568 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



Tribe MACQUAHTHNI. 

 MATUCANIA, new genus. 



Genotype. — Matucania mellisquama, new species. 



Clypeus gently sunken. Epistoma very short, not warped. 

 Facialia ciliate less than one-third way. Proboscis very short; palpi 

 stout, long, bowed. Third antennal joint about three times second 

 in male. Arista longer than antennae, thin, bare. Eyes thickly 

 very long-pilose. Male vertex not one-fourth head width. Frontals 

 stopping near base of antennae. Ocellars present. Parafacialia 

 bare. Cheeks about two-fifths eye length. Two preacrostichals 

 and lateral scutellars; three sternopleurals, postintraalars, and post- 

 suturals; two or three postacrostichals ; rather long slender strongly 

 decussate apical scutellar pair. Third vein bristled only at base; 

 others bare. Apical cell open considerably before tip. Hind cross- 

 vein nearer to cubitus. Male claws long; median marginal pair on 

 first two segments; median discal pair on intermediate segments; 

 marginal row on last two segments ; discal row on anal. 



MATUCANU MELLISQUAMA, new species. 



Length, 7.5 to 8 mm. Two males, Matucana, Peru, 8,000 feet, 

 January 30, 1913, and May 1, 1914 (C. H. T. Townsend). 



Black, rather shining, with faint metallic bluish reflection, thinly 

 silvery. Antennae black. Fontalia brown. Palpi fulvous. Rest 

 of head silvery. Pollen thicker on front and lateral edges of thorax, 

 and on pleura; four black vittae, the inner narrow, the outer blotch- 

 like and ill-defined. Abdomen silvery on bases of segments laterally, 

 the disks of first three segments showing triangular areas of rusty 

 pollen in oblique view. Hind tibiae rather rufous or fulvous, the 

 others less so. Wings faintly smoky-yellowish, more so costally. 

 Tegulae honey-colored. 



Type.—Cni. No. 22250, U.S.N.M. 



LEPTOMACQUARTIA, new genus. 



Genotype. — Leptomacquartia planifrons, new species. 



Clypeus flush. Epistoma very short, little warped. Facialia 

 finely ciliate about halfway. Proboscis about two-thirds head 

 height; palpi long, slender, crooked. Third antennal joint about 

 twice second in male. Arista microscopically pubescent basally. 

 Eyes nearly bare. Front of male much flattened, vertex not over 

 one-tenth head width. One frontal below base of antennae. Oscel- 

 lars present. Two sternopleurals, postintraalars and lateral scutel- 

 lars; three postsuturals; one or two preacrostichals; postacrostichals 

 at most very weak; short decussate apical scutellar pair. Third 

 vein bristled only at base; others bare. Apical cell open a little 



