416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



NEOMETACHAETA POLITA, new species. 



Length of body, 4.5 mm.; of wing, 3 mm. One male, Chosica 

 Canyon, above Chosica, Peru, about 4,000 feet, April 4, 1913, on 

 ground (Townsend) . 



Whole head silvery- white, including occiput. Frontaha velvet- 

 brown. Palpi and second antennal joint rufous, rest of antennae 

 blackish. Thorax and scutellum silvery-white, with two broad pol- 

 ished black vittae which extend on sides of scutellum. Abdomen 

 poHshed black, with three narrow equal silvery-white fasciae of poUen 

 on bases of second to fourth segments. Venter and femora thinly 

 silvery, rest of legs blackish. Wings clear, deeply smoky-blackish on 

 humeral, costal, subcostal and marginal cells. Tegulae pure white. 



Holotype.— Cat. No. 19437, U.S.N.M. TD 4143. 



PSEUDEUANTHA, new genus. 



Genotype. — Pseudcuantha linellii, new species. 



Differs from EuantJia as follows: Arista bare, longer. No distinct 

 facial carina. Eyes of female quite thickly hairy. Second antennal 

 joint elongate, third joint about twice as long. Vibrissae on oral 

 margin. Front tarsi of female like the others, not thickened or com- 

 pressed. No costal spine, apical cell more attenuate distally, cubitus 

 a little nearer hind margin of wing. 



This genus was labeled many years ago by Mr. Martin L. Linell, aid, 

 department of insects. United States National Museum, as Pseud- 

 euantha, a manuscript name. Linell' s name is adopted and the 

 species is named for him in recognition of his fine sense of discrimina- 

 tion and just concepts of muscoid genera, as shown by the unpublished 

 determinations of United States National Museum material made 

 by him in this group. 



PSEUDEUANTHA LINELLII, new species. 



Length of body, 12 mm.; of wing, 9.5 mm. One female, Tehuan- 

 tepec (Sumichrast) . 



Black, with silvery pollen. Entire head pollinose except the 

 blackish frontaha and antennae; palpi rufous, with fulvous tips. 

 Thorax, scutellum, and pleurae polhnose; two narrow black vittae 

 in middle of mesoscutum before suture, and two heavier ones on each 

 side continued indistinctly behind suture. Second and third abdom- 

 inal segments broadly poUinose on base, except in middle, where the 

 pollenband fades or narrows, the pollen similarly continuing on venter. 

 Front femora silvery on the outside. Wings deeply yellow on obhque 

 antero-basal area, taking up a little less space than the large deeply 

 smoky area extending from fifth vein obliquely to costa and wing tip; 

 the veins in the yellow area are yellowish, but change to brown in the 

 smoky area; anal area behind fifth vein subhyaline. Tegulae white. 



Holotype.— Cat. No. 19438, U.S.N.M. 



