ZENILLIA AND ALLIED GENERA — SELLERS 77 



Exorista chrysopham Townsend. Ent. News, vol. 2, p. 197, 1891. 



Exorista con finis of authors (nee Fallen) Coquiixett, U. S. Dept. Agr., Div. Ent., 

 Tech. Bull. 7, p. 97, 1897. — Smith, Catalogue of New Jersey insects, p. 780, 

 1909— Reinhard, Ent. News, vol. 32, p. 72, 1921.— Greene, Proe. U. S. Nat 

 Mus,, vol. 00, art. 10, p. 11, fig. 21 (puparium), 1922. 



Zemllia confinis <>f authors (nee Fallen) Aldrich and Webber, Proe. U. S. Nat. 

 Mus., vol. 03, pp. 35-36, 1924. — Johnson, List of New England Diptera, p. 1!>7. 

 1925; Proe. Boston Soc. Nat. Hist., vol. 38, p. 87, 1925; Biological survey of 

 Mount Desert, The insect fauna, pt. 1, p. 201, 1927. — Essig, Insects of western 

 North America, p. 581, 1926. — West, Cornell Univ. Agr. Exp. Stat. Mem. 101, 

 p. S14, 1928.— Reinhard, Texas Agr. Exp. Stat. Bull. 101, pp. 33-34, 1929.— 

 Aldmch, Proe. U. S. Nat. Mus., vol. 80, art. 20, p. 2, 1932. 



Head with front of male at narrowest 0.25 to 0.28 (in five speci- 

 mens) and in female 0.31 to 0.33 (in five specimens) of head width; 

 frontal row of six to eight bristles in male and five to six in female, 

 extending from on a level with well below arista to two reclinate 

 preverticals; male with very weak and female with outer vertical 

 bristle; facial ridge bristly on lowest one-third in male, one-fonrth 

 in female; gena one-fifth to one-sixth eye height, silver-gray; para- 

 frontal and face silvery pollinose; antenna black, third segment in 

 male four and one-half and in female three times length of second; 

 arista thickened on basal one-half, penultimate segment elongate; 

 palpus black, rarely partially yellow. 



Thorax black, thinly gray pollinose in male, more noticeably polli- 

 nose in female; marked with five mesonotal vittae; midtibia usually 

 with three median anterolateral bristles, the middle bristle longest, 

 the lower one shortest, often very small in male; hind tibia subciliate; 

 wing grayish hyaline, third vein w 7 ith two bristles at base; squamae 

 whitish. 



Abdomen black and shining; first segment shining black; in male 

 often obscurely rufous at the sides of second and third segments, 

 second thinly gray pollinose with only a narrow hind margin and 

 dorsal vitta black, third and fourth segments polished black with only 

 a very narrow, interrupted silvery band at extreme base of third ; in 

 female, second segment with broader black hind margin and with 

 pollinose band on third segment as broad as that on second, fourth 

 segment wholly polished black except extreme base laterally; first 

 segment with a pair, second often with four, and third with a row 

 of marginal macrochaetae; no discal macrochaetae ; fourth segment 

 irregularly covered with bristles; abdominal hairs erect. 



Hypopygium black, inner forceps shorter than outer, a few fine 

 hairs on outer side, in profile decidedly concave on hind edge ; outer 

 forceps nearly straight, ending in a blunt point. 



Length 5 to 8 mm. 



Type locality. — Unknown. 



