WYEOMYIA CIRCUMCINCTA 151 



Original Description of Wyeomyia andropus: 



Female. Proboscis rather short and stout, swollen toward the apex, black- 

 scaled; palpi black-scaled; occiput dark-scaled, with greenish and brownish reflec- 

 tions, the eyes not distinctly white-margined above, the marginal scales being of a 

 grayish cast; prothoracic lobes dark-scaled, with greenish and bronzy luster and 

 without pale scales on the apices; mesonotum dull brown-scaled, with obscure 

 bronzy and bluish luster; abdomen dark-scaled above, nearly black, beneath yel- 

 lowish white-scaled, the colors separated on the sides in a straight line; legs dark- 

 scaled, with bronzy and bluish reflections, without white markings on the tarsi. 

 Length, 3 mm. 



Male. The proboscis somewhat longer and more slender than in the female, 

 abdomen expanded toward the tip, the claspers widely separated and conspicuous; 

 fore tibiae and tarsi silvery yellowish-scaled beneath, the color whitest and most 

 conspicuous on the second, third, and fourth joints; mid-legs, with the tibia, the 

 basal half of the first tarsal joint silvery white marked beneath, the apical half of 

 the second joint and all of the succeeding joints silvery white marked above and 

 beneath; hind legs entirely dark. 



Twenty-six specimens, Porto Bello. Fort San Felipe, and Caldera Island, Porto 

 Bello Bay, Panama, bred from larvae in water between the leaves of bromeliaceous 

 plants. (A. H. Jennings.) 



Type.CsLt. No. 11989, U. S. N. M. 



Description of Female, Male, Larva, and Pupa of Wyeomyia circumcincta: 



Female. Proboscis moderate, swollen apically, vestiture black with a bronzy 

 and blue reflection; labellse small, rounded, with fine outstanding setae. Palpi 

 short, flattened, one-sixth as long as proboscis, bronzy black. Antennas moder- 

 ate, the joints slender, subequal, rugose, coarsely pilose, black; tori subspheri- 

 cal, with a cup-shaped apical excavation, blackish, with a slight pruinosity; 

 hairs of the whorls long, rather sparse, black. Clypeus rounded, convex, blackish 

 pruinose. Eyes separated at the vertex by a narrow wedge, bluish black. Occi- 

 put clothed with flat dark-brown scales with a metallic reflection, a white patch 

 below ; two long hairs at the vertex and smaller ones along margin of eyes. 



Prothoracic lobes large, elliptical, well separated, clothed with flat scales, 

 dark brown like mesonotum, with a row of setae on anterior margin. Mesonotum 

 clothed with elliptical, flat dark-brown scales with a submetallic reflection; 

 scales on anterior margin and lateral angles whitish ; bristles over roots of wings 

 dark brown. Scutellum trilobate, with vestiture similar to and continuous with 

 that of mesonotum, each lobe with a small tuft of dark-brown bristles. Post- 

 notum elliptical, prominent, with an obscure median carina, dark brown, a 

 group of small setas near posterior margin. Pleurae dark brown, coxae luteous, 

 clothed with elliptical, flat silvery-white scales. 



Abdomen subcylindrical, compressed, truncate apically, and with many long, 

 dark-brown terminal setae ; dorsal vestiture black with a slight bronzy and blue 

 reflection ; venter yellowish white, colors separated at sides in a straight line. 



Wings moderate, hyaline ; petiole of second marginal cell one-third as long 

 as its cell, that of second posterior cell shorter than its cell ; basal cross-vein 

 distant more than its own length from anterior cross-vein ; scales of veins ovate, 

 blunt at tip, black, with a blue and bronzy reflection on the costa, broader and 

 denser on tip of wing. Hal teres whitish with black knobs. 



Legs rather long and slender, black, with bronzy and blue reflection, femora 

 whitish beneath ; tibiae and tarsi with pale-brassy luster beneath. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 2.8 mm. ; wing 2.7 mm. 



Male. Proboscis more slender than in the female, with a bronzy luster be- 

 neath. Palpi very small. Antenna similar to those of the female, hairs of whorls 

 longer and more abundant, a small secondary subapical whorl on each joint. 

 Coloration of head and body as in the female. Abdomen rather slender, ex- 

 panded towards tip, claspers long and prominent, widely separated. Wing 

 hardly narrower than in the female, venation and vestiture much the same. 

 Front legs with a strong brassy luster beneath, becoming almost silvery and 



