PSOROPHOEA LUTZn 557 



of each there arises a recumbent, stout blunt spine, two-thirds the length of the 

 reticulation. 



The larvae live in temporary rain-puddles. The coat of spines with which the 

 eggs are covered probably serve to prevent desiccation. The eggs are apparently 

 laid upon the ground at a place where water is liable to collect, and remain un- 

 hatched until after a rain. The winter is passed in the egg-state. We have no 

 direct observations on the life history and nothing is known of the mating habits 

 of the adults. The larval stages are passed rapidly, as with all the species of this 

 group. In the northern part of its range the larva is rare, being seldom found. 

 Dr. Dyar obtained one larva in a puddle in a road at Grassymead, Virginia. 

 The adult females are active and voracious biters, but are only common enough 

 to be troublesome in the South. They are not in the habit of frequenting houses. 

 Apparently they are diurnal. Mr. Barber has observed the males on flowers and 

 Mr. Knab captured a female specimen on a flower. Mr. Thibault states that the 

 female is " one of the most persistent as well as painful biters. Also trouble- 

 some to stock." 



Atlantic and Gulf States, Mississippi Valley, Cuba, and Bahamas. 



Chicopee and Springfield, Massachusetts, July 16, 1903 (F. Knab) ; Saxe- 

 ville, Wisconsin, July 29, 1909 (B. K. Miller) ; Algonquin, Iowa (H. J. 

 Quayle) ; Hyattsville, Maryland, September 1 (A. Busck) ; Glencarlyn, Vir- 

 ginia, July 23, 1901 (N. Banks) ; Washington, District of Columbia, Septem- 

 ber 9, 1901 (W. E. Hinds) ; Luray, Virginia, September 2, 1906 (F. Knab) ; 

 Woodstock, Virginia (F. C. Pratt) ; Plummer's Island, Maryland (H. S. 

 Barber) ; Greensboro, North Carolina, August 8, 1901 (F. C. Pratt) ; Columbia, 

 South Carolina, August 1, 1906; Agricultural College, Mississippi, May 18, 

 1901 (G. W. Herrick) ; Jackson, Tutwiler, Belzona, Clarksdale, Westpoint, and 

 Corinth, Mississippi, August, 1904 (H. S. Barber) ; Natchez, Mississippi, July 

 23, 1904 (F. S. Shaw) ; Eives and Athens, Tennessee, August, 1904 (H. S. 

 Barber) ; Helena, Arkansas, July 30, 1904 (H. S. Barber) ; Scott, Pulaski 

 County, Arkansas, August 11, 1909 (J. K. Thibault, Jr.) ; Corbin, Kentucky, 

 August 24, 1904 (H. S. Barber) ; Jacksonville, Texas, October 12, 1905 (W. D. 

 Pierce) ; Dennison, Texas, June 25, 1904 (H. S. Barber) ; Dallas, Texas, August 

 31, 1906 (P. C. Pratt) ; West Tampa, Florida, March 18, 1905 (H. G. Dyar) ; 

 Tarpum Bay, Bahamas, 1903 (T. H. Coffin )j Cayamas, Cuba, May 30 (C. F. 

 Baker, E. A. Schwarz ) . 



Psorophora sayi is closely related to P. posticatus and the two have been con- 

 fused by most authors. They may be readily distinguished by the ornamenta- 

 tion of the abdomen, the present species having the venter nearly wholly pale- 

 scaled, while in posticatus there are broad violaceous bands. The white on the 

 hind tarsi varies in extent, in some specimens being restricted to the last two 

 joints, in others involving the apical portion of the third Joint. The latter is 

 the common form on the mainland, while the former prevails in Cuba and the 

 Bahamas, but these limits are not absolute. 



PSOROPHORA LUTZII (Theobald). 



Janthinosoma lutzii Theobald, Mon. Culic, i, 257, 1901. 



Janthinosoma lutzii Giles, Gnats or Mosq., 2 ed., 339, 1902. 



Janthinosoma lutzii Parker, Beyer and Pothier, Bull. 13, Yell. Fever Inst., U. S. Publ. 



Health & Marine-Hosp, Serv., 37, 40, 1903. 

 Janthinosoma discrucians Theobald (not Walker), Mon. Culic, iii, 126, 1903. 

 Janthinosoma discrucians Blanchard (not Walker), Les Moustiques, 232, 1905. 

 lanthinosoma lutzi Blanchard, Les Moust., 236, 1905. 

 Janthinosoma lutzii Goeldi, Os Mosq. no Pard, 119, pi. 4, fig. 16, 1905. 

 Janthinosoma lutzii Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. No. 11, 17, 1906. 

 Janthinosoma albipes Theobald, Mon. Culic, iv, 157, 1907. 

 Aedes lutzii Busck, Smiths. Misc. Colls., quart, iss., Iii, 63, 1908. 

 Janthinosoma lutzi Peryassu, Os Culic. do Brazil, 152, 1908. 

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



