572 MOSQUITOES OF NOKTH AMERICA 



rectangular rounded base, long central spine, conical, pointed, and a shorter but 

 similar one on each side. Anal segment much longer than wide, ringed by the 

 plate; dorsal tuft a long hair and brush on each side; a small lateral tuft; 

 ventral brush well developed, extending along ventral line to near base. Anal 

 gills long, longer than the segment, tapered to a sharp tip ; each with a single 

 central trachea. 



Egg. — Pointed-fusiform, flattened on one side, rather long and narrow; 

 sculpture of elongate hexagonal reticulations, from micropylar end of each there 

 arises a recumbent, stout blunt spine, two-thirds the length of the reticulation ; 

 a square gelatinous cushion at micropyle. 



The larvae live in ground-pools. Mr. Knab bred a specimen from a larva in 

 a cacao-husk. We have no special information about the habits which are said 

 by Thibault to be similar to those of Psorophora sayi. 



Southern United States, through Mexico and Central America to South 

 America, especially in dry regions. 



Augusta, Georgia, August 10, 1909 (W. V. Eeed) ; Wister, Indian Territory, 

 July 7, 1904 (H. S. Barber) ; Scott, Arkansas, September 1, 1908 (J. K. Thi- 

 bault, Jr.) ; Clarksdale, Mississippi, August 1, 1904 (H. S. Barber) ; Natchez, 

 Mississippi, May 8, 1907 (A. Fleming) ; Belzona, Mississippi, August 4, 1904 

 (H. S. Barber) ; Tutwiler, Mississippi, August 2, 1904 (H. S. Barber) ; West- 

 point, Mississippi, August 11, 1904 (H. S. Barber) ; Agricultural College, 

 Mississippi, May 18, 1901 (G. W. Herrick) ; Las Peiias, State of Jalisco, Mexico, 

 July 14, 1903 (A. Duges) ; Coatzacoalcos, Mexico (A. Duges) ; Tehuantepec, 

 Mexico, July 2, 1905 (F. Knab) ; Salina Cruz, Mexico, July 10, 1905 (F. 

 Knab) ; Champerico, Guatemala, August 4, 1905 (F. Kjiab) ; Ceiba, Honduras 

 (D. P. Albers) ; Puerto Barrios, Honduras (D. P. Albers) ; Port Limon, Costa 

 Bica, September 38, 1905 (F. Knab) ; Sao Paulo, Brazil (A. Lutz). Beported 

 also from Trinidad (Theobald) ; Ladario, State of Matto Grosso, Juiz de Fora, 

 State of Minas Geraes, Bio de Janeiro, Taubate and Santos, State of Sao Paulo, 

 Brazil (Peryassli) ; Las Conchas, Zdrate and Baradero, Province of Buenos 

 Aires, Formosa, Chaco Territory, Argentine Eepublic ( Arribdlzaga) . 



The types of varipes are in poor condition, so that the author of that name 

 considered them to represent a different species from discrucians, namely one 

 without a median stripe of dark scales on the mesonotum, although he notes the 

 presence of a few dark scales in his original description. The species as de- 

 fined is, therefore, fictitious, no such species occurring upon the mainland of 

 North America. The species in the Antilles that do have such a coloration, can 

 not be cited as varipes since no specimens from that region are cited by Coquil- 

 lett among his types, or were before him at the time. The specimens from the 

 Bahamas so labeled by him in the TJ. S. National Museum collection were re- 

 ceived subsequently to the publication of the description. 



PSOROPHORA JOHNSTONII (Grabham). 



Janthinosoma johnstonii Grabham, Can. Bnt., xxxvli, 410, 1905. 

 Janthinosoma schwarzi Dyar & Knab, Proc. Biol. Soc. Wash., xix, 135, 190G. 

 Janthinosoma varipes CoqulUett (in part, not CoqulUett), tJ. S. Dept. Agr., Bur. Bnt., 



Tech. Ser. 11, 17, 1906. 

 Janthinosoma varipes Theobald (in part, not CoqulUett), Men. Cullc, iv, 154, 1907. 

 Aedes schwarsi Pazos, San. y Ben., il, 46, 317, 1909. 



Janthinosoma varipes Pazos (not CoqulUett), San. y Ben., ii, 51, 680, 1909. 

 Janthinosoma varipes Theobald (In part, not CoqulUett), Mon. CuUc, v, 121, 1910. 

 Janthinosoma schwarzi Theobald, Mon. Cullc, v, 604, 1910. 



Obiginal Description of Janthinosoma johnstonii: 



Head covered with broad pale yellow and violet spindle-shaped scales; a cluster 

 of black bristles between the eyes; a group of upright black forked scales at the 

 back of the head. Eyes deep reddish-purple, bordered posteriorly by a row of white 



