PSOROPHORA DISCRUCIANS 569 



they travel for miles on horses and cattle. In September of this year they made 

 cotton picking and road work impossible in places here. They stay in grass and 

 bushes and as soon as these are disturbed they sally forth in swarms. I have sat 

 quietly for an hour where I knew them to be abundant and scarcely saw one, but 

 when I would get up and walk around and shake up the grass and bushes and 

 then sit down again they would immediately cover me. This is partly true of all 

 the out-of-doors mosquitoes. Abundant at intervals from last of May till 

 October." 



Southwestern United States, western Mexico and Yucatan, northern Co- 

 lombia, principally in dry regions. 



Wellington, Kansas, May, 1908 (E. 0. Q. Kelly) ; Fort Smith, Arkansas, July 

 8, 1904 (H. S. Barber) ; Vanburen, Arkansas, July 6, 1904 (H. S. Barber) ; 

 Scott, Arkansas, July 17, 1908 (J. K. Thibault, Jr.) ; Shreveport, Louisiana, 

 June 23, 1905 (H. A. Morgan) ; Roosevelt, Texas, September 16, 1906 (P. C. 

 Pratt) ; Clarkeville, Texas, August 29, 1905 (P. E. Jones) ; Dallas, Texas, 

 August 31, 1906 (P. C. Pratt) ; Austin, Texas, August 8, 1903 (A. W. Morrill) ; 

 Hetty, Texas, July 10, 1904 (P. C. Bishopp) ; Paris, Texas, June 17, 1907 (P. 

 C. Bishopp) ; Cotulla, Texas, April 15, 1907 (P. C. Pratt) ; Victoria, Texas, 

 September 14, 1903 (W. E. Hinds) ; Dallas, Texas, May 12, 1906 (A. W. 

 Morrill) ; Brownsville, Texas, May 13, 1904 (H. S. Barber) ; Nautla, State of 

 Jalisco, Mexico (A. Dug^s) ; Salina Cruz, State of Oaxaca, Mexico, July 9, 

 1905 (P. Knab) ; Tehuantepec, State of Oaxaca, Mexico, June 29, 1905 (P. 

 Knab) ; Yucatan, Mexico (A. L. Herrera) ; Santa Marta, Colombia (J. H. 

 Egbert). 



PSOROPHORA DISCRUCIANS (Walker). ^^ t-Zi-'i^t 



Culex discrucians Walker, Ins. Saund., 430, 1856. 



Janthinosoma discrucians Arribaizaga, Rev. Mus. de La Plata, ii, 153, 1891. 



Gulex discrucians Giles (In part). Gnats or Mosq., 277, 1900. 



OuleiD discrucians Theobald, Men. Cullc, 1, 258, 1901. 



Janthinosoma arrihalzagae Giles, Gnats or Mosq., 2 ed., 339, 341, 1902. 



Janthinosoma arrihaleagae Theobald, Men. Culic, iii, 128, 1903. 



Conchyliastes varipes Coquillett, Can. Ent., xxxvi, 10, 1904. 



Janthinosoma arrihalzagae Lutz, in Bourroul, Mosq. do Brasil, 71, 1904. 



Janthinosoma arribalzagai Blancbard, Les Moust., 235, 1905. 



lanthinosoma varipes Blancbard, Les Moustiques, 626, 1905. 



Janthinosoma varipes Dyar & Knab, Journ. N. Y. Ent. See, xiv, 181, 1906. 



Janthinosoma varipes Dyar, U. S. Dept. Agr., Bur. Ent, Circular 72, 3, 1906. 



Janthinosoma discrucians Dyar & Knab, Proc. Biol. See. Wash., xix, 134, 1906. 



Janthinosoma discrucians Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 17, 



1906. 

 Janthinosoma varipes Coquillett (In part), U. S. Dept. Agr., Bur. Ent, Tech. Ser. 11, 



17, 1906. 

 Janthinosoma arribalzagae Autran, Anal. Dep. Nac. Hig., xiv, 14, 1907. 

 Janthinosoma discrucians Theobald, Men. Cullc, iv, 158, 1907. 

 Janthinosoma varipes Theobald (in part), Mon. Culic, iv, 154, 1907. 

 Culex (Janthinosoma) varipes Viereck, Blrst Rept. Comm. Health Pa., 471, 1908. 

 Janthinosoma arrihalzagae Peryassli, Os Culic. do Brazil, 62, 1908. 

 Janthinosoma discrucians PeryassQ, Os Culic. do Brazil, 43, 154, 1908. 

 Aedes discrucians Thibault, Proc. Ent. See. Wash., xii, 17, 1910. 

 Janthinosoma discrucians Theobald, Mon. Culic, v, 120, 1910. 

 Janthinosoma varipes Theobald (in part), Mon. Culic, v, 121, 1910. 



Obioinal Desceiption of Cuu;x disceucians : 



Nigricans; pectus argenteum; abdomen purpureum, suMus testaceo fasciatum; 

 pedes purpurei, femoribus testaceis, genubus albo guttatis, tarsis fascia subapicali 

 alba; alae subcinereae, venis fuscis subciliatis; halteres testacei, apice fusci. Mas. — 

 Antennae testaceo fasciatcB. 



Blackish. Proboscis long, slender. Pectus silvery whitish. Abdomen purple, with 

 testaceous bands beneath. Legs purple, long, slender; femora testaceous, purplish 

 towards the tips; a white dot on each knee; tarsi with a white subapical band. 

 Wings grayish; veins brown, slightly ciliated. Halteres testaceous, with brown tips. 



37 



