ZENILLIA AND ALLIED GENERA — SELLERS 99 



KEY TO THE SPECIES OF SISYROPA 



1. Except for the reclinate prevertical bristle, the male usually with 1 and 

 female usually with 2 reclinate upper frontal bristles, 7 to 9 frontal 

 bristles; frontal orbit, face and cheek, and posterior orbit light-silvery- 

 gray pollinose, parafrontal with a slight brassy tinge; antenna black, 

 third segment about three times as long as the second, slightly rufous at 

 junction of second and third segments, second segment slightly rufescent 

 in female; palpus yellow; median dorsal vitta of abdomen shining black, 

 uninterrupted on the second and third segments; midtibia bearing 3 

 median bristles on anterolateral side, upper bristle nearly as strong as 

 middle, lower bristle much smaller ; size 6 to 8 mm. ; a lighter appearing 



species 1. eudryae (Towusend) (p. 99) 



Except for the reclinate prevertical bristle, the male and female with no 

 reclinate upper frontal bristles, male with 10 or 11 and female with 7 to 

 9 frontal bristles ; frontal orbit blackish-gray pollinose, the black gradually 

 becoming more predominant toward vertex, cheek dark-gray pollinose, face 

 and posterior orbit silvery pollinose with a smoky tinge; antenna black, 

 third segment about 2V 2 times as long as second ; palpus yellow, slightly 

 infuscated at base ; median dorsal vitta of abdomen shining black on second 

 segment, becoming indistinct on basal half of third segment ; mid tibia 

 bearing three or more strong median bristles on anterolateral side, and 

 when with three, upper bristle nearly as strong as middle, lower bristle 

 usually not much smaller than upper ; when with more than 3 bristles, 

 especially in some of the larger females, additional bristles usually situated 

 between normal 3 as described above ; size 8 to 11 mm. ; bristly appearance 

 of this species accentuated by head, thorax, and abdomen appearing 

 more densely covered with longer, finer hairs; a blacker appearing 

 species 2. alypiae, new species (p. 101) 



1. SISYROPA EUDRYAE (Townsend) 



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

 vol. 7, pp. 329-331, 1896.— Coquillett, U. S. Dept. Agr., Div. Ent., Tech. Bull. 

 7, p. 100, 1897. — Smtth, Catalogue of New Jersey insects, p. 780, 1909. — 

 Tothiix, Can. Ent., vol. 45, p. 70, 1913; Ottawa Nat., vol. 28, No. 9, p. 114, 

 1914.— Greene, Prop. U. S. Nat. Mus., vol. 60, ait 10, p. 17, fig. 27 (puparium), 

 1922. 



Oxexorista eudryae (Townsend) Townsend, Proc. Ent. Soc. Washington, vol. 

 14, p. 165, 1912. 



Exorista eudryae of Thompson (nee Townsend) Townsend, Ann. Ent. Soc. Amer., 

 vol. S, p. 89, 1915. 



Oxexorista thovrpsoni Townsend (partim), Proc. Biol. Soc. Washington, vol. 28, 

 p. 21, 1915. 



Zenillia eudryae (Townsend) Aldrich and Webber, Proc. U. S. Natl. Mus., vol. 

 63, art. 17, pp. 21-22, 1924.— Johnson, List of New England Diptera, p. 196, 

 1925 ; Biological survey of Mount Desert region, The insect fauna, pt. 1, 

 p. 201, 1927.— West, Cornell Univ. Agr. Exp. Stat. Mem. 101, p. 814, 1928.— 

 Aldrich, Proc. U. S. Natl. Mus., vol. 80, art. 20, p. 3, 1932. — Schaffner and 

 Griswold, U. S. Dept. Agr. Misc. Publ. 18S, p. 112, 1934. 



Sisyropa eudryae (Townsend), Townsend, Manual of myiology, pt. 4, pp. 207, 

 209, 1936. 



Aldrich and Webber have discussed the synonymy of eudryae and 

 tho?npsoni. I have further compared thompsoni with eudryae. The 



