302 PROCnEDIXGS OF THE XATIOXAL MUSEUM. vol.51. 



vittae, the inner pair nearly as heavy as the outer. Abdomen with 

 silvery-gray pollen, naost distinct on the broad bases of the two inter- 

 mediate segments, the hind borders of fii'st three segments with 

 brownish-golden tmge. Legs bro\smisli, the tibiae and tips of femora 

 rufofulvous, the tarsi dark brown. Wings clear. Tegulae nearly 

 white. 



Holotype.—No. 20029, U.S.N.M. 



This is the specimen mentioned by Doctor Williston ^ in his report 

 on Diptera collected by the United States Bureau of Fisheries steamer 

 Albatross in 1887-88, as a TacJiinid which he could not locate in any 

 genus known to him. 



OREOPHYTO, new genus. 



Genotype. — Oreophyto ocJireicornis, new species. 



Differs from Arctophyto as follows: Male. Vertex about as wide 

 as length of third antennal joint. Two or three pairs of ocellars, 

 the front pair strongest. All macrochaetae strong. Head much 

 longer, parafacials broader; epistoma broader, more widely separat- 

 ing the vibrissal angles; vibrissae more removed from oral margin. 

 Palpi stouter, not markedly thickened apically. Third anteimal 

 joint quite twice as long as second. Three sternopleurals; three 

 postsuturals, sometimes a fourth one developed. Two strong lateral 

 scutellars with some weaker ones between them, a strong decussate 

 apical pair, two discal pairs. Last three abdominal segments with 

 strong discals. Legs stouter, and whole body stouter. No long 

 hairs on abdomen. Wings more pointed at tip, the apical cell ending 

 much farther before same. Cubitus forming a right angle, usually 

 with stump, farther removed from hind margin of wing. 



OREOPHYTO OCHREICORNIS, new species. 



Length of body, 12 to 14 mm.; of wing, 9.5 to 10 mm. Four 

 males; one Corvallis, Oregon, June 12; one Mount Angel, Oregon 

 (F. Epper) ; two Oregon. 



Black, thickly to thinly silvery. Frontalia black. Third antennal 

 joint clear light orange or ochreous, the arista black. Palpi rufous, 

 more or less blackish basally. Parafrontals and parafacials thicldy 

 silvery white. Thoracic dorsum and scutellum rather thinly pol- 

 linose, outer vittae very heavy, umer ones moderately heavy and 

 more or less confluent with a median one. Abdomen rather thickly 

 silvery all over, as seen with varying light incidence, the segments 

 appearing more or less broadly black from above. Legs black. 

 Wings grayish. Tegulae white. 



Holotype.—^o. 20030, U.S.N.M. (Corvallis). 



' Proc. U. S. Nat. Mus., vcL 12, 1889, p. 203. 



