42 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



dorsum of the first segment, which is black, thickly gray pollinose 

 on basal two-thirds of each segment, the apical third with thin 

 brown pollen ; thick, the fourth segment shorter than the third and 

 somewhat wedge-shaped. Venter usually gray pollinose. No discal 

 macrochaetae ; first segment with one short median pair, sometimes 

 vestigial, second with one pair, third with marginal row, the fourth 

 with two rows, one uncommonly large and stout at the middle, the 

 other much smaller at the extreme apex. Abdominal hairs de- 

 pressed. Legs black; mid tibiae wdth one bristle on the outer front 

 side near the middle; hind tibiae evenly ciliate with sometimes a 

 longer bristle near the middle. Wings hyaline, the apical cell open, 

 third vein bearing two or three bristle at its base. 



Length 5.5 to 8 mm." 



The type material now in the United States National Museum 

 includes two specimens reared from Pempelia, species at Fort Worth, 

 Texas; one from Omphalocera cariosa Lederer at Oswego, Kansas; 

 and from a pyralid at Cadet, Missouri. Another specimen was 

 reared from Lagoa crispata Packard at McMeckin, Florida ; one from 

 Loxostege similalis Guenee by E. G. Kelly at Waurika, Oklahoma. 

 There are four collected specimens from Piano, Texas (Tucker) ; 

 one from Columbus, Texas (Eiley collection) ; and one from Plum- 

 mer Island, Maryland (Shannon). 



Coquillett reported specimens reared from Ceratomia undulosa. 

 Walker at St. Louis, Missouri, by Kiley. Eeinhard has reared the 

 species from Loxostege similalis Guenee at Laredo and College 

 Station, Texas. 



ry;?e.— Male, Cat. No. 3601, U.S.N.M., from Fort Worth, Texas. 



ZENILLIA FUTILIS Osten Sacken. 



Exorista futilis Osten Sacken, Canad. Ent., vol. 19, 1887, p. 161.— 

 Coquillett, Revis. Tachin., 1897, p. 98.— Williston, in Scu'dder's But- 

 terflies of New England, vol. 3, 1889, p. 1917, pi. 89, fig. 10.— Tothill, 

 Canad. Ent., vol. 45, 1913, p. 71.— Greene, Proc. U. S. Nat. Mus , vol' 

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

 Euexorista futilis Townsend, Proc. Ent. Soe. Wash., vol. 14, 1912, p. 166. 

 Readily separated from all others of this group by the dark re- 

 flecting spots on the parafacials just below the frontal bristles. 



Front of male 0.263-0.274-0.288 and in the female 0.285-0.307-0.333 

 of the head width ; face and front yellowish pollinose ; the former with 

 a dark brown reflecting spot just below the lowest frontal bristles; 

 facial ridges bristly on the lowest fourth ; bucca about one-sixth the 

 eye height; palpi black; third joint of the antennae in the male three 

 and one-half and in the female two and one-fourth times the 

 second, arista thickened on the basal fifth, the penultimate joint 

 short. Thorax black, gray pollinose bearing four dorsocentral macro- 



