan and Cotton. There are probably several generations during 

 the season, as the imagos occur from early spring until late in the autumn. 

 The larvae can only overwinter in tree-holes containing permanently a supply 

 of water. The adults are diurnal, both sexes frequenting flowers. Mr. Thibault 

 has made the following observations which seem to stand in relation to the 

 mating habits : " I find the males of a certain locality all go to some certain 

 tree or bush and are always to be found there, yet not a single female wiU be 

 seen. I have looked at all times of the day and before day and after night. I 

 took all my males (a hundred or so) on some poison ivy that grew on a hack- 

 berry tree 100 yards from the breeding log. I could always find them here 

 after they just made their appearance and nowhere else. The most of them 

 were taken from the same bunch of leaves; but not a female did I ever see 

 there." 



Southeastern part of United States. 



Washington, District of Columbia, September 9, 1901 (J. Kotinsky) ; Cabin 

 John, Maryland, September, 1908 (F. Knab) ; Plummer's Island, Maryland, 

 June 24, 1906 (A. K. Fisher), September 6, 1908 (B. A. Schwarz), April 18, 

 1913 (H. S. Barber), July 25 (W. V. Warner) ; Great Falls, Virginia, Sep- 

 tember 17, 1906 (T. Pergande) ; Woodstock, Virginia, June, 1903 (F. C. 

 Pratt) ; Skyland, Virginia (Miss W. Pollock) ; Glen Carlyn, Virginia, July 14, 

 1907 (F. Knab) ; Fairfax County, Virginia, May 3, 1913 (G. S. Miller) ; 

 Morgantown, West Virginia, June 10, 1898 (A. D. Hopkins) ; Hartsville, 

 Iforth Carolina (J. L. Coker) ; Grandfather Mountain, between Eock and Idn- 

 ville, Forth Carolina, August 28, 1906 (P. Sherman) ; Atlanta, Georgia (W. B. 

 Summerall) ; Augusta, Georgia, September 10, 1909 (W. V. Reed) ; Knox- 

 ville, Tennessee, April 13, 1907 (Morgan & Cotton) ; St. Louis, Missouri, 

 October 4, 1904 (A. Busek) ; Scott, Pulaski County, Arkansas, July 24, 1908, 

 February 20, 1909 (J. K. Thibault, Jr.) ; Ringo, Indian Territory (A. N. Cau- 

 dell) ; Dallas, Texas, August 13, 1906 (Crawford & Pratt) ; Baton Rouge, 



Louisiana (J. W. Dupree) ; Benoit, Mississippi, July 18, 1899 ( ) ; 



Agricultural College, Mississippi, September 26, 1905 (W. V. Eeed). Reported 

 also from Church Hill, Tennessee (Morgan & Cotton). 



Megarhinus septentrionalis was for a long time confused with other species, 

 as the sexual dichromatism of the tarsi in the species of this genus was not 

 recognized and it was thought that the species were subject to variation. They 

 are, however, quite constant in markings. The first reference to this species is 

 by Walker, who cites it under the name Megarhina ferox Wiedemann, but in an 

 error of identification, since Wiedemann's Gulex ferox is another species. Since 

 then the males have been rather consistently referred to portoricensis, the 

 females to rutila. 



MEGARHINUS MOCTEZUMA Dyar & Knab. 



Megarhinus moctezuma Dyar & Knab, Smiths. Misc. Colls., quart, iss., xlvlii, 247, 248, 



251, 1906. 

 Megarhinus montezuma Theobald, Men. Culic, v, 602, 1910. 



Obiginal Dbsobiption of Megarhinus moctezuma; 



Male. — Head behind the eyes clothed with Iridescent scales, at the sides and 

 beneath silvery. Antennse densely plumose; second segment longer than in sep- 

 tentrionalis, stout, laterally compressed, about as long as the three succeeding ones; 

 heavily scaled along the crest. Palpi deep violet, on segments 2-4 scatteringly 



