^NIGMATODES (?) REGULARTS. 71 



Genus iENIGMATODES, Handlirsch. 

 1906. Mnigmatodes, Handlirsch, Die Fossilen Insekten, p. 11<">. 



Generic characters as above. 

 JEnigmatodes (?) regularis, sp. nov. Plate IV, fig. 7; Text-figure 21. 



Type. — Fragmentary wing ; British Museum (no. In. 18,604). 



Horizon mid Locality. — Middle Coal Measures (over the Barnsley Thick Coal) ; 

 Monckton Main Colliery, Barnsley, Yorkshire. 



Specific Characters, — Radial sector, median, and cubital areas occupying 

 most of the wing, and all with well-spaced branches united by straight nervures, 

 except in the marginal area between the median and cubital veins where they 

 form a slight meshwork. Inner margin well rounded. 



Description. — Little more than half of this wing is preserved, and lies on a 

 fragment of hard grey bind associated with broken-up plant-remains. The 

 greatest length of the fragment is 42 mm., and the width 15 mm. The length 



Fig. 21. — Mnigmatodes (?) regularis, sp. nov.; diagram of neuration of wing-fragment, one-and-a-half 

 times natural size. — Coal Measures (over the Barnsley "Thick" coal); Monckton Main Colliery, 

 Bai-nsley, Yorkshire. Brit. Mus. (no. In. 18,604). Lettering as in Text-figure 16. p. 62. 



of the complete wing was probably 50 — 00 mm., and the width 18 — 20 mm. The 

 outer margin is missing, and of the subcosta and radius only portions of the basal 

 third are present. These are separated by a narrow area crossed by short trans- 

 verse nervures. 



In the distal third of the wing is the innermost branch of the radial sector, 

 which ends on the margin in a small fork. The line of fracture of the wing has 

 closely followed the line of the radial sector, and a portion of another branch of 

 the radial sector may have been present along the line of the extreme broken edge 

 of the wing. The median vein sweeps in a convex curve to far out on the inner 

 margin, giving off two well-spaced branches. The next two veins, one of which 

 forks, are more oblique in their course, and may also belong to the median, but 

 the basal curve rather indicates that these veins are cubital, as is the succeeding 

 vein, of which only a small portion is left. A trace of an anal vein is present near 

 the wing-margin. The interstitial neuration consists of well-marked transverse 

 nervures, regularly spaced in the outer parts of the wing, and uniting in a loose 



