32 



FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



Genus HYPERMEGETHES, Handlirsch. 

 1906. Hypermegethes, Handlirsch, Proc. U.S. National Museum, vol. xxix, p. 672. 



Generic Characters. — Costal border feebly convex, subcosta and radius close 

 together along the greater part of their length. Cubitus composed of two. 

 possibly more, parallel ami simply forked branches, divided near the point of 

 origin. Anal veins few : interstitial neuration of fine, irregularly anastomosing 

 nervures. 



Hypermegethes northumbriae, Bolton. Plate I, fig. 4; Text-figure 3. 



l!'17. Hypermegethes northwmbrite, Bolton, Quart.. Journ. Greol. Soc, vol. lxxii p. 55, pi. iv, fi 

 and :!, and woodcut in text. 



Type. — Portion of the basal half of a left wing, in counterpart; British 

 Museum (no. In. 18524). 



Pig, 3. Hypermegethes northumbriae, Bolton; suggested outlineof Lef1 wing, restored, showing portion 

 preserved, slightly less than natural size. — Coal Measures (shale above the Crow Coal) ; Phoenix 

 Brickworks, Crawcrook, Durham. Brit. Mus. (no. In. is."i24 . 



Horizon and Locality. — Coal Measures (shale above the Crow Coal); Phoenix 

 Brickworks, Crawcrook, Durham. 



Specific Characters. — Costal area wide, and crossed by an irregular meshwork 

 of small veins. Median united with the radial sector basally. and giving off an 

 inner branch which unites with the cubitus. Cubitus with a short stem forking 

 into two equal and widely separated branches. Anal veins simple, and widely 

 spaced. 



Description. — The fragment is little more than a third of the whole wing, and 

 its characters can only be determined with difficulty. The two halves of the 

 nodule do not coincide, and the outline drawing of the wing is built up from 

 details supplied by both halves. The inner margin, anal area and base of the 

 wing have been lost, so that a little less than two-thirds of the outer portion of 

 the basal half of the wing is present. 



The portion of wing remaining being 63 mm. long, with a depth of 81 mm. at 

 its widest part, the whole wing must have had a length of about 126 mm., or 



