342 THE CANADIAN ENTOMOLOGIST. 



I found Os?nylus requietus, Scudd., in the shale at Station 13. The 

 specimen agreed with Scudder's type, except that it was a little smaller, 

 the wings 14 mm. long instead of over 15. The insect differs conspicu- 

 ously from typical Osmylus in the characters mentioned by Scudder, and 

 may, I think, form the basis of a new genus Osmylidia. Whether the 

 species from Baltic amber should be considered strictly congeneric, I will 

 not venture to decide. In many of its characters this genus is closely 

 allied to the very much older Nyjjiphiies Craneri^ Haase, from the litho- 

 graphic stone of Bavaria; indeed, it may faiily be said that Osmylidia is 

 intermediate between Nymphites of the Jurassic, and Osmylus of the 

 present day. 



Osmylidia requieta (Scudd.) is, however, not the only Osmylid fossil 

 at Florissant. At Station BB, this year, my wife found a much larger 

 species, represented by a wing, of which enough is preserved to show the 

 generic characters. This wing is about 25 mm. long, with dark veins, 

 and dark spots very much like those of the living Osmylus chrysops. 

 Toward the apex, the costal region is irregularly and diffusely maculated ; 

 in the middle region of the wing there are two small round spots, the first 

 about 6, the second about 15 mm. from the base; toward the hind 

 margin, 10 mm. from the base^ is a rather larger spot. All of these spots 

 correspond with those existing in O. chrysops (anterior wing). As regards 

 the venation, many of the costal nervules are forked, exactly as in O. 

 chrysops ; the cross-nervures in the region of the media are numerous, as 

 in O. chrysops ; and, in short, the insect is a perfectly typical Osmylus, 

 closely related to the living species. The cross nervures between the 

 radius and radial sector are most of them heavily clouded ; the oblique 

 branches of the radial sector leave at approximately regular intervals ; the 

 costal area is perhaps not quite so full as in O. chrysops. This insect, 

 which proves that genuine Os?nylus onde inhabited the Rocky Mountains, 

 may be termed Osmylus Columhiaiius, n. sp. I take this opportunity to 

 add notes on two other Neuroptera. 

 (i) Hemerohius fiioestus, Banks, 1897 (not of Hagen, 1854, a fossil 



species), must be called H. bistrigaius, Curiie, 1904. 

 (2) Megaraphidia, Ckll. (fossil at Florissant). The characters of this 



genus are approached by the living Raphidia rhodopica, Klapalek, 



Trans. Ent. Soc. Lond., 1894. It is possible that Megaraphidia 



should be reduced to a subgenus. 



