ZENILLIA AND ALLIED GENERA — SELLERS 15 



Adults, June to September; number per host, one, sometimes two; 

 generations, one or two ; hibernation, in host pupa. 



5. ZENILLIA HYPHANTRIAE (Townsend), new combination 



Meigenia hyphantriae Townsend, Psyche, vol. 6, p. 17(5, 1891. 



Hyphantrophaga hyphantriae (Townsend) Townsend, Psyche, vol. 6, pp. 247-248, 

 1892; Manual of rnyiology, pt. 4, p. 249, 1936. — Gillette, Trans. Amer. Ent. 

 Soc, vol. 22, p. 75, 1895. — Baker, Ent. News, vol. 6, p. 174, 1895. — Coquillett, 

 U. S. Dept. Agi\, Div. Ent., Tech. Bull. 7, pp. 17, 91, 1897 ; Proc. U. S. Nat. 

 Mus., vol. 37, p. 554, 1910.— Geeene, Proc. U. S. Nat. Mus. vol. 60, art. 10, 

 p. 17, pi. 6, fig. 26 (puparium), 1922. — Essig, Insects of Western North Amer- 

 ica, p. 5S0, 1926. 



Exorista ceratomiae Coquillett, U. S. Dept. Agr., Div. Ent., Tech. Bull. 7, pp. 

 13, 101, 1897.— Reinhaed, Ent. News, vol. 32, p. 72, 1921— Luginbill, TJ. S. 

 Dept. Agr. Tech. Bull. 34, p. 81, 1928. (New synonymy.) 



Zenillia ceratomiae (Coquillett) Aldeich and Webber (partim), Proc. U. S. Nat. 

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



Didyma exigua Leiby (nee Van der Wulp) North Carolina Dept. Agr. Bull., 

 Feb. 1925, p. 18. 



Head with front of male at narrowest 0.27 to 0.30 and of female 

 0.32 to 0.33 of head width ; frontal row of six to eight bristles in male 

 and six to seven in female, extending from on a level with base of 

 third antennal segment to two reclinate pre verticals ; facial ridge 

 bristly on lowest one-third to two-fifths; gena one-sixth eye height; 

 paraf rontal and face silvery white pollinose ; antenna with third seg- 

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

 second; arista thickened on basal one-fourth, penultimate segment 

 short. 



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

 scutellum black, heavily covered with gray pollen, with three pairs 

 of marginal scutellars and one very small decussate apical pair turned 

 up, one pair of discal scutellars; three sternopleural macrochaetae; 

 legs reddish brown; midtibia with one median anterolateral bristle, 

 one inner ventral bristle ; hind tibia subciliate ; wing grayish hyaline, 

 third vein with two to three bristles at the base. 



Abdomen black, heavily covered with gray pollen, last three seg- 

 ments wholly gray-pollinose in female; first segment with a weak or 

 vestigial pair, second with a pair, and third with a row of marginal 

 macrochaetae; fourth segment with a row of discal macrochaetae, 

 tipped with marginal macrochaetae in female and marginal bristles 

 in male. 



Length 5.5 to 8 mm. 



Type locality. — Las Cruces, N. Mex. 



Distribution. — New Mexico 1, Texas 5, Oklahoma 1, Missouri 2, 

 Kansas 1, Florida 1. Published and unpublished records not dupli- 

 cated above: North Carolina (Leiby), Tennessee (Luginbill), Mis- 



