296 ENTOMOLOGICAL NEWS [Julj) 'l3 



femora with a row of large erect bristles on the upper side as in 

 Hyetodesia leucorum; costa densely beset with very short black bris- 

 tles ; auxiliary vein reaching costa about 1600 /^ from base of wing, 

 running close to first vein for about 1215 1^-, then rapidly leaving it, 

 but the bend not very abrupt; first vein not especially thickened, reach- 

 ing costa about 480 ^ beyond end of auxiliary ; second vein little arch- 

 ed, it and the third ending as in Lasiops spiniger; anterior cross-vein 

 about 830 from end of discal cell, and about 1040 from its base ; 

 outer side of discal cell quite straight ; fourth vein beyond the discal 

 cell gently arched upwards, and then near the end with a short curve 

 downwards. 



Miocene shales of Florissant, Colorado, Station 13 (W. P. 

 Cockerell). I cannot make out the squamae, but after close 

 study and comparisons (especially with Cordyluridae) I am 

 satisfied that this is a genuine Anthomyiid, the first to be 

 described from Florissant. It is hardly possible to place it in 

 a modern restricted genus, the characters used as generic be- 

 ing in large part invisible. 



Scudder described two flies assigned to Anthomyia from the 

 tertiary strata at Quesnel, British Columbia ; these may be 

 separated from A. atavcUa as follows: 

 Apical side of discal cell about as long as its side on first posterior (as 



in Lasiops, Hyetodesia. and most modern forms) A. burgessi Scudd. 

 Apical side of discal cell much shorter than its side on first posterior 



(a ScatophagaAike characters) i 



I. Wing 4.25 mm. long; at level of end of discal cell, first posterior 



twice as wide as submarginal cell {Hyetodesia approaches this) 



A. atavella Ckll. 

 Wing 6.2 mm. long; at level of end of discal cell, first posterior not 



much wider than submarginal (as in Homalomyia) 



A. iiianimata Scudd. 



In all these American fossils the upper apical corner of the 

 discal cell is practically a right angle, as in Lasiops and Homa- 

 lomyia; in the three species described as Anthomyia by Heer 

 from Europe (Radoboj) this angle is very acute, as in Ham- 

 momyia and Hydro phoria. Is it possible that this difference 

 distinguishes the American and Palaearctic Anthomyidae of 

 mid-tertiary times, one set of genera having evolved during 

 the Eocene or earlier in America, the other in the Old World? 

 To-day, of course, the two series are inextricably mixed in the 

 northern faunae. 



