1924 ] 
Review of the Dipterous Family Piophilidce 
79 
6. One dorsocentral bristle; cilia of calypteres white; wings 
uniformly subhyaline; front tibiae yellowish; (W. U. S.) 
testaceus, n. sp. 
Two dorsocentrals; cilia of calypteres brown; wings with 
narrow clouding at apex; front tibiae brown. (Wash.) 
polypori, n. sp. 
7. Pleurae, scutellum and end of abdomen reddish (Eur.) 
analis Meigen 
Pleurae, scutellum and abdomen black, only prothorax and 
humeri yellowish; front yellow. (W. U. S.) . nigritellus,n.sp. 
Mycetaulus costalis, n. sp. 
Male. Length 3 mm. Front reddish, occiput, face and 
cheeks testaceous, thorax luteous, abdomen black. Front 
tapering, slightly longer than width at anterior ocellus where it 
is twice as wide as at antennae, posterior fronto-orbital strong. 
Notal hairs moderately scattering. Retracted genitalia black. 
Legs including coxae mostly pale yellow, last tarsal joint dusky. 
Halteres white, calypteres dirty, with black fringe; wings mainly 
clear hyaline, costa, first vein and end of second and third veins 
black, remainder of veins yellowish, anterior edge of wing bor- 
dered with black which also borders the black tips of the second 
and third veins, costal cell wholly black, anterior crossvein 
about one-fourth the length of the posterior and located near 
two-thirds the length of the discal cell. 
Holotype, North slope of Mt. Hood, Oregon, 29 July, 1921, 
at 3000 feet elevation. 
Mycetaulus nigritellus, n. sp. 
Male. Length 3 mm. Head bicolored, thorax and abdomen 
black, front legs partly black, wings uniformly but lightly brown- 
ish hyaline. Upper two-thirds of occiput black continuing for- 
ward on the ocellar triangle and as orbital stripes to the posterior 
fronto-orbital bristle, remainder of front luteous, face, cheeks 
and lower orbits pale yellow, lower setulse indistinct, clypeus 
narrowly brown, antennae luteous, the upper part of third joint 
