PSOROPHORA HORRIDUS 561 



PSOROPHORA HORRIDUS (Dyar & Knab). 



Janthinosoma lutzii Felt (not Theobald), Bull. 97, N. Y. State Mus., 471, pi. v, fig. 2, 



1904. 

 Janthinosoma lutzii Coquillett (in part), U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 17, 



1906. 

 Janthinosoma alMpes Theobald (in part), Mon. Culicid., iv, 157, 1907. 

 Aedes horridus Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 56, 1908. 

 Aedes horridus Thibault, Proc. Ent. Soc. Wash., xii, 18, 1910. 

 Janthinosoma alMpes Theobald (in part), Mon. Culic, v, 120, 1910. 

 Aedes horridus Theobald, Mon. Culic, v, 620, 1910. 



Obiqinai, Description of Aisdes horeidxjs : 



Proboscis and palpi clothed with violet-black scales; occiput whitish-scaled, with a 

 violet-black spot at the side; mesonotum broadly yellowish white-scaled at the sides, 

 a band of deep brown scales occupying about one-third of the width of the disk and 

 extending back to the antescutellar space, the lateral yellowish white scales sur- 

 rounding the antescutellar space behind; scutellum yellowish white-scaled; post- 

 scutellum densely yellowish white-scaled; abdomen above violet blue with lateral 

 apical yellowish spots on all but the last segments, beneath yellowish-scaled, the 

 seventh segment with basal violet scales, eighth segment entirely violet-scaled. 

 Legs deep violet-scaled, the basal two-thirds of the femora yellowish, the knees 

 silvery white, the hind legs with the scales on the tibiae and tarsi roughened, sub- 

 erect, the last two joints white. Length, 4.5 mm. 



Fifty-six specimens: Victoria, Texas, May 31 (W. E. Hinds); Cypress Bayou, 

 Texas, August 23, 1903 (J. D. Mitchell); Greenville, Texas, June 30, 1904 (H. S. 

 Barber); Dallas, Texas, June 28 (H. S. Barber); Dennison, Texas, June 24 (H. S. 

 Barber); Westpoint, Mississippi, August 11, 1904 (H. S. Barber); Corinth, Missis- 

 sippi, August 14 (H. S. Barber) ; Jackson, Mississippi, August 8, 1904 (H. S. Barber) ; 

 Vanburen, Arkansas, July 6, 1904 (H. S. Barber) ; Fort Smith, Arkansas, July 8 (H. 

 S. Barber) ; Little Rock, Arkansas, July 11, 1904 (H. S. Barber) ; Danville, Arkansas, 

 July 10 (H. S. Barber) ; Helena, Arkansas, July 30 (H. S. Barber) ; Chattanooga, 

 Tennessee, August 20, 1904 (H. S. Barber) ; Rives, Tennessee, July 27 (H. S. Barber) ; 

 Wister, Oklahoma, July 2 (H. S. Barber); Woodstock, Virginia, August 4, 1904 

 (F. C. Pratt) ; Plummer's Island, Maryland, July 18, 1904 (R. P. Currie). 



Type Cat. No. 11999, U. S. N. M. 



This species has been identified heretofore as Janthinosoma lutzii Theobald and 

 Janthinosoma albipes Theobald, but differs obviously from these more southern 

 forms. 



Description of Female and Egg of Psorophora horridus (Male and Larva Un- 

 known) : 



Female. Proboscis rather long and slender, unifonn, a little thickened 

 towards base, labellfe long and conical ; vestiture of dense blue-black scales and 

 very small yellowish setjE, those on labellse prominent, outstanding, black. 

 Palpi about one-fourth the length of proboscis, clothed with blue-black rough 

 scales and rather long black bristles. Antennae slender, rather long, segments 

 pilose, second segment slightly longer and stouter than succeeding one ; hairs of 

 whorls sparse and rather long ; tori globose, blackish, with a cup-shaped, luteous 

 apical depression, a patch of whitish scales on inner side. Clypeus promi- 

 nent, elliptical, nude, shining, brownish black. Eyes violet black. Occiput 

 densely clothed with very broad, curved yellowish-white scales, many long and 

 slender, pale, erect forked scales, densest on nape, a patch of flat violet black 

 ones at middle of each side ; coarse blackish bristles along margins of eyes, some 

 pale ones projecting at the vertex. 



Prothoracic lobes rather large, brown, sparsely clothed with broad, curved 

 whitish scales throughout and with numerous brown bristles. Mesonotum black, 

 with a broad median stripe uniformly clothed with narrow, brownish-black 

 scales and short black bristles; anterior edge narrowly and sides of disk 

 broadly clothed with large, very broad, nearly flat yellowish-white scales and 

 numerous rather short blackish bristles; at the sides of the ante-scutellar area 

 the scaling is densely yellowish white. Scutellum trilobate, brown, clothed 

 with flat yellowish-white scales, the lobes with black bristles. Postnotum ellip- 

 tical, prominent, nude, blackish brown with a slight pruinosity. Pleurae black- 



