208 THE ENTOMOLOGIST. 



several described species from Florissant, Scudder's statement 

 cannot be taken as positive evidence that he had any Mydaidae 

 at all, and up to the present time there has been nothing definite 

 on the palaeontology of the family. It is therefore with con- 

 siderable pleasure that I recognize a veritable Mydaid among 

 some materials gathered by one of the University of Colorado 

 expeditions. 



My das miocenicus, n. sp. 

 Eepresented by a wing lacking the apex, which was probably 

 about 12 mm. long, the breadth (depth) being a little over 4 mm. ; 

 hyaline, with a broad dusky suffusion along the veins, as in some of 

 the living forms ; there is especially a fuscous cloud at the end of 

 the discal cell. I cannot see anything in the venation which does 

 not accord excellently with the modern genus My das. Compared 

 with the wing of M. vittatus, as figured by Verrill (' British Flies,' 

 v. p. 607), the following differences are apparent : — 



(1) Alula is broader and less produced. 



(2) End of anal cell is more distant (about 560 microns) from 



margin of wing. 



(3) Apex of fourth posterior cell more produced and acute, its 



lower apical side (from divergence of upper branch of fifth 

 longitudinal vein to apex) 1010 microns long. 



(4) Discal cell on the combined second and third posteriors 



broader, the breadth 290 microns. 



(5) End of first basal cell rather broader, the breadth about 



320 microns. 



(6) Stump of vein projecting into submarginal cell from base of 



second submarginal longer, about 560 microns. 



The costa carries many short black bristles. 



M. miocenicus was found at Station 14, in the Miocene shales 

 of Florissant, Colorado, by Mr. Geo. N. Eohwer. 



According to Williston, the known living Mydaidse include 

 about a hundred species, especially found in Australia, Africa, 

 and South and Central America. Mydas occurs in New Mexico 

 and Arizona. 



NOTES ON THE OVA OF LEU CAN I A UNIPUNCTA 



(EXTRANEA). 



By R. Geoffbey Todd, F.E.S. 



1 was last year on the South Devonshire coast, and had the 

 good fortune to take two specimens of Leucania unipuncta 

 {extranea). A few notes on the ova of this uncommon migrant 

 may be of interest. 



The first specimen was taken at sugar on August 28th. It 

 was a female, and in hope of ova was placed in a tin containing 

 grass-heads and dead reed-stems, and fed with sugar and water. 

 It was very sluggish, and as it did not seem inclined to lay, it 



