314 IfiiniUirsch — JVeio Paleozoic Insects from the 



Gerarus collar is, new species. Fig. 18. 



This form seems to be very nearly related to G. longus 

 Handlirseh and may possibly be but a variety of this species. 

 The anterior wings have a length of 52 mm . Subcosta strongly 

 shortened, extending only a little distance in the apical half of 

 the wing and provided with numerous oblique veinlets very 

 regularly arranged. Radial sector differing somewhat in both 

 fore wings ; with 5 branches in the right, the first of which 

 forms a short apical fork, the second and third trichotomous, 

 the fourth and fifth dichotomous ; and with 6 branches in the 

 left wing, the third of these being trichotomous, the fourth 

 and fifth simple, the sixth forked. Media cleft into a long 

 fork, the branches of which fork again. Cubitus strongly 

 reduced, probably with not more than 1 or 2 branches. Sec- 

 tor, media and cubitus very close together near the base. 

 Prothorax bottle-shaped, without tubercles, more than twice as 

 long as broad at the base. 



Holotype in Peabody Museum, Yale University, Cat. No. 34. 



Gerarus (?) reductus, new species. Figs. 19, 20. 



As only fragments of the positive and negative of the right 

 anterior wing and of the left anterior and posterior wing are 

 preserved, I cannot be positive on the point of the generic 



Fig. 19. 



Fig. 19. Gerarus reductus (negative of two left wings), x 2 - 2. 



determination of this fossil. The total length of the wing 

 may have surpassed 40 mm , the breadth about 12 mm . Costal 

 margin gently curved, subcosta shortened, cross veins of the 

 costal area forming a network near the base, elsewhere far 

 remote, simple and oblique. Radial sector rising very near 

 the base, not very far removed from the radius and provided 

 with about 6 very regular simple branches directed obliquely 

 backward and outward. The media is cleft near the origin of 

 the sector into 2 main branches, the anterior of these forming 

 a large fork, the posterior cleft no farther. There are to be 

 seen but two branches of the cubitus, the anterior of which is 



