172 PROCEEDINGS OF THE ACADEMY OF [1898. 



my observation extends) on either of the other tibise, Very often 

 the surfaces of the tibire have other rows besides the flexor and ex* 

 tensor, such are usually made up of minute bristles, except for the 

 terminal subapical member, but sometimes one or more of the mem- 

 bers are largely developed and in consequence an oblique row of 

 large bristles may appear on the tibia as in I, 2. 



The apical bristles of the tibiae are remarkably constant in num- 

 ber, arrangement and relative size. 



Although the number of specimens collected by Dr. Smith in the 

 group Muscidre (sens, strict.) is quite small, only thirty-eight, never- 

 theless the collection is very interesting, including eleven genera, 

 of which three are new, and thirteen species of which seven are 



new. 



Genus GLOSSINA. 



Glossina longipennis Corti. 



Two females taken August 19, 1894, and August 24, 1894. 

 They agree perfectly with Corti's description, except that there are 

 no brown spots on the abdomen. 



Genus IDIA. 

 Idia lunata Wied. 



Three females taken September 29, 1894, October 2, 1894, and 

 November 10, 1894. 



Genus COSMINA. 



Cosmina sp. ? 



Female, taken November 10, 1894. Too imperfect to identify or 

 describe. 



Genus MUSCA. 



Musca domestica L. 



Female specimen, taken October 11, 1894. This is a variety with 

 color and markings of abdomen somewhat like the male. The 

 ground color is a dull reddish-brown, on each of the first three seg- 

 ments there is a narrow, median, cephalo-caudal black stripe ; the 

 whole of the ventral surface of all segments and the cephalic half 

 of the dorsal surface of the first segment are rather more yellow 

 than the remainder of the dorsal surface. In color of abdomen the 

 specimen reminds me of a female specimen sent me by Dr. Wm. A. 

 Nason, in which the abdomen had the color and markings of the 

 male. Structurally the specimen is identical with domestica although 

 it has, to be sure, five dorso-central bristles behind the suture, but 



