Carpenter et al.: Mosquitoes of Southern U. S. 191 



segment longer than wide, with dorsal plate finely spinose apically and extend- 

 ing a little more than half way down the side; lateral hair single; dorsal brush 

 consisting of a long lower caudal hair and a shorter multiple upper caudal tuft 

 on either side; ventral brush large, with several small tufts preceding the barred 

 area; gills 4, about as long as the anal segment, tapered. 



distribution. — A rare species occurring in the Eastern United States. 

 Southern States: Arkansas (31); Kentucky (140); Louisiana and Mississippi 

 (96); Missouri and Virginia (54). Other States: Delaware (106); Illinois 

 (42); Maryland and New Jersey (52); New York (116); Ohio (Vernard, 

 1943, unpublished). 



BIONOMICS. — Very little is known of the habits of the adults of this species. 

 Dr. Carl Vernard, who collected a good series of male and female specimens 

 during May, 1943, in Ohio, states that the females are fierce biters. Aedes 

 grossbecki breeds in early spring pools and is apparently single brooded. 



Aedes (Ochlerotatus) inhrmatus Dyar and Knab 



Aedes infirmatus Dyar and Knab, 1906, Jour. N. Y. Ent. Soc. 14:197. 



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

 scaled; palpi short, dark. Occiput dorsally with a rather broad longitudinal 

 stripe of white lanceolate scales, extending forward between the eyes; this 

 median stripe bounded on either side by a large patch of broad brownish- 

 yellow scales surrounding a dark-scaled patch; lateral region of occiput clothed 

 with broad appressed dingy-yellow to brownish-yellow scales. Erect forked 

 scales numerous, those on central portion of occiput pale. Thorax: Integument 

 of scutum dark brown, clothed with fine dark bronzy-brown scales, except for 

 a few pale scales on prescutellar space and a broad silvery-white to pale-yellow 

 scaled median longitudinal stripe extending from the anterior margin of scutum 

 to a little beyond the middle (this longitudinal stripe about half as wide as 

 scutum). Dorsal half of posterior pronotum covered with narrow dark-brown 

 scales. Abdomen: Tergites dark scaled, with conspicuous basal triangular 

 patches of white scales laterally; venter white scaled, occasionally speckled with 

 a few dark scales. Legs: Legs entirely dark scaled except for femora I and II 

 having the inner surfaces pale and III having all aspects of basal two-thirds 

 pale. Wing: Scales narrow, dark. 



ADULT MALE. — Coloration similar to that of female, but with narrow basal 

 white bands usually present on some segments of abdomen, terminalia (Fig. 

 102A). Lobes of ninth tergite (IXT-L) about as long as broad, separated by 

 about the width of one lobe, or a little less, each bearing several short spines. 

 Tenth sternite (X-S) prominent, heavily sclerotized beyond middle. Phallo- 

 some (Ph) stoutly conical, nearly one and three-fourths times as long as 

 broad, rounded apically, open ventrally, closed dorsally. Claspette (Cl-S) 

 pilose, slender, curved, extending well beyond basal lobe. Claspette filament 

 (Cl-F) about four-fifths as long as stem, expanded blade-like, tapered and 

 curved beyond middle; the blade-like portion with a large sharp retrorse pro- 

 jection arising from its basal margin; one or more smaller accessory retrorse 



