ZEN1LLIA AND ALLIED GENERA — SELLERS 57 



Carcelia gnava of authors (nee Meigen). — Howard and Fiske, U. S. Dept. Agr., 

 Bur. Ent, Bull. 91, pp. 88, 132, 231-232, 308, 1911— Crossman and Webber, 

 Journ. Econ. Ent., vol. 17, pp. 67-76, 1924. 

 Carcelia separata (Rondani) Velleneuye, Feuille Jeun. Nat., ser. 5, vol. 42, p. 

 89, 1912.— Baer, Zeitschr. Angew. Eut., vol. 7, p. p. 142 (108), 1921.— Stein, 

 Arch. Naturg., Abt. A, Heft. 6, p. 65, 1924.— Burgess and Ciossman, U. S. 

 Dept. Agr. Tech. Bull. 86, pp. 114-115, 1929— Baranoef, Insti'ut fur Hygiene 

 und Schule fur Voll^gesundheit, Zagreb, Arb. parasit. Abt., No. 3, 1931 — 

 Brown, U. S. Dept. Agr. Circ. 176, p. 13, 1931. 

 Setiometopia separata (Rondani) Townsend, Manual of myiology, pt. 4, p. 209, 

 1936. 

 Head with front of male at narrowest 0.24 to 0.25 (in three speci- 

 mens) and in female 0.27 to 0.29 (in three specimens) of head width; 

 frontal row of 9 to 12 bristles in male and 5 to 7 in female, extending 

 from a little below base of third antennal segment to 2 reclinate upper 

 frontals (preverticals) ; facial ridge bristly on lowest one-fifth to one- 

 fourth; gena one-fifteenth or less eye height; frontal orbit silvery 

 gray, face and posterior orbit silvery white; gena grayish silvery 

 white; antenna black, third segment three times as long as second; 

 arista thickened on basal one-third, penultimate segment short ; palpus 

 yellow. 



Throax black, silvery-gray pruinose; marked by four mesonotal 

 vittae, median one lacking; four postsutural dorsocentral macro- 

 chaetae; ground color of scutellum yellow covered with this silvery 

 pollen, three pairs of marginal scutellars and one decussate apical pair 

 turned backward, one pair of discal scutellars ; two sternopleural mac- 

 rochaetae ; legs black with tibia yellowish brown ; fore tibia with one 

 median posterolateral bristle ; midtibia with one medium anterolateral 

 bristle, inner ventral bristle lacking ; hind tibia ciliate, with one longer 

 bristle ; hind coxa bare behind ; wing grayish hyaline, third vein with 

 two or three bristles at base. 



Abdomen black covered with silvery pollen including shoulders of 

 first segment ; dorsal vitta very obscurely marked except on segment 

 2, black ; in male sides of second segment red, female black ; no discal 

 macrochaetae, in female on third segment (rarely on second) 2 or 3 

 hairs or bristles slightly stronger than rest; first segment with 1 

 pair of marginal macrochaetae; second segment in male with 1 pair, 

 in female usually 2 pairs of marginal macrochaetae; third segment 

 with a row of marginal macrochaetae; fourth segment covered with 

 erect bristles about one-half size of macrochaetae. 

 Length 8 to 9 mm. 



Distribution.— Central and southern Europe. This species has 

 been liberated in the northeastern part of the United States, but as 

 yet it has not been recovered. 



Hosts. — Porthetria dispar (Linnaeus) (summer host). Hibernat- 

 ing hosts: Pterostoma palpinam (Linnaeus), Pheosia tremula 



