712 MOSQUITOES OF NORTH AMERICA 



by hairs at base, two rows of cilia within ; a tuft of long hairs at tip ; outer half 

 with two filaments near apex, a long spine close to the apical tuft and a short 

 one below on the margin; surface covered with long hairs; palpus moderate, 

 rounded, with four small irregular apical digits. Thorax transverse, rounded ; 

 hairs abundant but rather short, the prothoracic subdorsal ones in twos. Skin 

 smooth. Abdomen rather long; hairs moderately developed, the laterals in 

 twos on segments three to six, the subdorsal ones simple and rather long on seg- 

 ments four and five. Tracheas broad. Lateral comb of eighth segment of many 

 scales in a patch. Air-tube rather slender, about four times as long as wide, 

 tapered outwardly ; pecten reaching beyond basal third, of evenly spaced teeth, 

 a small tuft beyond, near middle. Anal segment longer than wide, the dorsal 

 plate reaching half-way down the sides, its lateral margins excised ; dorsal hairs 

 a long hair and a tuft on each side; lateral hair small, single. Ventral brush 

 well-developed, the barred area preceded by a series of smaller tufts. Anal gills 

 longer than segment, tapered. 



Egg (plate 147, fig. 683). Fusiform, slightly flattened on one side, the 

 sculpture of hexagonal reticulations elongated lengthwise, black, a gelatinous 

 cushion at the micropylar end. 



The eggs are laid separately. The species apparently has but a single brood, 

 the larvae appearing in the spring in transient puddles. Professor Smith's 

 experience with this species in New Jersey, known to him at the time as Culex 

 sqiMmiger, is as follows : 



" Full-grown larvae were found by Mr. Grossbeck, April, 1903, near Paterson, 

 with canadensis. The larvae were recognized as distinct, but were not bred. 

 April 25th, Mr. Van Duersen brought in four well grown larvae from swampy 

 woods near New Brunswick ; but these also failed to develop. May 2d, another 

 lot of mixed larvae was brought in, mostly canadensis. Pupation began May 3d, 

 and a male squamiger emerged May 8th, though possibly not from the first pupa. 

 Additional collections were made May 16th, mostly pupae and mostly canadensis ; 

 but in two days fourteen specimens, nearly equally divided as to sex, were bred 

 out. Though this territory was collected over many times later in the season 

 and several other species were found, no further trace of squamiger appeared. 

 It is probable, therefore, that only one brood occurs, and that very early in the 

 season. Nothing is known of the egg-laying habits nor of the method of hiber- 

 nation, but from their early date of appearance and their constant association 

 with canadensis, it is probable that the eggs winter like and with those of its 

 associate." 



Professor Smith further remarks that the period through which the female 

 images have been found indicates an individual life of about three months. The 

 species is rare. 



Eastern United States from New Jersey to Mississippi. 



New Brunswick, New Jersey, May 17 (J. A. Grossbeck) ; Livingston Park, 

 New Jersey, May 5 (J. A. Grossbeck) ; Elizabeth, New Jersey, May 28, 1906 

 (D. S, Carmody) ; Baltimore, Maryland (T. H. Coffin) ; Grassymead, Virginia, 

 June 19, 1906 (F. Knab) ; Natchez, Mississippi, April, 1903 (A. Fleming). 



Aedes grossheclci was for some time considered identical with A. squamiger of 

 the Pacific Coast. It is however abundantly distinct in coloration of the imago, 

 structure of the male genitalia and larva, and in habits. Professor Smith, in 

 figuring the male claws, shows two teeth on one of the front claws ; in our only 

 male specimen, a cotype of sylvicola, all the claws are armed with but a single 

 tooth. 



AEDES RIPARIUS Dyar & Knab. 



Aedes riparius Dyar & Knab, Journ. N. Y. Ent. Soc, xv, 213, 1907. 

 Aedes riparius Gibson (in part), Rept. Ent. Soc. Ontario, 1908, 109, 1909. 

 Aedes riparius Theobald, Mon. Culic. v. 485. 1910. 



