108 MOSQUITOES or NORTH AMERICA 



Legs rather long and slender, black with a bronzy reflection, femora whitish 

 beneath; tibiae brassy beneath; tarsi with a brighter bronzy shade beneath; 

 hind tarsi with basal three-fourths of fourth and basal third of fifth joints 

 silvery white beneath. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 3.5 mm. 



The adult was captured in a deep, heavily wooded ravine, in the daytime. 



Costa Eica. 



Esparta, September 18, 1905, a single captured female specimen (F. Knab). 



WYEOMYIA ESPARTANA Dyar & Knab. 



Wyeomyia espartana Dyar & Knab, Proc. Biol. Soc. Wash., xix, 140, 1906. 

 "Wyeomyia espartana Theobald, Mon. Cullc, v, 625, 1910. 



Geiginai. Dbscbiption op Wyeomyia espaetana: 



Prothoracic lobes dark centrally, the tips distinctly white. Similar to W. oehrura 

 Dyar & Knab, but the lobes are darker and more contrastingly colored, black cen- 

 trally with a distinct white tip. 



One specimen, Esparta, Costa Rica (F. Knab). 



Type.— Ca.t. No. 10,005, U. S. Nat. Mus. 



Description op Femat.k and Male op Wyeomyia espaetana (Laeva Unknown) : 



Female. — Proboscis rather short, tip expanded, labellse small, rounded, with 

 fine outstanding setse; vestiture bronzy black, with a brighter luster beneath. 

 Palpi short, flattened, one-sixth as long as proboscis, bronzy black, tips shining, 

 whitish. Antennae moderate, the joints slender, subequal, rugose, coarsely 

 pilose, black; tori subspherieal, with a cup-shaped apical excavation, yellowish 

 brown, with a whitish pruinosity; hairs of whorls long, rather sparse, black. 

 Clypeus rounded, convex, dark brown, whitish pruinose. Byes 'separated at 

 vertex by a narrow wedge, bluish black. Occiput clothed with flat brown 

 scales with a bronzy and blue reflection, a narrow whitish margin behind the 

 eyes, narrowed subdorsally, tending to form a spot at vertex, a large white spot 

 at lower part of sides; two long setae at vertex and a row of short ones along 

 margin of the eyes. 



Prothoracic lobes elliptical, distinctly separated, clothed with flat, blackish 

 submetallic scales, silvery white at base and tip. Mesonotum clothed with ellip- 

 tical, flat dark-brown scales with a bronzy and blue reflection; scales below 

 lateral angles whitish, a few scales on anterior margin also whitish; setae at 

 roots of wings brown. Scutellum trilobate, with vestiture similar to and con- 

 tinuous with that of mesonotum, each lobe with a small tuft of black bristles. 

 Postnotum elliptical, prominent, i^ath a broad, low median carina, dark brown, 

 a group of small setae near posterior margin. Pleurae 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 metallic reflec- 

 tion; venter yellowish white, colors separated at sides in a straight line, the 

 scales raised along mid-ventral line. 



Wings moderate, hyaline ; petiole of second marginal cell less than one-half 

 as long as its cell, that of second posterior cell nearly as long as its cell ; basal 

 cross-vein distant much less than its own length from anterior cross-vein; 

 scales of veins rather long, ligulate, shorter and denser apically, black, with a 

 slight bronzy reflection on costa. Halteres whitish with black knobs. 



Legs rather long, slender, black with a bronzy reflection, the femora whitish 

 beneath ; tibiae with a brassy luster beneath ; tarsi with a light bronzy luster 

 beneath, without white markings. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 3.8 mm. 



