CULISETA 475 



Theobaldia and CuUseta Felt, Bull. 97, N. Y. State Mus. 448, 480, 481, 1905. 



Theobaldinella Blanchard, Les Moust., 390, 1905. 



Theobaldia Theobald, Gen. Ins., 26me Fasciule, 23, 1905. 



Theohaldia Aldrich, Cat. N. A. Dipt., Smiths. Misc. Coll., xlvl, 126, 1905. 



TheoMldia Dyar, Proc. Ent. Soc. Wash., vii, 45, 48, 1905. 



Theohaldia and CuUseta Coquillett, Science, n. s., xxiii, 313, 1906. 



Theohaldia and CuUseta Coquillett, U. S. Dept. Agr., Bur. Entom., Tech. Ser. 11, 16, 



22, 1906. 

 CuUseta Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 178, 203, 1906. 

 CuUseta Dyar & Knab, Can. Ent., xxxix, 48, 1907. 

 Theohaldia Theobald, Mon. Culicid., iv, 275, 1907. 

 CuUseta Theoba'.d, Mon. Culic, iv, 383, 1907. 

 Pseudotheohaldia Theobald, Mon. Culic, iv, 150, 271, 1907. 

 CuUseta Williston, Man. No. Am. Dipt, 3 ed., 108, 1908. 

 Theohaldia Pazos, San. y Ben., li, 40, 1909. 

 CuUseta Pazos, San. y Ben., ii, 43, 1909. 

 Theohaldia Theobald, Mon. Culic, v, 116, 270, 1910. 

 Pseudotheohaldia Theobald, Mon. Culic, 115, 270, 1910. 

 CuUseta Theobald, Mon. Culic, 322, 1910. 



The type species are: Of Theohaldia Neveu-Lemaire, Culex annulatus 

 Schrank; of Culiseta Felt, Culex absohrinus Felt; of TUeohaldinella Blanchard, 

 Culex annulatus Schrank; of Pseudotheohaldia Theobald, Pseudotheohaldia 

 niveitceniata Theobald. 

 Generic Diagnosis of Adult: 



Proboscis slender; palpi short in the female, long in the male, as long as or longer 

 than the proboscis, the terminal portion usually thickened, club-shaped in some 

 species, never acuminate. Prothoracic lobes well separated. Clypeus and postnotum 

 nude. Antennae filiform in the female, the joints subequal, with basal whorls of 

 sparse, short, hairs; the last two joints long in the male, the others short, thickened 

 at the insertions of the hair-whorls; the hairs usually long, dense, plumose. Abdo- 

 men subcylindrical in the female, blunt at the apex; elongate and depressed in the 

 male, usually with long lateral ciliation. Wings rather broad, the cross-veins either 

 in line or approximately so; narrower in the male, the cross-veins often less dis- 

 tinctly in line. Legs rather long, the claws simple in the female, the hind tibial 

 scraper with a row of about eight spines. 



Generic Diagnosis of Lakva: 



Head rather small, widest through the eyes; antennae small, the hair tuft at the 

 middle. Air-tube rather short, with basal pecten followed by a row of long fine hairs; 

 a single pair of tufts situated very near the base. A lateral comb on the side of the 

 eighth segment, consisting of a patch of minute scales. Anal segment encircled by 

 the chitinous plate, with a ventral brush preceded by small tufts along the ventral 

 line. 



The genus Culiseta extends through the temperate portions of North America, 

 Europe, Asia, and Africa. Most of the species extend well toward the north, 

 some being confined to the subboreal regions. A few extend into the warmer 

 climates, but principally in the elevated and more arid regions. One species is 

 known only from Mexico, but not from the tropical portions. 



The genus Culiseta is more generalized than Culex or Aedes, as it partakes 

 of the characters of both the aedid and culicid stems. The species have been 

 generally regarded as allied to Culex, Dr. Felt even tracing analogies between 

 the genitalia. The larvae, however, show a greater affinity to A'edes, and this is 

 supported by the structure of the posterior tibial scrapers of the imago, which 

 are typically aedid. The eggs are laid in boat-shaped masses and the adults 

 hibernate, which are Culex characteristics. The tarsal claws of the female are 

 simple, as in Culex. those of the male have two teeth on one claw, as in some 

 species of A'edes. The palpi of the female retain the small terminal joint, as in 

 the aedid stem; it is generally lost in the culices. The genus is usually recog- 

 nizable by the venation, which is constant in most of the species, but in one 

 (inornatus Williston) there is some variation, especially in the males, whereby 

 the ordinary structure of the cross-veins appears, and individuals are liable to 



