234 FOSSIL INSECT WING, ORDER PARAMECOPTERA, 



define at once the new Order, and to describe the fossil wing 

 placed within it. A full discussion of its relationships will follow 

 this description. 



Order PARAMECOPTERA, ordo nova. 

 Fossil insects belonging to the Subclass Panorpoidea, and 

 having the same general venational scheme as those of the older 

 existing types within the Trichoptera and Lepidoptera, but with 

 a larger number of branches to both Rs and M. The posterior 

 arculus well developed, its connection with the cubitus being of 

 the same nature as in the Rhyacojihilidce and the Homoneurous 

 Lepidoptera. No separate costal vein. Rs dichotomously 

 branched, with at least seven separate branches on the wing- 

 margin. M dichotomously branched, with five separate branches 

 on the wing-margin. Cu three-branched (as in Megaloptera, 

 Trichoptera, and Lepidoptera). Cu 2 having an apical fork, while 

 Cu 2 is a weak, concave, simple vein. Anal veins simple. System 

 of cross-veins the same as that of the older Trichoptera, with a 

 few additions; no development of regularly spaced cross-veins at 

 intervals, as in the true Mecoptera. 



Family BELMONTIID^ fam.nov. 

 Moderate-sized insects with fairly long and narrow wings. 

 Costal space narrow, with humeral cross-vein present. Both 

 radial and median cells closed. The dichotomy of R4 + 5 into R 4 

 and R 5 takes place very close to the first dichotomy of Rs into 

 R 2 -(-s and R44.5. Median fork at about two-fifths from base of 

 wing; three cross-veins between Rs and Mi + 2 or M^also a short 

 basal cross- vein from R to M, just distad from origin of posterior 

 arculus. 



Genus Belmontia, n.g. 

 (Plates xii.-xiii.; Text-figs. 1-3). 

 Forewing: — Subcosta forked distally, ending up at about half 

 the wing-length; costal space with two extra veinlets between the 

 humeral cross-vein and Scj. Rj connected with Rs by a single 

 cross-vein below end of Sc 2 . Radial cell irregular, elongate, six- 

 sided, the two most distal sides being the basal portion of R 3b 



