314 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



XANTHOZONOPSIS, new genus. 



Genotype. — Xanthozonopsis vestita, new species. 



Differs from Xanthozona as follows : Male. No proclinate orbitals. 

 Vertex much less than one-third head- width. Second antennal joint 

 not so long; second aristal joint not elongate. Anal segment short, 

 thickly covered with fine appressed vestiture except the tip. No 

 discal macrochaetae on third abdominal segment, none on fourth 

 except fine marginal ones closely set amongst vestiture, four median 

 marginal on second segment, marginal row of heavy spines on third. 

 Abdomen not swollen, not so narrowed apically. Body proportion- 

 ately broader and head proportionately narrower. 



XANTHOZONOPSIS VESTITA, new species. 



Length of body, 14.5 mm, ; of wing, 12.5 mm. One male, Sapucay, 

 Paraguay, August 25, 1901 (W. T. Foster). 



Head yellowish; face and cheeks silvery, a very faint golden tinge 

 to the pollen of cheeks and parafacials; parafrontals shining blackish, 

 with a very thin coat of pollen. Frontaha brown, rufous anteriorly. 

 Antennae blackish. Thorax blackish, rather thinly poUinose; inner 

 vittae narrow, outer ones rather heavy. Scutellum and first abdom- 

 inal segment rich blackish-brown; the anal segment except tip, 

 and the posterior half of third segment, of same color; rest of abdo- 

 men deep yellow. The brown of third segment is pohshed, and its 

 front border is angular on median line. Venter concolorous with 

 tergum. Vestiture of anal segment black. Legs blackish, the tibiae 

 brownish. Wings lightly infuscate, a little darker at base; four to 

 six closely-placed bristles at base of third vein. Tegulae smoky- 

 blackish. 



Eolotype.—^o. 20042, U.S.N.M. 



PSEUDOSERVILLIA Townsend. 



Pseudoservillia Townsend, Ent. News, vol. 27, 1916, p. 178. 



Genotype. — Echinomyia jlavopilosa Bigot, 1888, Ann. Soc. Ent. 

 France (6), vol. 8, p. 80. 



Differs from Servillia as follows : Two f acio-orbital bristles present. 

 Head, thorax, abdomen, and legs densely yellow-pilose; the venter, 

 base, and tip of abdomen black-pilose in male. 



Brauer states that this is apparently same as Ech. rufoanalis Mac- 

 quart, but such is very doubtful. The two species are perhaps con- 

 generic. 



SERVILLIOPSIS, new genus. 



Genotype. — ServiUiopsis huccata, new species. 



Differs from Servillia as follows: Vertex less than one-third head- 

 width. Front, parafacials and cheeks without the very long hairs, 



