THE PALEONTOLOGICAL DATA 



97 



The only one from the Anthracite Region of the United States is 

 Metropator ptisillus (Fig. 87), from the Lower Lykens series, near Altamont 



Fig. 88. — Paolia vetusta (After Handlirsch). 



ColHery, Pennsylvania. In this wing, the radial sector corresponds closely 

 with the hypothetical type except that it bears two accessory veins, one 

 each on veins R2 and R3. 



Of about the same age as Metropator are two fossils from Indiana and 

 one from Alabama. The best preserved of these three is Paolia vetusta 

 (Fig. 88), from the Mansfield formation, near French Lick, Indiana. That 

 this is a very generalized insect is shown by the fact that the spaces between 

 the veins were filled with an irregular network of veins; definite cross- veins 

 had not yet been attained. In this wing the radial sector is dichotomously 

 branched. Veins Ro and R3 coalesce nearly to the margin of the wing ; and 

 vein R3 bears an accessory vein. 



There is also an accessory vein on , —Trr~' N. S*^ 



vein R4. 



A second species from the same 

 formation is Paolia Gurleyi (Fig. 89) . 

 The radial sector of this is also 

 dichotomously branched. It differs 



from that of the preceding species Yig. Sg.-Paolia Gurleyi (After Handlirsch). 



in a slightly different distribution 



of the accessory veins, there being two on vein R3 and none on vein R4. 



The Alabama species, which is believed to be nearly contemporaneous 

 with the two first described, is Campteroneura reticulata (Fig. 90) . This is a 

 fragment of a wing from the Mary Lee group, Cordova, Alabama. This 

 fragment includes only a part of the anal area and perhaps a part of the 

 cubital area ; it throws no light on the branching of the radial sector. 



Another fragment of a wing from Alabama is supposed to be of a slightly 

 more recent time; this is Bathytaptus falcipennis (Fig. 91), of the Pratt 

 group, Coalbury near Birmingham. This is a more specialized wing than 

 either of those described above; definite cross- veins had been attained. 

 In this wing the radial sector is clearly typical with the addition of two 

 accessory veins on vein R2. 



