COSELIA PALMIFORMIS. 81 



Family CoskuijiJ':, nova. 



A group of large-winged insects in which the principal veins are openly 

 spaced ; the radial sector joined by an outer branch of the median, and the median 

 sending a strong inward commissure to the cubitus. 



The family shows relationships with the (Edischiidse, Omaliidae, and ( 'acurgida?. 



Genus COSELIA, novum. 



Generic Characters. —Costa, and subcosta feeble, intercostal area very wide ; 

 radius straight ; radial sector arising near middle of wing. Cubitus S-shaped, 

 its branches occupying most of the inner margin of the wing. Interstitial 

 neuration of transverse nervures uniting in some areas to form an open 

 meshwork. 



Coselia palmiformis, so. nov. Plate V, tig. 3 ; Text-figure 25. 



Type. — Basal half of a left wing in counterpart in an ironstone nodule ; British 

 Museum (Johnson Collection, no. I. 15893). 



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

 and " Thick " coals) ; Coseley, near Dudley, Staffs. 



Specific Characters. — Subcosta united to radius basally, giving off numerous 

 branches, united by irregular cross-nervures, to the outer margin. Radius strong, 

 divergent from subcosta. Radial sector diverging from the radius. Median 

 steadily divergent from radius and radial sector, and giving off an inner branch in 

 the first third of the wing to the main stem of the cubitus. Beyond the middle of 

 the wing, the median sending off several outer branches, the first uniting with the 

 radial sector. Cubitus with its divisions extending over the greater portion of the 

 inner margin of the wing. First anal vein strongly curved, the next thrice forked. 



Description. — This species is represented by a little over the basal half of 

 a left wing, 54 mm. long and 26 mm. wide, showing the under surface only. The 

 outer or costal margin is convex and very thin. The costal area very wide at its 

 base (6 mm.) and diminishing towards the wing-apex. 



The subcosta is a feeble vein, apparently united basally to the radius, and 

 passing outwards in a straight line towards the distal end of the outer margin, 

 or into the outer part of the wing-apex. It gives off numerous branches to the 

 outer margin, the branches being disposed regularly, and inclining apically in 

 their course. They are joined by a few irregular cross-nervures, most of which 

 are at right-angles to the branches of the subcosta. 



The radius arises with an inward curve near the point at which the subcosta 

 is given off, diverging from it and following a straight line to the wing-apex. 

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