AMERICAN DIPTERA. 289 



84. Third vein furcate beyond the tip of the marginal cell. 



(lolabraria sp. nov. 

 Third vein furcate before the tip of the marginal cell. 



(lolabraria subsp. diiiiconveiiita. 



85. Front metatarsi thickened, black ; hind tibife shaggy- . -caiiaister sp. nov. 

 Front metatarsi slender, red ; legs not shaggy. . • falcata sp. nov. 



86. Third antennal joint short and broad ; second segment of abdomen with a 



conspicuous fringe of long black bristles toward the sides; abdomen 



brownish poUinose giilosa Coqnillett. 



Third antennal joint long, slender; abdomen generally gray pollinose 87. 



87. Slender species; dusted with whitish; wings narrow; base of the femora and 



tibiae paler than the apex Steuoptera Loew. 



Of other conformation 88. 



88. Species marked with yellow olauda Coqnillett. 



Ground color wholly black 89. 



89. At most three bristles in front of the halteres ; antennae comparatively long.. 90. 

 Several bristles in front of the halteres; antennae shorter 91. 



90. Hind coxae with conspicuous hairs on their front side ■ . . .falcata sp. nov. 

 Hind coxae with but few apical hairs iiiKla Loew. 



91. Third vein furcate beyond the tip of the marginal cell, the posterior branch 



ending before the apex of the wing; occiput densely bristly 92. 



Furcation of the third vein opposite or in advance of the tip of the marginal 

 cell, the posterior branch terminating at or beyond the wing tip. • .94. 



92. Large gray-white species devoid of brownish pollen ; third vein distinctly 



arched forward so that the first submarginal cell is narrowed. 



jeripes sp. nov. 



Smaller species, in part brownish pollinose; third vein straight before its 



furcation 93. 



93. With six scutellar bristles (lolabraria sp. nov. 



With four scutellar bristles liiixopolia sp. nov. 



. 94. Legs glaucous; abdominal segments margined with gray posteriorly. 



cacuminifer sp. nov. 

 Legs shining ; abdomen unicolorous 95, 



95. Vein between discal and fourth posterior cells much shorter than that be- 



tween the third and fourth posterior cells 96. 



The two sections equal (lolabraria subsp. (lisscoiiTeiiita. 



96. Species of the Middle States; hind tibiae straight, rather stout cylindrical ; 



hind femora with numerous thorn-like bristles distally. 



enodis sp. nov. 

 Species of the Western States; hind tibite distinctly bent near the knee; bris- 

 tles of the hind femora longer 97. 



97. Coxae generally wholly black; abdomen brownish dusted ; middle tibiae fim- 



briate apically with a few stiff black bristles. 



serperastroriiin sp. nov. 



Coxae reddish apicall.y ; abdomen slaty gray ; middle tibia? not spurred with 



terminal bristles canaster sp. nov. 



Einpis aiiiiulipes Wheeler et Melauder (Fig. 115). 

 Biol. Cent. Am., Dipt. Sujjpl., Nov., 1901, p. 369. 



Female. — Black. Front and face dusted with white. Antennae black; the third 



TRANS. AM. ENT. SOC, XXVIII. (37) AUGUST, 1902. 



