14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



men moderately constricted basally, the apex with dense, appressed 

 golden yellow pile. Recorded from Mexico. 

 Type. — In British Museum. 



PLANES WILLISTONI, new species 



Male. — Antenna blackish, reaching nearly to oral margin; third 

 joint fairly broad; arista yellow, slightly longer than antenna; lower 

 part of face in front yellowish; legs black, the bases and apices 

 of tibiae and first three tarsal joints of all tarsi yellow, hind basitar- 

 sus brownish ; hind f ermur greatly swollen ; hind tibia arcuate ; metas- 

 ternum pilose and with pair of rudimentary spurs; abdomen elon- 

 gate, constricted at second and base of third segments ; second tergite 

 largely yelloAv; apex of abdomen with normal pale pile. Length, 

 12 mm. 



Type locality. — Sierra Madre, Chih., Mexico, about 7,300 feet 

 altitude, flowers of Rhus glabra (C. H. T. Townsend). 



Type.— C^t. No. 28675, U.S.N.M. 



Differs from pauxilla chiefly in the broader third antennal joint 

 and lack of dense yellow pile on fourth tergite. 



PLANES KONDANII, new species 



Male. — A much larger species than vagans. Head large, broader 

 than thorax; ocellar triangle more than three times as broad as its 

 greatest width, ocelli midway ; antennae black, reaching to oral mar- 

 gin ; arista brownish ; face black except yellowish above anterior oral 

 margin ; femora black ; tibia yellowish basally, brownish beyond ; two 

 basal joints of fore and mid tarsi yellowish, remaining joints and 

 hind tarsi brown ; metasternum with obtuse spurs ; abdomen elongate, 

 constricted medianly ; the second and third tergites each with a pair 

 of small yellowish spots; discal cross vein slightly before middle of 

 discal cell, fairly oblique, wings smoky. Length 13 mm., wing 

 9 mm. 



Type locality. — Higuito, San Meteo, Costa Rica (Pablo Schild). 



Type.— C^t. No. 27740, U.S.N.M. 



PLANES VAGANS (Wiedemann) 



Syritta americana ScHiNEai? 

 Syritta mexicana Bigot? 



Male. — Fairly large species; ocellar triangle very narrow and 

 elongate ; frontal triangle shining bluish-black, bordered with silvery 

 pollinosity; antennal prominence well developed and projecting; 

 antennae brownish; fairly elongate, third joint nearly twice as long 

 as wide; face yellowish white, densely coated with silvery pollen; 

 jowls blackish ; yellowish pollinose mesonotal stripes rather in- 

 distinct ; fore and mid tibiae yellowish ; two basal joints of fore 



