1000 MOSQUITOES OF NOETH AMEEICA 



beyond them ; a group of four fflaments before tip ; an outer row of cilia ; six 

 serrate filaments on outer margin; dentition of two small teeth followed 

 by a large one which is roundedly serrate on its lower declivity; a long 

 row of confluent spines; two broad serrate filaments within; basal angle 

 rounded, with a small tuft; a row of long basal hairs. Maxilla narrowly quad- 

 rangular, slightly excavate on outer margin; all the margin and inner area 

 densely hairy; a pair of small filaments on inner third; palpus rather large, 

 conical, a large dendritic tuft without, a terminal group of digits and flattened 

 appendages. Thorax subquadrate, about as wide as long; hairs short, con- 

 sisting of branched hairs, single hairs and tufts; metathorax sparsely haired. 

 Abdomen stout, the anterior segments shorter ; long feathered lateral hairs on 

 first three segments, double on first and second, single on third; posterior hairs 

 small, smooth; a dorsal series of five pairs of fan-shaped tufts on third to 

 seventh segments (plate 130, fig. 456). Air-tube sessile, subquadrate, 

 roundedly angled posteriorly. Lateral plates of eighth segment with a series of 

 spines posteriorly, seven or eight long ones alternating with six or seven short 

 ones which are about one-fourth as long as the long ones. Anal segment about as 

 long as wide, with a small dorsal plate; dorsal brush a long hair and a short 

 tuft on each side ; a single long lateral hair below the plate ; ventral brush well 

 developed, of long branched tufts ; anal gUls moderate, about as long as the seg- 

 ment, bluntly pointed. 



Mr. KJnab found the larvae in pools in a river-bed in a deep ravine. The water 

 was clear and surrounded by large boulders. They were associated with Gulex 

 pinarocampa, Gulex derivator, and Aedes cuneatus. 



Tropical Mexico. 



C6rdoba, June 13, 1905, and January 22, 1908 (F. Knab). 



ANOPHELES MALEFACTOR Dyar & Knab. 



Anopheles malefactor Dyar & Knab, Journ. N. Y. Ent. See, xv, 198, 1907. 



Anopheles malefactor Busck, Smiths. Misc. Colls., quart, iss., Ill, 59, 1908. 



Anopheles malefactor Theobald, Men. Culic, v, 87, 1910. 



Anopheles malefactor Darling, Stud. Rel. Malaria, Isthm. Canal Comm., 9, 1910. 



Anopheles malefactor Jennings, Journ. Econ. Ent., v, 134, 1912. 



Anopheles malefactor Knab, Amer. Journ. Trop. Dis. & Prev. Med., 1, 36, 41, 1913. 



Obioinal Description of Anopheles mauefactoe: 



5. — Palpi long, clothed with brown scales and black outstanding ones, which are 

 grouped more or less in tufts, heaviest on the basal portion, a slight sprinkling of 

 lighter scales among the brown ones, particularly at the bases of the dark tufts; 

 occiput black-scaled, the eyes margined with white above and where they join is a 

 tuft of white hairs; mesonotum gray with reddish and bluish tinge and small dark 

 freckles tending to form longitudinal rows, sparsely distributed narrow yellowish 

 scales, a black spot at the base extending over the middle of the scutellum and two 

 small sub-lateral black spots medially, all three of these show a lighter margin; 

 abdomen slender, gray, with lateral tufts of outstanding black scales at the apices 

 of the segments; legs with the femora and tibiae black freckled with white, on the 

 hind tibiae yellow scales predominate; tarsi black, ringed with yellowish white; 

 on the hind legs the first tarsal joint is dark at the base, light at the apex and has 

 six white rings of different lengths, second joint narrowly white at base, broadly so at 

 apex, with a moderately broad white ring near the middle and another narrower one 

 between it and the base, third and fourth joints white ringed at base and apex with a 

 broad central white ring, apical segment entirely whitish scaled; wing spotted, black 

 and white, a large black patch margined with white on the costa near the middle, 

 more basally a smaller costal patch and towards the apex another large one, all 

 margined with white, scaling of the veins In patches of black and white scales, the 

 third vein with a small, black spot at the base, the sixth vein with many black dots 

 and dashes. Length, 4.5 mm. 



(J. — Palpi with the apical portion clubbed, clothed with yellow scales with golden 

 luster, a narrow dark ring at the middle of the club, the shaft ringed with dull 

 ochreous at the apex and at the constriction and broadly marked with the same 

 color on the apical portion; antennae pale brown and ferruginous with silky luster. 

 Length, 4.5 mm. 



Seven specimens, Chagres River, Panama (August Busck, collector) ; Tabernilla, 

 Canal Zone, Panama (August Busck, collector) ; Gatun, Canal Zone, Panama (A. H. 

 Jennings, collector). 



