342 MOSQUITOES OF NORTH AMERICA 



within ; row of long hairs at tip, running down along the suture ; outer half with 

 two filaments below middle and a spine on other side. Palpus small, with four 

 irregular terminal digits. Thorax rounded, wider than long; abdomen mod- 

 erate, the anterior se.gments shorter, lateral hairs multiple on first two seg- 

 ments, in twos on third to sixth ; skin pilose ; tracheae broad. Air-tube long, 

 slender, uniformly tapered, seven times as long as wide; pecten short, reach- 

 ing one-fourth ; single teeth broad with four to six branches ; four single hairs 

 on posterior margin beyond pocton, third moved laterally out of line. Lateral 

 com!) of eighth segment of small, narrow spines in a rather large triangular 

 patch ; single spine elongate, widened at tip, with an apical fringe of spinules. 

 Anal segment longer than wide, ringed by the plate ; dorsal tuft a group of long 

 hairs on each side ; a single lateral hair ; ventral brush well developed, confined 

 to the barred area. Anal gills long, twice as long as the segment, regularly 

 tapered to tip. 



The larvae live in ground-pools of foul water and also in artificial receptacles. 

 Mr. Busck found them in an extended, open, lagoon-pool and in an old bucket 

 in a field. Taylor has observed the eggs and states that they are laid in a raft, 

 in the manner of Culex pipiens. The mass is said to be smaller than that of 

 Culex quinquefasciatus, which commonly occurs in the same water, and tlie 

 number of eggs is from 200 to 300. The individual eggs measure 0.6 mm. in 

 length and 0.14 mm. in diameter. 



Antilles and Florida ; a varietal form in British Guiana. 



St. Vincent, West Indies, July 14, 1905 (A. Busck) ; Santo Domingo, August 

 17 and 22, 1905 (A. Busck) ; Kingston, Jamaica (M. Grabham) ; Havana, Cuba, 

 January 20, 1904 (J. E. Taylor) ; Xew Providence Island, Bahamas, February, 

 1915 (H. G. Dyar); Jacksonville, Florida, March 4, 1905 (H. G. Dyar), 

 October 12, 1908 (H. Byrd) ; Pokatee, Florida, March 19, 1905 (A. N". Cau- 

 dell) ; Green Cove Springs, Florida (A. N". Caudell) ; Miami, Florida, March, 

 1905 (Dyar & Caudell). 



Culex si7nilis was first identified as Culex nigritulus, in error, and subse- 

 quently described by Theobald as Culex similis. The Culex scolasUcus and C. 

 palus of Pazos are misidentifications, as we have determined from the specimens 

 concerned. Culex regulator was named from larva?, but proves to be the same 

 species. Specimens received from ]\Ir. J. Aiken in British Guiana were named 

 Culex aikenii, subsequently changed to Culex lachrimans, owing to preoccupa- 

 tion of the name. The adults and larvae, it now appears, were wrongly asso- 

 ciated by the collector, the adults proving to be Culex quinquefasciatus, the 

 larvae Culex similis. The true adults of these larvse have been found among the 

 material sent by Mr. Aiken, and prove to be Culex similis, but differing from the 

 Antillean type especially in the lack of lateral production of the band on the 

 sixth abdominal segment. We therefore consider them to be a distinct geo- 

 graphical race, for which the varietal name Culex similis lachrimans may be 

 retained. This race does not occur in the territory covered by the present work, 

 and we therefore give it no further consideration in this connection. The 

 specimens recorded by Theobald from Xew Amsterdam, British Guiana ( Journ. 

 Econ. Biol., I, 33, 1905, and Mon. Culic, iv, 448, 1907), are undoubtedly this 

 race. Culex similis is closely related to C. salinarius and replaces that species 

 in the Antilles and in Florida, 



Culex palus Theobakl may prove to be an earlier name for this species (see 

 our remarks under C. palus). 



CULEX PALUS Theobald. 



Culex palus Theobald, Mon. Culic, iii, 194, 1903. 



Culex palus Theobald, Mon. Culic, iv, 456, 1907. 



Culex palus Aiken, Brit. Guiana Med. Annual, xv, 65, 1907. 



Culex palus Theobald, Mon. Culic, v, 360, 1910. 



