30 PROCEEDINGS OF THE NATIONAL MUSEUM vol.93 



20. ZENILLIA ANGUSTIFRONS (TWnsend), new combination 



Chrysoexorista viridis angustifrons Townsend, Bull. Amer. Mus. Nat. Hist., vol. 



35, p. 21, 1916; Manual of myiology, pt. 4, p. 271, 1936. 

 Zoiultia marginata Ai.drich and Webbeb (partim), Proc. U. S. Nat. Mus., vol. 

 63 art. 17, pp. 17-18, 1924. 



Head with front of male at narrowest 0.29 head width; frontal row 

 of six bristles, extending from on a level below insertion of arista 

 to two reclinate preverticals ; no outer vertical bristle; facial ridge 

 bristly on lowest one-sixth; gena one-seventh eye height; antenna 

 black, second segment obscurely rufous, third segment six times the 

 length of second; arista thickened on basal one-third, penultimate 

 segment short ; palpus yellow. 



Thorax and scutellum heavy golden-brown pollinose; four meso- 

 notal vittae ; three pairs of marginal scutellars and one weak decussate 

 apical pair, one pair of discal scutellars; legs reddish brown; mid- 

 tibia with one median anterolateral bristle, one very weak inner 

 ventral bristle ; hind tibia ciliate, with one longer bristle ; wing with 

 two to three bristles at base of third vein. 



Abdomen black covered with golden-pollinose, some specimens 

 flecked with green; first segment, apical one-fourth to one-third of 

 segments 2 and 3, and tip of fourth segment shining black ; venter 

 gray-pollinose ; first and second segments with a pair and third and 

 fourth with a row of marginal macrochaetae ; second and third seg- 

 ments with a pair and fourth with a row of discal macrochaetae. 



Hypopygium, inner and outer forceps of about the same width and 

 length, narrow, tapering slightly, slightly concave. 



Paratype locality. — Nova Chapada, Brazil. 



Distribution. — Brazil 1, Bolivia 1. 



Paratype.— -Male, U.S.N.M. No. 20013. 



Host. — Unknown. 



Re/narks.— Description based on one male paratype (Williston) ; 

 one male labeled same as paratype; and seven males Rurrenabaque 

 Beni, Bolivia, 1921-22 (Mann). 



21. ZENILLIA OCHRACEA (Van der Wulp) 



Exorista ochracea Van der Wulp, Biologia Centrali-Americana, Diptera, vol. 2, 

 p. 63, 1890.— Van Leeuwen, U. S. Dept. Agr. Teehn. Bull. 90, p. 78, 1929. 



Ghryomasicera borealis Townsend, Journ. New York Ent. Soc, vol. 23, pp. 

 230-231, 1915 ; Manual of myiology, pt. 4, p. 112, 1936. 



ZeniUia <>chntc<<t (Van der Wulp) Aldbich and Webber, Proc. U. S. Nat. Mus., 

 vol. 63, art. 17, pp. 16-17, 1924. 



Head with front of male at narrowest 0.28 and of female 0.31 of 

 head width ; frontal row of eight bristles in male and six or seven in 

 female, extending from on a level below insertion of arista to two 

 reclinate preverticals in male and one in female; female only with 



