arr. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 137 
Fic. 84.—P. pavida Coquillett. Antenna; 98, male genitalia. 
85.—P. notata (Wiedemann). Antenna. 
86.—P. limata Coquillett. Antenna; 101, male genitalia. 
87.—P. acuta Adams. Antenna. 
88.—P. baccata Coquillett. Antenna. 
89.—P. melampodia Loew. Antenna. 
90.—P. platancala Loew. Antenna. 
91.—P. auranttaca Coquillett. Antenna. 
92.—P. pollinosa, new species. Antenna. 
93.—P. signatipennis, new species. Antenna. 
94.—P. argentifrons, new species. Antenna. 
95.—P. cinerea, new species. Antenna. 
96.—P.munda Loew. Male genitalia. 
97.—P. marcida Coquillett. Male genitalia, lateral and ventral views. 
98.—P. pavida Coquillett. Male genitalia. 
99.—P. costalis Loew. Male genitalia. 
100.—P. argentifrons, new species. Male genitalia. 
101.—P. limata Coquillett. Male genitalia. 
102.—P. variegata occidentalis, new subspecies. Male genitalia. 
103.—P. signatipennis, new species. Male genitalia. 
104.—P. aurantiaca Coquillett. Male genitalia. 
105.—P. morata Coquillett. Male genitalia. 
106.—P. festina Coquillett. Male genitalia. 
107.—P. flavipennis, new species. Male genitalia. 
PLATE 9. 
Fie. 108.—Dialineura melanophleba (Loew). Wing. 
109.—D. crassicornis (Williston). Male. 
110.—D. crassicornis (Williston). Genitalia. 
111.—D, melanophleba (Loew). Male genitalia. 
112.—D. melanophleba (Loew). Head of male (higher magnification than 113 
and 114). 
113.—Tabuda fulvipes Walker. Head of male. 
114.—T. borealis, new species. Head of male. 
115.—T. fulvipes Walker. Male genitalia. 
116.—T. borealis, new species. Male genitalia. 
117.—T. fulvipes Walker. Wing. 
Puate 10. 
All figures other than 118 show the female head from above. 
Fie. 118.— Metaphragma planiceps (Loew). Male. 
119.—Thereva johnsoni Coquillett. 
120.—T. brunnea, new species. 
121.—T. frontalis Say 
122.—T. duplicis Coquillett. 
123.—T. vanduzeei, new species. 
124.—T. otiosa Coquillett. 
125.—T. melanoneura Loew. 
126.—T. hirticeps Loew. 
127.—T. pygmaea, new species. 
128.—T. semitaria Coquillett. 
129.—T. vialis Osten Sacken. 
130.—T. candidata Loew. 
131.—T. comata Loew. 
