366 Professor Williston on the 



anterior cross- vein at the middle of the discal cell ; the distance 

 between the cross- veins is less than three times that from the 

 posterior one to the angle. Length 9 mm. 



$ . A single strong reclinate bristle at the beginning of the 

 frontal row : two proclinate, orbital bristles on each side ; fifth 

 abdominal segment very small, nearly concealed, red ; front a little 

 broader above. 



Four specimens. St. Vincent. 



5. Sarcojpliaga chsetopygialis, n. sp. 



(J. Width of the front above less than the length of the 

 third antennal joint ; a stout reclinate bristle at the angle of the 

 eyes, another, less strong, forming the beginning of the frontal 

 rows ; and a pair of small, proclinate ocellar bristles. Bristle of 

 the antennae plumose nearly to the extremity. Sides of the face 

 bare; cheeks with black hairs. The dorso-central bristles of 

 the mesonotum extend to the front ; black stripes of the 

 mesonotum much broader than the grey intervals. Scutellum with 

 two stout bristles on each side, and without the apical pair. 

 Abdomen shining black, with four rows of grey spots, only 

 moderately changeable in different reflections. Hypopygium 

 prominent, shining red, the first segment with well-developed 

 bristles on its hind margin ; hair sparse, black. Wings distinctly 

 greyish-hyaline ; first and third veins with bristles ; posterior 

 cross-vein distinctly less oblique than the apical cross-vein ; 

 anterior cross- vein at the middle of the discal cell. Length 7-8 mm. 



$ . Front a little broader above ; anal segment red, small, 

 nearly concealed ; front with orbital bristles. 



Numerous specimens. St. Vincent. 



MUSCID^. 



MUSCA. 



Linne^ Fauna Suecica, 1763. 

 1. Micsca domestica. 



Musca domestica J Linne^ etc. — Cosmopolitan. 

 Musca harpyia, Harris, Bnt. Correspond., 335.— 

 North America. 



Stomoxys. 

 Geoffroy, Hist, des Ins., i., 1764. 

 1. Stomoxys calcitrans, Linne, etc. — Cosmopolitan. 



