AET. 17. NORTH AMERICAN PHOROCERA ALDRICH AND WEBBER. 21 



larger bristle about middle. Wings subhyaline, fourth vein ob- 

 liquely curved without fold, ending considerably before apex ; third 

 vein with one or two setules at base. 



Length 10 to 10.5 mm. 



Described from three males ; one Holland Hills, Long Island, New 

 York, emerged from puparium June 4, 1911; one Pennyquid Bar- 

 rens, New York, July 8, 1920 (American Museum of Natural His- 

 tory) ; one Germantown, Pennsylvania (Harbeck), September 24, 

 1905. 



Type.—M2L\Q, Cat. No. 25703, U.S.N.M., from Holland Hills, New 

 York. 



The type has the puparium attached, which is identical with that 

 of lobeliae^ as figured by Greene.^ The latter, however, is a much 

 smaller species with depressed hair on the second and third ab- 

 dominal segments. 



ZENILLIA EUDRYAE Townsend. 



Exorista eudryae Townsend, Trans. Amer. Ent. Soc, vol. 19, 1892, p. 287. — 

 CoQuiLLETT, Revis. Tachin., 1897, p. 100. — Townsend, Annals Ent. Soc. 

 Amer., vol. 8, 1914, p. 89; Proc. Biol. Soc. Wash., vol. 28, 1917, p. 21.— 

 ToTHiLL, Canad. Ent., vol. 45, 1913, p. 70. — Gbeene, Proc. U. S. Nat. Mus., 

 vol. 60, art. 10, 1922, p. 11, fig. 27 (puparium). 



Oxexorista thompsoni Townsend, Proc. Ent. Soc. Wash., vol. 14, p. 165. 



Only the uppermost pair of frontal bristles reclinate; thorax and 

 abdomen usually with a bluish tinge; hind tibiae thickly ciliate; 

 bucca one-sixth the eye height. 



Front of male from 0.20 to 0.25, and in the female from 0.30 to 

 0.33 of the head width ; face and front silvery, the latter with vitta 

 as wide as either parafrontal; facial ridges bristly on the lowest 

 third (if bristly one-half way up, see lohelme), bucca one-sixth the 

 eye height ; palpi yellow, thickly beset with short black hairs which 

 are longer at base; third joint of antennae of female scarcely three 

 times as long as the second, but little longer in the male; arista 

 thickened at base the penultimate joint short. Thorax black, with 

 a bluish tinge and lightly sprinkled with gray pollen; five narrow 

 black vittae, the outer ones interrupted at the suture; four dorso- 

 central macrochaetae ; scutellum at the tip somewhat yellowish, the 

 disk covered with erect hairs and bearing three or four pairs of 

 long marginal bristles besides the shorter apical pair. Sternopleura 

 thickly clothed with fine hairs and bearing three bristles. Abdomen 

 black, faintly grayish poUinose with distinct bluish tinge, destitute 

 of discal macrochaetae, the first and second segments with one pair 

 each of median marginal macrochaetae, the third a marginal row and 

 the fourth a marginal and submarginal row; third abdominal seg- 



' Proc. U. S. Nat. Mus., 1921, vol. 60, art. 10, flg. 18. 



