60 C. H. TYLER TOWNSEND, 



14. TabaiiU!4 alratu)« F. 



Constaiitine, Mich., August 26 ; one male. Washington, D. C, 

 May to September, one female and two males. One of the males 

 has the first posterior cell closed, and another has it nearly closed. 

 None have yellowish hind margins to wings. 



1.-). Ta bail lis exul O. S. 



Dixie Landing, Va., four females, July 6-13 ; Washington, D. C, 

 two females and one male, June 30 to August 4. These specimens 

 all agree well in coloring with Osten Sacken's description, in Part II 

 of Prodrome, of the original T. abdominalis with the first posterior 

 cell closed. The male and three of the females have the first poste- 

 rior cell well open, but moderately coarctate ; two other females have 

 it narrowly open and strongly coarctate ; while the remaining female 

 has it very narrowly oj^en, almost closed, in the left wing ; but like 

 the preceding in the right wing. These s])ecimens, agreeing so closely 

 otherwise and showing such variation in the first posterior cell, seem 

 to indicate that the latter character is of little importance even in 

 separating varieties. There seems to be no difference among the 

 female specimens in the width of the front, which is moderately wide. 

 Length 19-22 mm. 



It is interesting to note that the females of this species are very 

 numerous in July on the small steam tug-boats that run on the 

 Potomac from Washington up to Dixie Landing. They alight on 

 all parts of the boat while in mid-river. 



16. Tabaiius exiil var. or n. sj). 



Riley County, Kansas (F. Marlatt , June. One female, 18 mm. 

 long, differs in having a narrower front, the first posterior cell wide 

 open, the third antennal joint black except extreme base, form not 

 so stout and thorax appearing narrower, abdomen and legs brick- 

 brown, and median triangles very faint, Avith grayish instead of yel- 

 lowish hairs among the black hairs on abdomen. The hind tibite 

 are less noticeably sub-ciliate, the yellowish gray pile of underside 

 of head and thorax less plain, frontal callosity oval and pointed 

 above, where it sends out the spindle-shaped prolongation. This 

 seems to be a distinct species. 



17. Tabanus piiuctifer O. Sack. 



Fort Selden, Dona Ana County, N. Mex. ; one female, June 13. 

 La Vega de San Jose, Valencia County, New Mexico ; two females, 

 August 4. Chaves, N. Mex. ; one male, August 6. One female { Au- 

 gust 4) is without the clouded spot at base of second posterior cell. 



