54 INSECUTOR INSCITI^E MENSTRUUS 



specimens occur elsewhere, and the name cannot represent 

 more than a variety. In southern Mexico and Central America 

 a form occurs in which the yellow lines on the mesonotum are 

 widened posteriorly or somewhat irregular. This may be dis- 

 tinguished as 



Aedes trivittatus cuneatus Dyar & Knab. 



A'edes cuneatus Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 54, 



1908. 

 Aedes argentescens Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 



55, 1908. 

 Aedes cuneatus Theobald, Men. Culic, v, 620, 1910. 

 Aedes argentescens Theobald, Men. Culic, v, 620, 1910. 

 Aedes cuneatus Howard, Dyar & Knab, Mosq. No. & Cent. Am. 



& W. I., iv, 770, 1917. 

 Aedes (Ochlerotatus) cuneatus Dyar, Ins. Ins. Mens., vi, 77, 1918. 

 Aedes (Heteronycha) cuneatus Dyar, Ins. Ins. Mens., viii, 105, 



1920. 



Besides the localities mentioned in the monograph, specimens 

 have been taken in Costa Rica by Dr. A. Alfaro, Ciruelas, 

 November 14, 1920 ; San Jose, November 23, 1920 ; Matapolo, 

 January 16, 1921 ; Aquiares, February 28, 1921 ; Birris, March 

 12, 1921 ; Puntarenas, July 15, 1921. 



Species 3 

 Aedes (Ochlerotatus) tortilis Theobald. 



Culex tortilis Theobald, Entom., xxxvi, 281, 1903. 



Culcx tortilis Theobald & Grabham, Mosq. or Culic. of Jamaica, 



26, 1905. 

 Aedes auratus Grabham, Can. Ent., xxxviii, 313, 1906. 

 Aedes auratus Dyar & Knab, Proc. Biol. Soc. Wash., xix, 163, 



1906. 

 Culex tortilis Theobald, Mon. Culic, iv, 428, 1907. 

 Culex tortilis Theobald, Mon. Culic, v, 598, 1910. 

 A'edes tortilis Howard, Dyar & Knab, Mosq. No. & Cent. Am. & 



W. I., iv, 806, 1917. 

 A'edes (Ochlerotatus) tortilis Dyar, Ins. Ins. Mens., vi, 77, 1918. 

 A'edes (Heteronycha) tortilis Dyar, Ins. Ins. Mens., viii, 105, 1920. 



This form inhabits the Antilles. In the monograph we 

 treated the forms occurring on the several islands as species. 

 I think it will be better to use the subspecific conception for 



