76 MOSQUITOES OF NORTH AMERICA 



Obiginal Description of Wyeomyia ablechra: 



Female. Proboscis long and slender, dilated at the apex, black-scaled; palpi 

 Blender, black-scaled; occiput dark-scaled, with blue and green reflections, the 

 margin of the eyes dull whitish scaled, interrupted on each side below the vertex; 

 prothoracic lobes metallic violaceous, a large patch of silvery scales at the apex, 

 basal portion silvery-scaled; mesonotum dark-scaled, with faint bronzy and blue 

 reflections; abdomen dark-scaled above, with slight blue reflection, beneath white- 

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

 bronzy reflection; on the mid-legs the apical portion of the second tarsal joint and 

 all of the third, fourth, and fifth silvery white beneath; hind legs with a dash of 

 silvery white at the bases of all the tarsal joints beneath. Length, 3.5 mm. 



Eighteen specimens, Sonsonate, Salvador, August 16, 1905 (F. Knab). 



Type. Cat. No. 11385, U. S. N. M. 



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



Female. Proboscis rather long, tip somewhat expanded, labellge small, 

 rounded, with fine outstanding setse; vestiture bluish black, brighter bronzy 

 beneath. Palpi short, flattened, one-sixth as long as proboscis, bronzy black. 

 Antennae moderate, the joints slender, subequal, rugose, coarsely pilose, black; 

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

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

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

 bluish black. Occiput clothed with flat brown scales, with an iridescent reflec- 

 tion, a white line at margin of eyes, somewhat narrowed at vertex, a large white 

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

 margin of eyes. 



Prothoracic lobes elliptical, distinctly separated, clothed with flat, bronzy- vio- 

 laceous scales, the apices and bases silvery. Mesonotum clothed with elliptical, 

 flat dark-brown scales with a bronzy and blue reflection, the scales on front edge 

 and below the lateral angles whitish ; bristles over roots of wings brown. Scu- 

 tellum trilobate, with vestiture similar to and continuous with that of mes- 

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

 prominent, dark brown, with a broad, low median carina, 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 bronzy and blue 

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



Wings moderate, hyaline ; petiole of second marginal cell from one-fourth to 

 nearly one-half as long as its cell, that of second posterior cell about as long as 

 its cell ; basal cross-vein distant less than its own length from the anterior cross- 

 vein; scales of veins moderate, ligulate, black, broader and denser on apical part 

 of the wing, a slight bronzy reflection on costa. Halteres whitish, with large 

 black knobs. 



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

 beneath ; tibiae brassy beneath ; middle tarsi with apical half of the second and all 

 of last three joints silvery white on outer side; hind tarsi with a small white 

 mark at base of each joint beneath. Claw formula, 0.0-0.0-0.0. 



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



Mr. Knab captured adults as they came to bite in the daytime, in a shady lane 

 between plantations. 



Central America. 



Cacao, Trece Aguas, Alta Vera Paz, Guatemala, March 29, April 14 and 15, 

 1906 (Schwarz and Barber) ; Sonsonate, Salvador, August 19 and 30, 1905 

 (F. Knab) ; San Salvador, Salvador, August 16, 1905 (F. Knab). 



In our original description of this species we made an error of observation and 

 described the prothoracic lobes as " silvery white." We consequently failed to 



