WYEOMYIA GALOA 127 



narrow white border along margin of eyes ; two setae on the vertex, with shorter 

 ones along margins of eyes. 



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

 brown, a row of sets on anterior margin. Mesonotum clothed with elliptical, 

 flat dark-brown scales with a bronzy and blue reflection; scales on anterior 

 margin and lateral angles whitish ; bristles over roots of wings brown. Scutel- 

 lum trilobate, with vestiture similar to and continuous with that of mesonotum, 

 each lobe with a small tuft of black bristles. Postnotum elliptical, prominent, 

 weakly carinate, dark brovm, a group of small setae near posterior margin. 

 Pleurae dark brown, coxae luteous, clothed with elliptical, flat silvery-white scales. 



Abdomen subeylindrical, somewhat compressed, truncate apically and with 

 many long, dark-brown terminal setae; dorsal vestiture black, with a slight 

 metallic reflection; venter yellowish white, the colors separated at sides in a 

 straight line. 



Wings rather narrow, hyaline ; petiole of second marginal cell less than half 

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

 cross-vein distant its own length from anterior cross- vein; outstanding scales 

 of veins ligulate, becoming narrowly ovate and denser on forks of second and 

 fourth veins and outer half of third, black, with blue reflection on costa. 

 Halteres whitish with black knobs. 



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

 femora whitish beneath ; tibiae and tarsi with a strong luster beneath ; mid tarsi 

 with third and fourth joints silvery white on upper side; hind legs with last 

 two tarsal joints white beneath, except at their tips. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 3.3 mm. 



The adults were taken in a deep, shaded ravine, in the daytime, as they came 

 to bite. 



Costa Rica. 



Bsparta, September 18, 1905, adults captured (P. Knab) ; Zent, 20 miles 

 from Port Limon, September 26, 1905 (P. Knab). 



The species mentioned by Mr. Busck under this name will be found treated 

 here as Wyeomyia euethes, the determination originally given to Mr. Busck by 

 ourselves having been corrected on further study. 



WYEOMYIA GALOA Dyar & Knab. 



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

 Wyeomyia galoa Theobald, Mon. Culic, v, 624, 1910. 

 Obisinal Dbscbiption of Wyeomyia galoa: 



Prothoracic lobes entirely dark; head dark behind, the eyes with an even white 

 margin; feet all dark. 



3 specimens, Trece Aguas, Alta Vera Paz, Guatemala (Schwarz and Barber). 



Type— Cat. No. 10,001, U. S. Nat. Mus. 

 Desceiption or Female and Male of Wyeomyia oaloa (Labva 'Unknown) : 



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

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

 short, flattened, one-flfth as long as proboscis, bronzy black. Antennae mod- 

 erate, the joints slender, subequal, rugose, coarsely pilose, black; tori sub- 

 spherical, with a cup-shaped apical excavation, dark brown, with a whitish 

 pruinosity; hairs of the whorls long, rather sparse, black. Clypeus rounded, 

 convex, dark brown, pruinose. Eyes separated at the vertex by a narrow wedge, 

 bluish black. Occiput clothed with flat dark-brown scales with a metallic 

 reflection, a very narrow white border along the eyes joined to a white patch 

 below, two setae at the vertex and smaller ones along the eye margin. 



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

 with a dark-blue reflection; a row of setae on anterior margin. Mesonotum 



