66 FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



apparently being a branch of that vein, while the median and the cubital areas ar< 

 occupied by numerous veins whose origins are not indicated. 



The differences between Lameereites curvipennis and this specimen are considei 

 able. The balance of evidence is greatly in favour of an affinity with Brodia pru 

 cotincta, and the specimen may represent a nymph or larval stage of that species. 



It is undesirable to attach a specific name to immature wings agreeing 

 closely with a known species. I propose to regard it as B. prisc.otimta, fori) 

 juvenis. 



Brodia furcata, Handlirsch. Plate III, figs. 7, 8; Text-figure 19. 

 1919. Brodia furcata, Handlirsch, Revision der Palaozoischen Insekteu, p. 75, fig. 89. 



Type. A left wing and impression showing the under-surface ; British Museui 

 (no. I. 2962). 



Horizon and Locality. Middle Coal Measures (above-, the "Brooch" Coal) 

 Dudley and Coseley, Staffs. 



FIG. 19. Brodia furcata, Handlirsch ; showing forking of the second branch of the median into two 

 equal twigs, natural size. Coal Measures (clay ironstone nodule from binds between the " Brooch " 

 and "Thick" coals) ; Coseley, Staffordshire. Brit. Mus. (no. I. 2962). 



Specific Characters. Radial sector reduced in area, and possibly with thret 

 branches. Median having the second branch dividing into two equal twigs, both 

 of which reach the margin. Median area enlarged. 



Description. This wing differs so much from the type-form as to be worthy of 

 specific distinction. Its total length is 44 mm. and the greatest width 12'5 mm. 

 The base of the wing is much more nearly complete than usual, and very narrow 

 (5 mm.) for a short distance, beyond which it widens by the development of the 

 strong convex inner margin. The wing shows the usual plication, which fortu- 

 nately is not continued into its base, so that the course of the veins in the latter 

 is not obscured, as is so often the case in P>. priscotincta. The outer or costal 

 margin forms an almost straight line, and bears a double row of spinules; those at 

 the base of the wing pointing inwards. No basal hump, as in /?. priscotincta, is 

 shown. The subcosta is widely spaced from the outer margin proximally. The 

 radius and radial sector present no special features, and but one inward branch is 

 present. Whether four branches arose from the main stem, as in the type-species, 

 cannot be determined owing to the loss of the apical portion of the wing. It is 

 doubtful if such was the case, as the portion missing is not great. The outer three 

 branches of the radial sector are usually 10 12 mm. apart, so that if the wing 



