32 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 59. 



Fig. 3.— Saegus vetus 



WING. 



Family STRATIOMYIIDAE. 



SARGUS (?) VETUS, new species. 



Plate 8, fig. 3. 

 Probable length not less than 10 mm., the apical part of abdomen 

 lost, the parts preserved measuring a little over 8 mm. ; wings fully 

 7 mm. long. Head, 3 mm. broad, with the hemispherical shape 



(seen from above) and large eyes of the 

 modern Sargus; occiput pallid; thorax, 3.4 

 mm. long and about 2.2 mm. broad (con- 

 siderably narrower than head), dorsally 

 dark, as far as scutellum (which is un- 

 armed), but apparently pallid at sides, 

 especially posteriorly; wings hyaline, with 

 only a faint cloud in the stigmatic region; venation difficult to 

 make out in detail, the accompanying figure may not be entirely 

 correct, but it shows what could apparently be seen; abdomen 

 pale, without markings, covered with fine short hair, the base at 

 least as broad as thorax, not at all contracted. The pallid sides of 

 thorax may be observed in some modern Stratiomyiidae, such as 

 Odontomyia truquii Bellardi, which I have taken at Roswell, New 

 Mexico, and have from Santa Clara County, California (Baker). 



Eocene ; White River, Colorado (U. S. G. S. 682) . This can not well 

 be separated from modern Sargus on the basis of the visible struc- 

 tures, but it very possibly represents an extinct genus, with perhaps 

 some characters of the Beridinae, suggested by certain details of the 

 venation. The generic name Sargus is to be used in preference to 

 Geosargus Bezzi, because Sargus Klein, supposed to preoccupy Sargus 

 Fabricius, was not binomial. 



Holotype— Cat. No. 66923, U.S.N.M. 



NEMOTELUS (?) EOCENICUS, new species. 



Only abdomen and wing preserved. Abdomen broad (4.2 mm. 

 wide), shaped as usual in Nemotelus and related genera, with lateral 

 cuneiform pale markings as 

 shown in the figure, quite in 

 the manner of modern forms. 

 Wing probably about 8 mm. 

 long (from base to end of discal 

 cell 5.2 mm.), hyaline, with the 

 strong veins dark. Venation as 

 in modern Nemotelus, so far as 

 visible, except that the fourth 

 vein before the discal cell is 

 distinctly arched (compare 

 Euparyplius and Rhapliiocera) . 

 Discal cell on first posterior 800 p. Other details are sufficiently indi- 

 cated in the figure. The anal cell is closed, and formed as in Nemotelus. 



|3«t-. cell. 



Fig. 4.— Nemotelus eocenicus. 

 part of wing. 



AnnOMEN AND 



