70 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



second and all of the succeeding joints, silvery white-marked beneath. 

 Length, 3.5 mm. 



Two specimens, Sonsonate, Salvador, August 30, 1905. (F. Knab.) 



Type.— Cat. No. 11993, U.S.N.M. 



The prothoracic lobes in certain lights have a shining appearance 

 at their apices, but do not seem to be clothed with differently colored 

 scales from those of the general surfaces of the lobes. 



WYEOMYIA MATffiA, new species. 



Female. — Proboscis long and slender, swollen at the apex, dark- 

 scaled, with a line of whitish scales on the under surface; palpi dark- 

 scaled; occiput dark-scaled, with faint bluish and bronzy reflections. 

 the margin of the eyes dull white-scaled, interrupted on each side of 

 the vertex; prothoracic lobes dark blue and violaceous, with strong 

 iridescence; mesonotum dark bronzy brown-scaled; abdomen above 

 blackish brown-scaled, with obscure bronzy and blue reflections, be- 

 neath coarsely white-scaled, the colors separated on the sides in a 

 straight. line;Tegs dark-scaled, with bronzy and blue reflection, the 

 under surfaces of the femora and tibia' pale brassy-scaled; mid-legs 

 with the apical half of the second joint and all of the third, fourth, 

 and fifth silvery white-marked on one side: front and hind tarsi 

 unmarked. Length, 3.5 mm. 



Two specimens, Sonsonate. Salvador, August 19, 1005, and Santa 

 Lucrecia, State of Vera Cruz, Mexico, dune 21, 1905. (F. Knab.) 



Type.— Cat. No. 11994, U-.S.N.M. 



WYEOMYIA ARGYRURA, new species. 



Female. — Proboscis moderate, swollen at the tip, black-scaled; 

 occiput dark-scaled with iridescent reflections, a diffuse silvery spot 

 at the vertex, sides of the head white-scales, running up part way 

 along the ocular margin; prothoracic lobes entirely silvery-scaled; 

 mesonotum dark bronzy brown-scaled: abdomen black-scaled above 

 with bluish reflection, the tip silver-scaled; beneath silvery-scaled, 

 the colors separated on the sides in a straight line. Legs deep brown- 

 scaled with bluish and bronzy reflections, femora and tibia 1 white 

 beneath as also the front tarsi, the white broader and more distinct 

 on the third joint; on the hind legs all the tarsal joints have silvery 

 white basal marks beneath, which extend well towards the apex: 

 mid tarsi with the apex of the second, and all of the succeeding joints 

 silver white-scaled above and beneath. Length. '2.5 mm. 



One specimen, San Antonio de los Bahos. Cuba (J. H. Pazos). 



Type.— Cat. No. 12009, U.S.N.M. 



Nearest to W. sororcula Dyar and Knab, but distinguished by the 

 silvery tip of the abdomen. 



