Vol. IX] COLE & LOVETT—NEJV OREGON DIPTERA 235 



Legs all black ; front tarsi normal in length and with short black pile ; 

 hind tibiae with the silvery white pile as in male, but no such pile on the 

 tarsi ; claws and pulvilli as in male. 



Allotype (No. 486), female, collected at Mackenzie Ridge, 

 Ore., altitude 6,000 feet, August 1, 1909, in the Museum of 

 the California Academy of Sciences, 



There are several males from the sub-alpine region on Mt. 

 Jefferson, collected by J. C. Bridwell, and now in the Oregon 

 Agricultural College Collection. One female from Horse Lake, 

 altitude 6,000 feet, July 25, 1909. 



21. Metapogon setigerum Cole, new species 



(Plate 17, fig. 17) 



Male : Length 8.5 mm. Black, largely covered with gray and silvery 

 pollen ; base of wings white, the apical half brown ; face and frons gray 

 pollinose with a peculiar olive tinge, especially on the frons; four strong 

 ocellar bristles. A few weak small bristles in center of frons, stronger 

 along sides; face with numerous strong black bristles in place of the usual 

 pile, reaching from oral margin almost to base of antennae ; antennae black, 

 the second joint slightly larger than first, the third a little longer than the 

 first two taken together; one bristle beneath second antennal joint, two 

 strong bristles beneath first : bristles of upper occiput strong, and black, 

 the pile of occiput and beard white ; occiput gray-pollinose, yellowish above. 



Thorax and pleura almost entirely pruinose, with a yellowish tinge in 

 places ; median geminate stripe gray, more or less well defined ; inside of 

 the humeri, on each side of the median stripe, is a faint brown spot ; four 

 strong dorsocentrals, two small humerals, and three bristles above the 

 pleural suture in a triancle ; most of the metapleural tuft black; scutellum 

 pruinose above with two strong apical bristles ; knob of halteres yellow, 

 the base pale brown ; dorsum of thorax destitute of pile ; with only a few 

 scattered minute bristles ; in front of the scutellum is a spot appearing 

 black in certain lights; spines and pile on coxae whitish; sternopleura with 

 a large spot destitute of pollen. 



Abdomen black, semi-shining; the posterior margins of segments two to 

 six widely pruinose ; sides of first segment pruinose ; posterior half of fifth 

 segment pruinose with a median wedge running to anterior margin. Sixth 

 segment pruinose except base. Posterior margin of seventh segment 

 brownish pruinose ; the pollen on five and six with a brownish tinge ; 

 dorsum of abdomen with sparse, short black pile ; genitalia black with 

 black pile ; white bristles and pile on sides of first segment ; venter black 

 with pruinose posterior margins on segments. 



Legs black with black spines and claws ; pulvilli dark gray ; pile of legs 

 sparse, short and black, that beneath tips of hind tibiae golden brown and 

 reclinate. In certain lights this same type of pile can be seen beneath the 

 fore tibiae and m^etatarsi. Basal half of wings milk white, the veins yellow 

 on basal third ; apical portion of wing infuscated, with black veins ; anterior 

 cross-vein in middle of discal cell. 



Female : Similar to above. Dorsum of thorax marked with brown ; 

 median geminate stripe brown ; a long brown spot on either side of this, 

 merging more or less anteriorly ; pruinose posterior margin of segments 

 interrupted in the middle ; seventh segment with no pruinose marks, those 



