30 PROCEEDINGS OF THE NATIOIS'AL MUSEUM. vol.63. 



thinly gray pollinose from the side; frontal bristles in a single row 

 extending below the level of the arista, facial ridges bristly on the 

 lowest fourth or third ; face gray pruinose below the row of f rontals ; 

 palpi black; bucca one-third the eye height; shining black below the 

 impression; antennae slightly shorter than face, the third joint hardly 

 twice the length of the second, arista thickened on more than basal 

 half, penultimate joint slightly elongate. Thorax black, lightly 

 dusted with a bluish gra}^ pollen bearing three dorsocentral macro- 

 chaetae; scutellum black with three pairs of long lateral and one 

 rather long apical pair of bristles; sternopleura with three bristles. 

 Abdomen black, subshining, first segment wholly black, the remain- 

 ing ones whitish pollinose at their base; one pair of weak marginal 

 macrochaetae on the first segment, the second with one pair each of 

 median discal and marginal, the third with one pair median di seals 

 and a marginal row and the fourth wholly covered with macrochaetae. 

 Legs black, bristly, mid tibiae with two or three stout bristles on 

 the outer front side; hind tibiae with many bristles of different 

 length — not ciliate. Wings hyaline, costal spine strong, the third 

 vein slightly sinuate, widening the apical cell beyond its middle, 

 and bearing three or four bristles at its base. 



Length 5 to 8 mm. 



Redescribed from the type series of seven males and a female, 

 collected at Moscow and Lewiston, Idaho (Aldrich) ; and from six 

 additional specimens from Ormsby County, Nevada (Baker) ; 

 Colorado (Baker) ; Koehler, New Mexico (Walton) ; Fern Rock, 

 Pennsylvania (Harbeck) ; Longmont, Colorado. 



In Walton's manuscript list the species is recorded as having been 

 reared from Nephelodes emmedonia Cramer at Rapatee, Illinois, by 

 Hugo Kahl; Walton identified the specimen for the Illinois Natural 

 History Survey. 



Type. — Male, Cat. No. 6212, from Moscow, Idaho. 



ZENILLIA SUBMISSA, new species. 



The narrow front, thinly hairj^ e3^es and the infuscated crossvein 

 serve to separate this species from the others. 



Front of male unusually narrow, 0.147 of the head width; when 

 viewed from the front the face at the vibrissae is much wider than the 

 front at the base of antennae, at least five times the width of the 

 front at that point ; face and front gray pruinose, the frontal bristles 

 long, reaching below the base of the third antennal joint; eyes 

 faintly hair}^ ; facial ridges bristly on the lowest fourth ; bucca one- 

 tenth the eye height ; palpi black ; antennae slightly shorter than the 

 face, the third joint two and one-fourth times the second, arista 

 thickened on the basal third, the penultimate joint somewhat elon- 



