250 American Midland Naturalist Monograph No. 3 



(1); North Carolina (166); South Carolina (64); Tennessee (96); Virginia 

 (49). Other States: Arizona (52); California (66); District of Columiba and 

 Illinois (52); Iowa (128); Kansas (79); Nebraska (178); New Mexico (9); 

 Ohio (52); Oklahoma (159); Texas (108). 



BIONOMICS. — This is a troublesome, domesticated species that commonly 

 infests houses and bites at night. Larvae are found in rainbarrels, tubs, catch 

 basins, cesspools, ditches containing filth, and similar habitats. A heavy popula- 

 tion of C. quinquefasciatus is usually associated with insanitary conditions. 

 Larvae and adults occur throughout the year in the extreme South (4th Sv. C. 

 Med. Lab. records, 1942-1944, unpublished). 



MEDICAL IMPORTANCE. — Culex quinquefaiciatus is an important vector of 

 Wuchereria bancrofti in tropical and subtropical regions of the world. It is a 

 known vector of the parasites causing bird malaria. 



CuLEX (CuLEx) RESTUANS Theobald 



Culex resluam Theobald, 1901, Mon. Culic, 2:142. 



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

 usually with some pale scales on under side; palpi short, dark. Broad dorsal 

 region of occiput clothed with narrow whitish to golden brown scales, the paler 

 ones bordering the eyes and on the median and posterior portions; numerous 

 dark erect forked scales present. Lateral region of occiput clothed with broad 

 whitish scales. Thorax: Integument of scutum light brown to reddish brown; 

 vestiture of fine golden-brown lanceolate scales, distinctly paler on anterior and 

 lateral margins and on prescutellar space; a pair of small pale-scaled submedian 

 spots usually present near middle of scutum (frequently absent). Pleura with 

 a few patches of broad pale scales. Abdomen: Tergites dark scaled with bronze 

 to metallic blue-green reflection; each tergite except the first with a broad basal 

 band of white to whitish-yellow scales, usually somewhat irregular on posterior 

 margin (rarely as evenly rounded as in C. quinquefasciatus), not appreciably 

 constricted laterally, broadly joining a pair of basal lateral whitish patches. 

 Venter mostly pale scaled. Legs: Legs dark scaled with bronze to metallic blue- 

 green reflection except for pale inner surfaces of femora, small pale knee spots, 

 pale streaks on inner surfaces of tibiae, and a few white scales at tips of tibiae. 

 Wing: Scales narrow, dark. 



ADULT MALE. — Coloration similar to that of female. TERminalia (Fig. 

 138A). Lobes of ninth tergite (IXT-L) prominent, rounded, each bearing 

 several small setae. Tenth sternite (X-S) crowned with numerous short pointed 

 spines; basal arm (XS-BA) long, stout, usually curved, weakly sclerotized. 

 Phallosome (Ph) formed of two large moderately sclerotized plates. Each 

 plate apically with a long slender ventral arm (Ph-VA) directed posteriorly. 

 Each plate basally with a short blunt dorsal arm (Ph-DA) curved outwardly 

 to lock with the paramere; a short stout triangular tooth (Ph-T) arising iust 

 posterior to the small dorsal arm. Claspette absent. Basis tyle (Bs) about two 

 and one-half times as long as basal width, with outer margin curved, portion 



