138 PROCEEDINGS OF THE NATIONAL MUSEUM. VoL. 62. 
Prats 11. 
Fia. 132.—Thereva pseudoculata, new species. Antenna. 
133.—T. pacifica, new species. Antenna. 
134.—T. nivetpennis Kréber. Antenna. 
135.—T. vanduzeei, new species. Antenna. 
136.—T. flavipilosa, new species. Antenna. 
137.—T. bella Kréber. Antenna. 
138.—T’. semitaria Coquillett. Antenna. 
139.—T. novella Coquillett. Antenna. 
140.—T. vialis Osten Sacken. Antenna. 
141.—T. otiosa Coquillett. Antenna. 
142.—T. johnsoni Coquillett. Antenna. 
143.—T. pygmaea, new species. Antenna. 
144.—T'. pygmaea, new species. Male genitalia. 
145.—T'. melanoneura Loew. Male genitalia. 
146.—T. cockerelli, new species. Male genitalia. 
147,—T. vialis Osten Sacken. Male genitalia. 
148.—T. duplicis Coquillett. Male genetalia. 
149.—T. candidata Loew. Male genetalia. 
150.—T. frontalis Say. Male genitalia. 
151.—T. comata Loew. Male genitalia. 
152.—T. brunnea, new species. Male genitalia. 
153.—T. pseudoculata, new species. Male genitalia. 
154.—T. fucata Loew. Male genitalia. 
155.—T. cingulata Kréber. Male genitalia. 
PLatTeE 12. 
Wings of various species of Thereva. 
Fig. 156.—Thereva melanoneura Loew. 
157.—T. vanduzeei, new species. 
158.—T. vialis Osten Sacken. 
159.—T. duplicis Coquillett. 
160.—T’. nivetpennis Krober. 
161.—T. comata Loew. 
162.—T. fucata Loew. 
163.—T. bakeri, new species. 
164.—T. brunnea, new species. 
165.—T’. pygmaea, new species. 
166.—T. hirticeps Loew. 
167.—T. otiosa Coquillett. 
PuaTE 13. 
Early stages of Therevidae. 
Fig. 168.—Larva of Psilocephala frontalis, new species. 
169.—Head and prothorax of same, greatly enlarged. 
170.—Pupa of P. frontalis. 
171.—Anterior part of pupa of P. haemorrhoidalis (Macquart), showing split 
madeiby emerging adult. 
172.—Posterior portion of same, showing the arrangement of spines. 
173.—Pupa of Psilocephala limata Coquillett. 
174.—Pupa of P. argentifrons, new species. 
