WYEOMYIA CANFIELDI 89 



Larva, Stage IV (plate 87, fig. 275). Hecad roimded, posterior angles slight; 

 antennse moderate, smooth, uniform ; dorsal head-hairs single. Lateral hairs of 

 abdomen multiple on first two segments, double on third, single on the rest. 

 Comb of eighth segment of about nine separate teeth in a single row. Air-tube 

 straight, slightly tapered, about six times as long as wide, a row of single hairs on 

 dorsal aspect, a few on posterior aspect, and a dense fringe of long, fine hairs 

 along ventral line nearly to tip; a few terminal hairs, the hooks stout. Anal 

 segment longer than wide, dorsal plate large ; dorsal tuft of three hairs on each 

 side, lateral hair single, subventral tuft of two long hairs and attached to dorsal 

 plate. Anal gills subequal, over twice as long as the segment. 



The larvae live in the fluid in the leaf -axils of Calladium and similar locations. 



Panama. 



Corozal, Canal Zone, November 30, 1907, larvse from Calladium leaf-axils in 

 a Chinaman's garden (A. H. Jennings) ; Gorgona, Canal Zone, February 7, 

 1908, larvge from "banana bromelia" near the Carabali River (A. H. Jen- 

 nings) ; Black Swamp, near Lion Hill, Canal Zone, July 28, 1908, larvge in a 

 liliaceous plant growing through the scum (A. H. Jennings) ; Tabernilla, Canal 

 Zone, February 4, 1909, larvae in flowers of Heliconia (L. Espey). 



WYEOMYIA CANFIELDI (Dyar & Knab). 



SahetJies canfieldi Dyar & Knab, Journ. N. Y. Ent. Soc, xv, 207, 1907. 



Sabethes canfieldi Busck, Smiths. Misc. Colls., quart, iss., lii, 71, 1908. 



Wyeomyia melanocephala Busck (not Dyar & Knab), Smiths. Misc. Colls., quart. 



iss., lii, 73, 1908. 

 Sabethes (?) canfieldi Theobald, Mon. Culic, v, 585, 622, 1910. 



Original Description of Sabethes canfieldi: 



$. Proboscis shorter than the body, strongly swollen at the apex, black; clypeus 

 prominent, smooth, shining black; tori of the antennae black with a whitish pubes- 

 cence; occiput clothed with flat dull metallic-green scales; prothoracic lobes approxi- 

 mated, clothed with brilliant blue and violet scales; mesonotum clothed with dark 

 greenish scales; scales of the scutellum metallic green and blue; metanotum deep 

 brown, with a number of long pale bristles; abdomen dark above, with greenish- 

 blue luster, silvery white beneath, separated on the sides in a perfectly straight 

 line; legs long and slender, without raised scales, black, with light bronzy reflec- 

 tions beneath in certain lights, the tarsi of the middle legs white on the second 

 to fifth joints, the white becoming obscure on the basal part of the second segment, 

 on the hind legs the last two joints white. Length, 3.5 mm. 



Twenty-three specimens. Lion Hill, Canal Zone, Panama (August Busck, col- 

 lector), all captured. 



Type. No. 10850, U. S. National Museum. 



Named, at the suggestion of Mr. Busck, in honor of Dr. Herman Canfield, Assistant 

 Chief Sanitary Inspector of the Canal Zone. 



Description of Female and Larva of Wyeomyia canfieldi (Male Unknown) : 



Female. Proboscis moderate, slightly swollen apically; vestiture black, 

 coarse ; labellge small, rounded with fine outstanding setae. Palpi short, one-fifth 

 as long as proboscis, slender, black, a tuft of outstanding hairs at base. Antennae 

 moderate, the joints subequal, rugose, coarsely pilose, black, the articulations 

 white; tori subspherical, with a cup-shaped apical excavation, dark brown, 

 whitish pruinose ; hairs of whorls long, moderately dense, black. Clypeus nar- 

 row, elliptical, convex, dark brown with a white pruinosity, nude. Eyes large, 

 separated at the vertex by a narrow wedge, black. Occiput clothed with flat, 

 dull metallic-green scales, silvery white on lower part of sides, two brown setse 

 at vertex. 



Prothoracic lobes large, approximate dorsally, clothed with metallic blue and 

 violaceous scales and bearing a dense row of black bristles. Mesonotum blackish 

 densely clothed with flat, bluish-black, narrowly ovate scales, with a green and 

 brown reflection, brighter posteriorly and over roots of wings. Scutellum trilob- 



