ZENILLIA AND ALLIED GENERA — SELLERS 107 



height ; frontal orbit and face golden-pollinose, lower side of face and 

 gena more silvery; antenna black; arista thickened on basal two- 

 fifths, penultimate segment longer than broad; palpus yellow, base 

 infuscated. 



Thorax black, sides silvery gray pollinose, dorsum golden pollinose ; 

 four black mesonotal vittae; four postsutural dorsocentral macro- 

 chaetae; scutellum with three pairs of marginal scutellars and one 

 weak decussate apical pair turned upward, one pair of discal scutel- 

 lars; three sternopleural macrochaetae ; midtibia with one strong 

 median anterolateral bristle, one strong inner ventral bristle; hind 

 tibia ciliate, with one longer bristle; pulvilli short; wing with three 

 bristles at base of third vein. 



Abdomen black, venter of segments one, two, and three silvery 

 gray pollinose; basal two-thirds of segments 2, 3, and 4 golden pol- 

 linose tinged with green, no dorsal vitta; dorsum of first segment 

 shining black, apical margins of other segments shining brownish 

 black; first and second segments with a pair and third segment with 

 a row of marginal macrochaetae; second and third segments with a 

 pair of discal macrochaetae; fourth segment irregularly tipped with 

 bristles. 



Length 9 mm. 



Type locality. — Brazil. 



Type.— -Male, U.S.N.M. No. 54140. 



Host. — Unknown. 



Remarks. — Described from the type specimen, which was previous- 

 ly Chrysoexorista viridis Townsend, male allotype U.S.N.M. No. 

 19611. " 



The genitalia are similar to those of Zenillia angustifrons which 

 Townsend designated as subspecies of Chrysoexorista viridis. Z. 

 angustifrons possesses more Zenillia-like characteristics than the 

 male described above. 



8. ANGUSTIA, new genus 



The genus August la should be associated with the genus Aplomya. 

 Angustia, however, has only two sternopleural bristles, the frontal 

 bristles descend to the middle of the second antennal segment, and 

 the fourth segment of the abdomen is destitute of macrochaetae. The 

 thorax and abdomen are wholly golden pollinose. 



1. ANGUSTIA ANGUSTIVITTA (Aldrich and Webber) (genotype) 



Zenillia angustivitta Aldrich and Webber, Proc. U. S. Nat. Mas., veil. 03, art. 

 17, p. 18, 1924. 



Head with front at narrowest 0.28 head width ; frontal row of four 

 bristles, extending from middle of second antennal segment to two 



