AEDES SCAPULARIS 783 



ligulate, with a sharp retrose branch beyond. Unci approximate, revolute, the 

 middle forming a small basal cone. Basal appendages small, approximate, 

 bearing three stout spines at tip. 



Larva, Stage lY. Head rounded, narrowed before eyes, a notch at insertion 

 of antennas, front margin arcuate. Antennae cylindrical, slender, nearly uni- 

 form, sparsely spined all over; tuft small, before middle ; two stout spines at tip, 

 a small spine, a sessile digit and one on a pedestal. Eyes large, transverse. 

 Both pairs of dorsal head-hairs single, ante-antennal tuft multiple. Mental 

 plate rounded triangular, the central tooth scarcely larger than the others, of 

 which there are sixteen on a side, the last two detached. Mandible quadrangu- 

 lar ; two filaments before tip ; an outer row of stout cilia ; a row of thirteen fila- 

 ments on front margin ; dentition of four teeth on a projection, the first blunt 

 and widened at tip, the fourth long; filaments before and within; two double 

 teeth at base ; process below furcate, with patches of hair ; an angle below ; four 

 long hairs within and four longer ones at base. ]\Taxilla hemispherical, divided 

 by a band-shaped suture ; inner half hairy, the hairs in tufts inwardly, the tufts 

 on pedicel on the edge, a long tuft at tip ; inner half with small hairs near the 

 palpus, the two filaments situated near tip ; palpus three times as long as wide, 

 rather large, constricted in the center, two small digits and two minute ap- 

 pressed ones. Thorax rounded, wider than long ; hairs abundant, not long, the 

 subdorsal prothoracic hairs single. Abdomen stout, anterior segments shorter; 

 hairs moderate, the lateral hairs double on first two segments, single on third 

 to sixth; secondary hairs short, in tufts; tracheal tubes broad, band-shaped, 

 expanded into large bladders in the thorax. Air-tube stout, slightly tapered 

 on outer half, three times as long as wide ; pecten reaching to middle, the teeth 

 evenly spaced, followed by a single hair- tuft; single pecten-tooth a long spine 

 with six branches at base. Lateral comb of eighth segment of many scales in a 

 triangular patch ; single scale elongate triangular, with a long apical spinule 

 half as long as body of the scale and a fringe of smaller spinules. Anal segment 

 longer than wide, ringed by the plate; dorsal tuft a brush and hair on either 

 side ; a single lateral hair; ventral brush well developed, confined to barred area; 

 anal gills moderate, ensiform, longer than the segment. 



Egg (plate 146, fig, 680). Broadly fusiform, black, the sculpture of rhom- 

 boidal reticulations. 



The larvae live in temporary ground-pools, particularly the edges of marshes. 

 The eggs probably hibernate and hatch after rains during the summer, and a 

 number of generations succeed each other during the year. The eggs are laid 

 singly. Mr. Thibault says of this mosquito : 



" Locally abundant at intervals. Mostly after rains. In woods and thickets. 

 Sometimes about dwellings. Does not enter houses extensively. A summer 

 mosquito. Taken at about same time and in same places as tormentor. A per- 

 sistent biter; quite annoying where it is plentiful." 



Gulf States. 



New Orleans, Louisiana, July 18, 1901 (G. E. Beyer) ; New Orleans, Louisi- 

 ana, 1903 (L. G. Gill) ; Baton Rouge, Louisiana (J, W. Dupree) ; Scott, 

 Arkansas, August 31, 1908 (J. K, Thibault, Jr.) ; West Tampa, Florida, March 

 18, 1905 (H. G. Dyar) ; Bartow, Florida, March 20, 1905 (A. N. Caudell), 



AEDES SCAPULARIS (Rondani) Pazos. 



Culex scapularis Rondani, Studi ent., Baudi e Truqui, 109, 1848. 



Ochlerotatus conflrmatus Lynch-Arribalzaga, Rev. Museo de la Plata, ii, 146, 1891. 



Culex conflrmatus Giles, Handb. Gnats or Mosq., 320, 1900. 



Culex conflrmatus Theobald, Mon, Culic, ii, 42, 1901. 



Culex conflrmatus Giles, Handb. Gnats or Mosq., 2 ed., 443, 1902. 



