ANOPHELES WALKERI 1033 



blackish, the ocular margin and a pair of large transverse spots on the vertex 

 whitish pruinose ; clothed vi^ith erect triangular or notched scales, black through- 

 out, a tuft of brown hairs projecting forward between the eyes ; a row of setae 

 along margins of eyes. 



Prothoracic lobes lateral, small but prominent, bearing many black bristles. 

 Mesonotum narrow, elongate, deep brown, black in a broad median stripe on 

 anterior half and on the lateral areas of posterior half, slightly gray pruinose 

 in two narrow stripes on anterior half and a very broad median stripe on posterior 

 half ; vestiture of short brown hair-like scales densest on the disk, some black 

 bristles on the sides. Scutellum collar-like, dark brown, with a marginal row 

 of long blackish bristles. Postnotum elliptical, prominent, nude, dark brown, 

 slightly pruinose. Pleurae and coxae blackish brown, pruinose, with a few short 

 hairs. 



Abdomen subcylindrical, somewhat depressed, truncate at tip, blackish, 

 rugose ; vestiture of numerous short black hairs. 



Wings (plate 41, fig. 22) moderate, slightly smoky ; petiole of second marginal 

 cell much shorter than its cell, that of second posterior cell slightly longer than 

 its cell ; basal cross-vein distant about its own length from anterior cross-vein ; 

 scales of veins broadly linear, brownish black, rather dense and uniformly dis- 

 tributed, only very slightly denser at the bases of the fork-cells, not forming 

 distinct spottings. Halteres with pale stem and black knob. 



Legs long and slender, vestiture black with a bluish reflection. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 4.5 mm. ; wing 3.5 mm. 



Life history and habits unknown. 



Southern Florida. 



Florida Keys (H. Byrd) . 



Anopheles atropos is remarkable for the general blackish coloration, involv- 

 ing even the scales of the head and mesonotum. It suggests A. walheri by the 

 uniform scaling of the wings and the palpal rings, which latter, however, are 

 much less distinct than in walJceri. We have only the original series, the species 

 being evidently very restricted in distribution. 



ANOPHELES WALKERI Theobald. 



Anopheles walkeri Theobald, Men. Culicid., i, 299, 1901. 



Anopheles species Beyer, N. Orleans Med. & Surg. Journ., llv, 148, 1901. 



Anopheles walkeri Giles, Handb. Gnats or Mosq., 2 ed., 329, 1902. 



Anopheles bifurcatus Theobald (in part, not Linnagus), Men. Culic, iii, 19, 1903. 



Anopheles bifurcatus Giles (in part, not Linnasus), Rev. Anophelinae, 23, 1904. 



Anopheles walkeri Blanchard, Les Moustiques, 167, 1905. 



Anopheles bifurcatus Theobald (in part, not Linnaeus), Mon. Culic, iv, 36, 1907. 



Anopheles walkeri Thibault, Proc. Eat. Soc. Wash., xii, 22, 1910. 



Anopheles bifurcatus Theobald (in part, not Linnaeus), Mon. Culic, v, 11, 1910. 



Anopheles walkeri Knab, Amer. Journ. Trop. Dis. & Prev. Med., i, 36, 1913. 



Original Description of Anopheles walkeri: 



Head with a patch of thin yellow curved scales in front and thin upright black 

 ones on the occiput and sides. Thorax deep brown, with numerous curved hair-like 

 golden scales. Abdomen dark brown to black with dense golden pubescence. Legs 

 unhanded, brown. Wings unspotted, much as in A. bifurcatus, but the cross-veins 

 differently disposed. 



$. Head greyish-brown, with a patch of yellow curved scales in front ending in 

 a tuft of yellow hairs between the eyes; behind are long upright black scales with 

 grey tips, a broadish, central, bare line separating the scales into two portions: 

 eyes purplish-brown with a hoary white border, most distinct at the sides; antennae 

 dark brown, greyish pubescence and black hairs, the first few joints have creamy 

 scales, basal joint round and dark with a few pale scales; proboscis dark brown with 

 some ochraceous reflections a little longer than the palpi; palpi dark brown with 

 ochraceous reflections paler at the tips of the joints and at the apex, thickly scaled 

 along the base; clypeus brown. 



Thorax brown when viewed facing strong light, greyish-brown when pointing 

 away from it, with four grey stripes, very clear in some lights on the denuded 



66 



