534 S. A. Roliwer — Three New Fossil Insects. 



the following differences will be noted : The subeosta is at a 

 greater distance from the stigma. The apex of the stigma 

 is concave. There are fewer cross- veins in the costal 

 area. The cross-vein between the snbcosta and the radius is 

 not interstitial with a cross-vein of the costal area. The cells 

 below the stigma are shorter. The cell bounded above and 

 below by R x and R 5 ( == RS) is pentagonal not hexagonal. 



Of all the fossil species it seems nearest to Inocellia tumulata 

 Scudder, but it differs from that species in having a cross-vein 

 in the stigma; the cell below the stigma reaches beyond the 

 middle of the stigma ; the space between the subeosta and the 

 costa is transversed by a number of cross-veins. 



Habitat : The Tertiary shales of Florissant, Colorado, col- 

 lected in 1908 by George JN. Rohwer at Station 14. Type in 

 the collection of the University of Colorado. 



The following table of the fore wings of certain species, 

 both fossil and recent (the recent ones are starred), is interest- 

 ing in that it shows the relation of the fossil and recent faunae ; 

 and useful in that it separates the species of fossil Rapliidia 

 found at Florissant. As Dr. Scudder has given a table of the 

 species of Inocellia they are not included. 



Subeosta joining the costa at the base of the stigma notata* 



Subeosta joining the costa remote from the stigma 1 



1. Stigma without a cross-vein _ Inocellia 



Stigma with at least one cross-vein .., 2 



2. R x with but one branch beyond the stigma 3 



R^ with two branches beyond the stigma 6 



3. The costal area very small and apparently without 



cross-veins ; the subeosta forming most of the mar- 

 gin of the wing ; stigma "small, semi-oval" JR. (?) tranquilla 

 The costal area not small and with distinct cross-veins 4 



4. The first cell below the stigma not extending beyond 



the stigma It. mortua 



The first cell below the stigma extending beyond it 5 



5. The cell bounded by R 2 and R 5 ( = RS) pentagonal 



JR. rhodopica* 

 The above mentioned cell hexagonal E. oblita* 



6. R 3 not forked ; length of the anterior wing 12 ram B. exhumata 

 R 3 forked; the anterior wing 14 mm ._ Megaraphidia elegans \ 



Chrysis miocenica n. sp. 



Female : length of the thorax, 6 mm ; length of the head, 2 mm ; 



length of the abdomen, 8 mm ; length of the anterior wing, 7'5 mm , 



f For further differences between R. exhumata and M. elegans see Bull- 

 Am. Mus. Nat. Hist., 1909, p. 73. In the figure of M. elegans (Bull. Am. 

 Mus. Nat. Hist., 1907, p. 607) the artist has omitted the costal area, and has 

 drawn ~R X incorrectly, with one instead of two branches beyond the ptero- 

 stigma. The cross- vein below the stigma is too far from the end of the 

 latter.— t. d. a. c. 



X 



