552 MOSQUITOES or north AMERICA 



got them in a large muddy puddle in the bed of a stream at Almoloya, Mexico, 

 in a pond choked by vegetation near Puntarenas, Costa Rica, in a puddle within 

 the shell of a large tree that had been burned at the same place, and in a shallow, 

 weed-grown ditch along the railroad tracks at Zent, Costa Rica. The females 

 attack man and the bite is said to be painful. Goeldi states that they are 

 diurnal, attacking persistently during the hot hours, and that they are found in 

 the forest and in the open. The habits are not known further, but probably 

 agree with those of the allied species. 



Tropical America, Mexico and the West Indies to the Argentine. 



Sao Paulo, Brazil (A. Lutz) ; New Amsterdam, British Guiana, May 4, 1907 

 (J. Aiken) ; Berbice, British Guiana (J. Aiken) ; Georgetown, British Guiana 

 (E. D. Rowland) ; Surinam (H. Polak) ; Trinidad, British West Indies, June, 

 1905 (A. Busck) ; Kingston, Jamaica (M. Grabham) ; Santo Domingo, August, 

 1905 (A. Busck) ; Las Cascadas, Canal Zone, Panama, May 15, 1907 (A. 

 Busck) ; Tabernilla, Canal Zone, Panama (A. Busck) ; Lion Hill, Canal Zone, 

 Panama (A. Busck) ; Taboga Island, Panama, July 1, 1907 (A. Busck) ; 

 Chagres River, Panama, June 7, 1907 (A. Busck) ; Culebra, Panama, February 

 5, 1904 (W. M. Black) ; Gatun, Canal Zone, Panama, June 23, 1908 (A. H. 

 Jennings) ; Miraflores, Canal Zone, Panama, January 1, 1909 (A. H. Jen- 

 nings) ; Bluefields, Nicaragua (W. F. Thornton) ; 2Sent, 20 miles from Puerto 

 Limon, Costa Rica, September 26, 1905 (F. Knab) ; Las Loras near Puntarenas, 

 Costa Rica, September 8, 1905 (F. Knab) ; Corinto, Nicaragua, September 4, 

 1905 (F. Knab) ; Cacao, Trece Aguas, Alta Vera Paz, Guatemala, April 26, 

 1907 (Schwarz and Barber) ; Livingstone, Guatemala, November 5, 1907 (H. 

 S. Barber) ; Sonsonate, Salvador, August 19, 1905 (F. Knab) ; Tonala, Mexico 

 (A, Dug^s) ; Santa Lucrecia, State of Vera Cruz, Mexico, June 21, 1905 (F. 

 Knab) ; Tehuantepec, Mexico, July 5, 1905 (F. Knab) ; Almoloya, State of 

 Oaxaea, Mexico, July 19, 1905 (F. Knab). Reported also from Buenos Aires 

 and the islands of the Parana, Argentine (Brethes) ; States of Rio de Janeiro 

 and Bahia, Brazil (Lutz) ; Para, Brazil (Goeldi) ; Pernambuco, Minas Geraes, 

 Matto Grosso, Brazil (Peryassii). 



The synonymy of Psorophora posticatus is considerably confused, but we think 

 that we have correctly identified Wiedemann's species. A variety occurs, espe- 

 cially in the Antilles, in which there is no white tip on the third hind tarsal 

 joint. This was named echinata by Dr. Grabham and jamaicensis by Theobald. 

 A majority of the specimens from the Antilles, perhaps two-thirds, are of this 

 form, but the normal form also occurs. On the mainland the variety occurs in 

 much smaller proportion, perhaps 1 in 10 ; but its occurrence proves that a dis- 

 tinct species is not involved, nor yet a geographical race. Theobald has applied 

 the name posticata to specimens from the Antilles with only the last tarsal 

 joint white and which are here treated as Psorophora terminalis. Dr. Howard 

 has examined the type of Wiedemann's Culex posticatus at Vienna and found 

 that two joints of the hind tarsi are white and a statement to that effect was 

 published by Coquillett (U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 8, 1906). 

 We have not seen specimens from the Argentine, but there can hardly be a doubt 

 that Janthinosoma centrale Brethes is a synonym. 



PSOROPHORA TERMINALIS (Coquillett). 



Janthinosoma posticata Theobald (not Wiedemann), Mon. Culic, i, 253, 1901. 

 Janthinosoma posticata Giles (not Wiedemann), Gnats or Mosq., 2 ed., 339, 341, 1902. 

 Janthinosoma posticatum Blan chard (in part, not Wiedemann), Les Moust., 233, 1905. 

 Janthinosoma terminalis Coquillett, U. S. Dept. Agr., Bur. Ent, Tech. Ser. No. 11, 



8, 17, 1906. 

 Janthinosoma posticata Theobald (not Wiedemann), Mon. Culicid., iv, 154, 1907. 

 Janthinosoma posticata Theobald (not Wiedemann), Mon. Culic, v, 120, 1910. 



