312 E. T. CRESSON, JR. 



I have also a female from Cloudcroft, N. M., May ( Viereck, 

 A. N. S. ; Figs. 22, 186), which is very similar, but the legs 

 are mostly black with the apices of femora, apices and bases 

 of tibiae and tarsi, brownish-yellow. This may be a distinct 

 species. 



38. P. atramontensis Banks, n. sp. 



" &. Face black, silvery pollinose; antennas pale yellowish, last joint 

 long pointed below [Fig. 38], base of arista swollen, sides of occiput 

 silvery pollinose, thorax dull black ; abdomen moderately slender, 

 slightly widened at third segment, shining black, with some scattered 

 gray hairs, base gray-pollinose, hypopygium rather small ; poisers 

 pale yellow ; legs pale yellow, a prominent black spot at base of all 

 the femora [Fig. 127], largest on the hind femora, hind tibia slightly 

 curved ; all tibiae and tarsi with minute black teeth above and below. 

 Wings [Fig. 190] gray, veins black, except at extreme base, where 

 they are yellowish, small cross-veins at end of basal fifth of cell and 

 before tip of auxiliary vein, stigma barely darkened. Length, 5.0 

 mm. ; wings, 5.6 mm." 



Type. — North fork of the Swannanoa River, Black Moun- 

 tain, N. C. {coll. Banks). Taken in latter part of May. 



Paratype. — One specimen from same locality. 



The small prominent black spot at base of femora readily 

 distinguish this from every other species known in our fauna. 



I submit the following observations : Front also silvery 

 on lower part, shining above, narrowly separating the eyes ; 

 mesonotum and scutellum brownish tinged ; humeri black ; 

 pleurae and metanotum hardly tinged with gray ; abdomen 

 long, and not at all grayish ; segments subequal in length or 

 fifth little longer with two dorsal indentations ; hypopygium 

 shorter than fifth, compressed to right, without cleft (Fig. 

 119), intermediate lobe visible; ventral lobe yellow; legs 

 slender ; apical and basal post-tarsal joints in proportion of 

 of 1 : 4 ; stigma hyaline. In general form of the abdomen 

 this species resembles flavomaculatus Hough. 



39. P. xanthopodus Williston. 



d". Front and face silvery; antennas with second joint blackish, 

 and third yellow, acutely pointed. Mesonotum brown ; pleurae and 

 metanotum silvery-gray. Abdomen shining black ; lateral margins in 

 part yellowish ; first and second segments entirely, and the successively 

 narrower sides of 3-5 gray, opake. Legs yellow ; femora stout, and 



