ZENILLIA AND ALLIED GENERA — SELLERS 13 



Head with front of male 0.32 head width; frontal row of eight 

 bristles, extending from on a level with base of third antennal segment 

 to two reclinate preverticals; strong outer vertical bristle; facial ridge 

 bristly on lowest one-fourth ; gena one-fourth eye height ; frontal orbit 

 and face silvery pollinose; antenna black, third segment four times 

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

 mate segment short. 



Thorax black, gray-pollinose marked with four mesonotal vittae; 

 scutellum black, gray-pollinose with three pairs of marginal scutellars 

 and one nondecussate apical pair; three sternopleural macrochaetae; 

 midtibia with one inner ventral bristle ; hind tibia not ciliate. 



Abdomen black, silvery gray-pollinose; first segment, second and 

 third segments at apex, and fourth segment except at the sides shining 

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

 an encircling row of marginal macrochaetae; fourth segment with 

 irregular bristles mostly on apical half. 



Length 10 mm. 



Type locality. — Chilpancingo, Mexico. 



Distribution. — Texas 1, Mexico 1. 



Type.— Male, British Museum. Type of coquilletti. male, U.S.N.M. 

 No. 25702. 



Host. — Unknown. 



Remarks. — The writer had the privilege of examining the type 

 series of Exorista angustata in the British Museum. The description 

 was based on an examination of the type of angustata and the type of 

 coquilletti. The type of angustata had a pair of strong outer vertical 

 bristles; the palpi were strongly infuscated at the base with the tip 

 lighter. 



4. ZENILLIA EUCHAETIAE, new species 



ZenW.ia ceratomiae (Coquillett) Aldrioh and Webber (partim), Proc. TJ. S. 



Nat. Mus., vol. 63, art. 17, p. 41, 1924. 

 Zenillia ceratomiae Schaffnek and Griswold (nee Coquillett), U. S. Dept. Agr. 



Misc. Publ. 188, p. Ill, 1934. 



Male (type). — Head with front at narrowest 0.27 head width; 

 frontal row of nine bristles, extending from on a level with base of 

 third antennal segment to two reclinate preverticals; facial ridge 

 bristly on the lowest one-fifth ; gena one-sixth eye height ; paraf rontal 

 and face silvery white-pollinose ; antenna with first and second seg- 

 ments rufous, third black, third segment four and one-half times 

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

 segment short. 



Thorax black covered with heavy gray pollen marked with four 

 mesonotal vittae; scutellum black heavily covered with gray pollen, 

 with three pairs of marginal scutellars and one small decussate apical 



