Carpenter et al.: Mosquitoes of Southern U. S. 173 



slightly barbed, inserted at middle of shaft, not reaching tip. Head hairs: 

 Preantennal (A) multiple, sparsely barbed, projecting slightly beyond inser- 

 tion of antennal tuft; lower (B) and upper (C) single, sparsely barbed; post- 

 clypeal (d) small, multiple; sutural (e) single; trans-sutural (f) usually 

 double; supraorbital single. Lateral abdominal hairs double on segments I and 

 II, single on segments III to VI. Comb of eighth segment of about 5 or 6 

 large thorn-shaped scales in a single curved row; individual scale with minute 

 lateral spinules. Siphon about twice as long as wide; pecten of numerous even- 

 ly spaced teeth extending nearly to middle of siphon; subventral tuft multiple, 

 barbed, inserted beyond pecten. Anal segment slightly longer than wide, com- 

 pletely ringed by a heavily sclerotized dorsal plate; lateral hair single or double; 

 dorsal brush consisting of a long lower caudal hair and a shorter multiple 

 upper caudal tuft on either side; ventral brush well-developed, confined to the 

 barred area; gills 4, longer than the anal segment, the upper pair longer than 

 the lower pair. 



DISTRIBUTION. — Florida to New Jersey and west to Oklahoma and Texas. 

 Southern States: Alabama (71); Arkansas (83); Florida, Georgia and Louisi- 

 ana (52); Mississippi (125); Missouri (70); North Carolina (52); South 

 Carolina (64); Virginia (49). Other States: Delaware (106); District of 

 Columbia (52); Maryland (19); New Jersey (77); Oklahoma (159); Texas 

 (108). 



bionomics. — King et ai, (96) state that the females are vicious biters. 

 No characters are known for separating the females of A. atlanticus from those 

 of A. tormentor; therefore adult records are based on structures of male termi- 

 nalia. Larvae occur in temporary pools in both open fields and woodlands. 

 Breeding extends from March to November in the South (4th Sv. C. Med. 

 Lab. records, 1942-1944, unpublished). 



AeDES (OCHLEROTATUS) CANADENSIS (Theobald) 



Culex canadertsis Theobald, 1901, Mon. Culic, 2:3. 



ADULT FEMALE. — Medium sized species. Head: Proboscis dark scaled; 

 palpi short, dark, with a few white scales at tip and at base of segment 4. 

 Scales of postero-dorsal region of occiput narrow, whitish-yellow, arranged in a 

 sub-triangular patch projecting anteriorly on the mid line; scales dorsally mar- 

 gining eyes narrow, whitish-yellow; scales of submedian areas between the 

 postero-dorsal patch and eye margins narrow, golden brown. Lateral regions 

 of occiput clothed with broad whitish scales, often surroundnig a small dark- 

 scaled patch near eye margin. Erect forked scales numerous on dorsal surface 

 of occiput, those on central portion pale. Thorax: Integument of scutum red- 

 dish brown; vestiture of small narrow golden-brown scales, paler on anterior 

 and lateral margins and on prescutellar space; prescutellar space frequently 

 bordered on either side by a narrow submedian line of pale scales extending 

 anteriorly to near middle of scutum. Posterior pronotum clothed on dorsal 

 half with narrow brown scales. Abdomen: Tergites dark scaled, with narrow 

 transverse basal bands (frequently lacking) and conspicuous basal lateral 



