238 Miss S. L. M. Summers on 



Pic, is probably a synonym of St. nigra^ Mticq. ; its 

 description corresponds to the type of iS^ nigra, and also with 

 Giiiiiberg's description of St. glauca (synonym of St. nigra, 

 Macq. (Austen)), 



The fiies of this ojenus are medium-sized. The largest 

 species in this collection is Stomoxys nigra, which measures 

 I'D mm. ; the smallest species is Stomoxys limbata, measuring 

 a little under 5 mm. 



Geographical distribution. — Stomoxys calcitrans has a very 

 wide distribution ; it is found wherever mankind is. It is 

 so variable that it has been described at least twenty-one 

 times as a new species. Stomoxys sitiens, Ron., is a doubtful 

 Oriental species [Bninetti) ; Rondani reported it from 

 Abyssinia. Stomoxys nigra has been found in Port Natal 

 {Macq.), Cameroons and Togo (Griinberg). Stomoxys trian- 

 gularis from South India (^Brunetti). Stomoxys oblongo- 

 punctata hom Assam [Brunetti). Stomoxys pulla is reported 

 from India {Austen). Stomoxys limbata from India, Assam, 

 and Ceylon. Stomoxys pusilla is also from India, while 

 Stomoxys indica has been met with in India, Assam, and 

 Ceylon. 



Stomoxys pratti, sp. n. 



S . Length almost 7 mm. ; width of front narrow, ^ width 

 of the head. Width of median stripe on the thorax "5 mm. 

 Front not straight. 



Rather a dark species. The front is very little wider than 

 the frontal stripe. The face and antennas are greyish brown. 



Thorax has the usual longitudinal stripes in front of the 

 transverse suture, and, if viewed from behind at a low angle, 

 they can be traced to the middle of the thorax. They can 

 be seen still more distinctly if the head is turned away from 

 the light. 



Abdomen viewed from above is dark brown ; from behind 

 at a low angle the last segment is grey, while the other 

 segments have broad posterior bands. 



Legs. The femora are cinnamon-brown, the tibire and tarsi 

 are a pale brownish yellow. 



Wings are dirty brown. 



? . Length 6 mm. ; width of front ^ the width of the 

 head. Similar to the male, except that the tibia? and tarsi of 

 the legs are a very pale yellow and the femora of the last 

 pair are black-lircwn. 



This species is near St. brunn/pcs (an Alrican species, 

 Griinberg, 1906, Zool. Anz. Bd. xxx. p. 89), but ditt'ers in 



