78 FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



The wing-fragment must be referred to this provisional order in the absence of 

 knowledge of the whole wing-structure. The much-divided median vein is more 

 comparable with that of Germ/rum wilsoni, Matthew, than with that of Mixotermes 

 luganensis, Sterzel, and is also correlated with a shorter subcostal vein, although in 

 G. wilsoni that vein extends beyond the point at which the radial sector arises from 

 the radius. An open series of cross-nervures is present in both genera, as in this 

 specimen, and both have the same well-rounded apex. The wing-fragment is 

 suggestive of Hemeristia occidentalis, Dana, but has a less branched radial sector. 

 I provisionally refer it to Geroneura with the specific name of ovata. 



Order PROTORTHOPTERA, Handlirsch. 



190&. Handlirsch, Proc. U.S. National Museum, vol. xxix, p. 695, and Die Fossilen Insekten, p. 123. 

 1919. Handlirsch, Revision der Paliiozoischen Insekten, p. 28. 



Head large, with strong mouth-parts, and bearing long slender antennae ; 

 prothorax large and elongated, and the body strongly built. Legs either uniform 

 in character and fitted for running, or the hind-legs modified for leaping. Wings 

 more specialised than those of the Palaeodictyoptera, and capable of folding on the 

 abdomen when at rest, with the enlarged anal areas of the hind-wings doubled 

 under, owing to the formation of a fold between the anal area and the rest of the 

 wing. The principal veins and their subdivisions not so strongly curved inwardly 

 as in the Palasodictyoptera. 



Handlirsch established this order to include a series of insects intermediate in 

 character betAveen true Orthoptera and Palaeodictyoptera, to which Scudder had 

 previously given the name of Palasodictyoptera Neuropteroidea. 



Genus ^IDCEOPHASMA, Scudder. 



1885. JEdceophasma, Scudder, Geol. Mag. [3], vol. ii, p. 205. 



Generic Characters. — Large wings two-and-a-half times as long as wide; inner 

 margin more convex than outer margin, and curving distally into the latter. 

 Principal veins broad and flat in the basal third, and diminishing in size distally. 

 Subcosta and radius reaching the wing-apex. Median vein with two main 

 branches, the outer with most subdivisions. Cubitus with two main branches, each 

 much subdivided. Anal veins numerous. Interstitial neuration of irregular 

 nervures, and a loose meshwork in the wider areas. 



.aSdceophasma anglica, Scudder. Plate V, fig. 2 ; Text-figure 24. 



1885. JEdoeojJn^iim anglica, Scudder, Geoh Mag. [3], vol. ii, p. 265, and in Zittel's Handbuch der 

 Palaeontologie, vol. ii, p. 758, tig. 941. 



