Vol. 67.] PROM THE SOUTH WALES COALFIELD. 169 



outer being simple and forking once far forward, after which the 

 branches curve gently backwards and then outwards to the margin. 

 The inner ramus gives origin to three branches, the first and third 

 being forked, the central simple and unbranched. The veins follow 

 a similar course to those of the outer ramus. 



The anal area has been broken away along the line of the anal 

 furrow, the latter passing in an open curve from a little below the 

 middle of the base of the wing outwards to the margin, which it 

 reaches a little below the middle line. 



Affinities. — The distinguishing feature of this wing is the 

 basal branching of all the veins with the exception of the median, 

 and the width of the area occupied by them at their origin. 

 Usually, in the blattoid wing, the chief veins arise as nearly as 

 possible in contact with one another ; or else two or more may have 

 a common stem. In this case they are well separated, and are 

 spread over nearly a third of the wing-base. Another feature of 

 unusual character is presented by the wide interspaces between the 

 veins in the middle of the wing. These wide interspaces are well seen 

 between the lower ends of the branches of the radius, the wide 

 interval between the main stem of the latter vein and that of the 

 media, and again between the latter in the middle of its length and 

 the outer branch of the cubitus. While this open spacing is a 

 distinctive character of Handlirsch's family Spiloblattinidge, it is 

 not confined to that group ; and, as it is accompanied in the present 

 instance by a markedly triangular sub-costal area, in place of a 

 strap-shaped one, it cannot be assigned to any genus of that family. 

 It may be noted, however, that in general form, and in wide inter- 

 spaces, it agrees with the genus Atactoblatta. Believing that the 

 character and the mode of branching of the veins furnish the 

 most reliable evidences of relationship, I am of opinion that the 

 relationships of this form must be sought for among the members 

 of the family Mylacridae of Scudder. Within this family Dr. Hand- 

 lirsch constituted a new genus Orthomylacris, with the definition of 

 which the specimen closely agrees. His definition is as follows : — 



'Front wing two to two and a third times as long as broad, of subcordate 

 outline. Costal area extending one-half to two-thirds the length of the wing. 

 Radius continuing to the apical border, with a variously largenumber of offshoots 

 branching forward. The superior branch either simple or forked, more rarely 

 strongly compound. Media with few veins directed obliquely backward to the 

 apical and inner borders. Cubitus never continuing to the apical margin, 

 with few branches. Anal area very long, at least twice as long as high, and 

 extending two-fifths to one-half the length of the wing, with numerous more 

 or less compound veins. Structure leathery, more or less distinctly cross- 

 wrinkled.' (Proc. U.S. Nat. Mus. vol. xxix, 1906, p. 768.) 



Only a very few somewhat oblique cross-wrinkles can be detected 

 upon the specimen on the inner side of the apex. Elsewhere the 

 wing-structure is smooth or somewhat granular, the granularity 

 being perhaps due to the impress of the material in which the wing 

 lies embedded. The surface of the wing is flatly and regularly 



