APHTHOROBLATTINA JOHNSON!. 



97 



Horizon and Locality. Middle Coal Measures (binds between the " Brooch " 

 and " Thick " coals) ; Coseleyj Staffs. 



Specific Characters.- Tegmina slightly convex and expanded towards the apex, 

 about two-and-a-quarter times as long as wide. Apex broadly rounded. Costal 

 area occupying three-fourths of the outer margin of the wing. Subcostal vein 

 weak. Radius almost straight and giving off the radial sector about the middle of 

 its length. Radial sector doubly furcate. Median vein widely spaced across the 

 middle of the wing. Cubital vein reaching the inner angle of the wing-apex, 

 giving off outer and inner branches. Anal area large, and crossed by a few small 

 anal veins. Hind- wings thin, larger than the tegrnina, and with strong veins. 



Description. The elucidation of the neuration of the wings of the type 

 specimen is difficult, owing to the venation of the hind-wings being impressed 



FIG. 30. Fm. 31. 



PIG. 30. Aphthoroblattina johnsoni (Woodward) ; diagram of venation of the two fore-wings of the 



type-specimen, twice natural size. Middle Coal Measures (binds between " Brooch " and " Thick " 



coals) ; Coseley, Staffordshire. Johnson Collection, Brit. Mus. (no. I. 1067). 

 FIG. 31. Aphthoroblattina johnsoni (Woodward) ; diagram of venation of the fore-wings of a normal 



example of the type-series, twice natural size. Same horizon and locality as Fig. 30. 



W. Egginton's Collection, " no. 2." 



on that of the tegmina. The veins of the hind-wings are stronger than the 

 distal portions of those veins of the tegmina which they overlie. It is probably 

 owing to these factors that the original figures of the type are incorrect. 



In both tegmina, as indicated by Dr. Woodward, the median and cubitus are 

 shown as united, whereas this union takes place in the left wing only. Neither 

 of the figures gives an adequate indication of the presence of the hind-wings. 

 In the larger figure the radius and cubitus are represented by a single vein, 

 which is also incorrect. Allusion has already been made to the wings lying on 

 the smaller portion of the nodule in an inverted position. This is demonstrated 

 by the pronotum, which dips under the mesonotum into the matrix, and by the 

 deep impressions of the veins of the hind-wings crossing over, and not under, 

 the veins of the tegmina. The veins of the tegmina are also in relief, instead 

 of being sunken as they normally are on the dorsal surface. 

 13 



