SOOMYLACRIS BURRI. 131 



The median forks equally twice, the inner of the four twigs again forking twice 

 into three. 



The cubitus is a simpler structure than that of 8. deanensis. It consists of a 

 sigmoidally curved main stem giving off five inward branches, the first and third 

 only forking. The cubitus, therefore, ends on the inner margin in eight twigs, 

 that of 8. deanensis in eleven. 



The anal area of the right tegmen is superficially much like that of S. deanensis, 

 but the first anal vein gives off three branches in place of two, the innermost 

 forking. In 8. deanensis the middle branch forks. The second vein forks twice, 

 that of 8. deanensis being undivided ; the third forks once into two twigs, that of 

 S. deanensis having three ; the fourth forks once, the fifth is undivided, and the 

 sixth forks twice into three twigs. Traces of a seventh vein are present. Portions 

 of the anal area are shown near the inner margin, and above the outer edge of the 

 anal area of the right wing, but they are too fragmentary to determine the course 

 of the veins. 



YIQ. 41 Soomylacris stocki, sp. nov. ; diagram of venation of two tegmina, twice natural size. Coal 

 Measures ; Crump Meadow, Forest of Dean, Glos. U.S. National Museum, Washington (.Lacoe 

 Coll., no. H. 2132 c ; Nat. Mus. no. 38090). 



The inner margin is almost straight, and owing to the greater convexity of the 

 outer margin, the wing appears to have been narrower apically than S. deanensis. 



The interstitial neuration is similar to that of 8. deanensis. Traces of possibly 

 one of the hind- wings can be seen underneath the costal margin and under the 

 outer twigs of the radius. The wing is closely related to that of 8. deanensis, but 

 the differences, especially in the cubitus, are sufficient to distinguish the two. 



Soomylacris burri, Bolton. Plate IX, fig. 4 ; Text-figure 42. 



1912. Soomylacris (Etoblattina) burri, Bolton, Quart. Journ. Geol. Soc., vol. Ixviii, p. 318, pi. xxxm, 

 figs. 1, 2. 



Tt/pe.Lett tegmen ; Museum of the Kent Coal Concessions Co., Dover. 



Horizon and Locality. Coal Measures (dark shale from a depth of 1208 feet) ; 

 Barfreston Boring, Kent. 



Specific Characters. Subcosta with few divisions. Radius with well-marked 

 radial sector, which is well developed and much divided. Median with two main 



