1898.] NATURAL SCIENCES OF PHILADELPHIA. 187 



6. Wing of Pollenia virido-cana nov. sp. 



7a. Bristles of thorax of Lucilia spinicosta nov. sp. 



7b. Sternopleura of Lucilia spinicosta nov. sp. 



7c. Mesopleura of Lucilia spinicosta nov. sp. 



8. Wing of Lucilia spinicosta nov. sp. 



9a. Bristles of thorax of Parochromyia varia nov. sp. 



9b. Sternopleura of Parochromyia varia nov. sp. 



9c. Mesopleura of Parochromyia varia nov. sp. 



10. Wing of Parochromyia varia nov. sp. 



1 1 . Marking of abdominal segment of Parochromyia varia. 



12. Arista of Somalia enigmatica nov. sp. 



13. Abdomen of Somalia enigmatica nov. sp. 



14. Wing of Somalia enigmatica nov. sp. 



15a. Bristles of thorax of Somalia enigmatica nov. sp. 

 15b. Mesopleura of Somalia enigmatica nov. sp. 

 15c. Sternopleura of Somalia enigmatica nov. sp. 



Diagrams of positions of bristles of tibise of Somalia enigmatica. 



1. Anterior tibia ; mesal surface, extensor row. 



2. Middle tibia ; anterior surface. 



3. Middle tibia ; posterior surface. 



4. Middle tibia ; flexor surface. 



5. Posterior tibia ; lateral surface. 



6. Posterior tibia ; mesal surface. 

 III. 



1. Antenna of Paracompsomyia nigripennis nov. sp. 



2a, 2b, 2c. Thorax, mesopleura and sternopleura of same 



3. Wing of same. 



4 to 10 positions of bristles of tibise of same. 



