BY R. .1. TILLYARD. 



605 



Section ix. The Venation of the Paramecoptera. 

 (Plate xxxi., figs. 15, 16, and Text-fig. 63.) 



This Order is only represented at present by a single genus, 

 Belmontia, from the Upper Permian of Belmont, near New- 

 castle, N.S.W. Text-fig. 63 shows the restored forewing of this 

 insect. The actual specimen has about 0.5 mm. of the extreme 

 base, including the jugal lobe, missing, and a small piece of the 

 tip of the wing broken off obliquely. There is, therefore, no 

 difficulty in completing the venation with certainty. 



As this fossil has already been fully described by me in a 



icv 

 Cut \™fjOy 



lev 



Sc, Sc 2 R la R 1t 



Text-Fig.63. 

 Forewing of Belmontia mitchelli Till. (Order Paramecoptera, Upper 

 Permian), restored, (x 5) Lettering as on p. 535. Note the com- 

 plete cubito-median Y-vein. 



former paper (29), it will only be necessary here to refer to 

 that work, and to indicate the principal points in which Belmontia 

 differs from the true Mecoptera, as well as those in which it 

 is of importance in indicating the lines of descent of some of 

 the still existing Orders of the Complex. 



Belmontia differs from all true Mecoptera in the following 

 points : — 



(1) Cv.i is forked distally into Cu la and Cu lb . 



(2) The forking of R 4 . 5 takes place exceedingly close to the 

 origin of that vein. 



(3) The cross-vein system is reduced to a definite plan, which 

 resembles fairly closely that of the Trichoptera, Lepidoptera and 

 Diptera, though still possessing a number of cross-veins not 

 found in these Orders. 



