Manchester Meuioirs, Vol. Ixi. (igi/), No. % ij 



The median vein follows a course fairly parallel to that 

 of the radius, and m the portion of wing preserved, gives off 

 an inwardly directed branch, which soon divides by forking 

 into two equal twigs. The divisions of the radius and median 

 together occupy the whole of the wing apex. 



The cubitus is an important and well-developed vein. 

 Enough of it is present to show that its final divisions must 

 have occupied the whole of the inner wing margin outside the 

 anal area. The main stem of the cubitus curves inwards, des- 

 cending low down towards the inner margin, and then con- 

 tinuing towards the wing apex. It gives off on its inner side, 

 a series of long twigs, wliich pass obliquely inwards to the 

 wing margin. Of these, all shown on the wing fragment are 

 simple and undivided except the first, which gives off three 

 short divisions on its inner side. The anal furrow is well 

 marked, and forms an almost complete semi-circle. Seven 

 anal veins are distinguishable, the second and third being forked 

 in the middle of their length. 



The inner margin is almost straight. The intercalary 

 venation consists of a fine reticulation, with a tendency to a 

 transverse arrangement between the veins. 



Hind wings. — Both left and right hind wings are very 

 fragmentary. As contrasted with the tegmina, they are ex- 

 tremely thin and membraneous, so that the general wing struc- 

 ture outside the veins is not readily determinable. The two 

 wings are not alike, the left wing fragment being best pre- 

 served, and the largest. 



Left hind iving. — The costal margin is straight. The sub- 

 costal is a feeble vein, giving off a few twigs, which pass out 

 obliquely to the costal margin. It lies somewhat close to the 

 latter, so that the costal area is narrowly strap-shaped. The 

 radius is a strong vein arising close to the sub-costal, and pass- 

 ing straight outwards. Just before reaching the end of the 

 wing fragment, it forks into two branches, both of which again 

 fork. There can be no doubt from the direction in which the 

 main stem continues, but that other divisions of the radius 

 arose further out. The radial sector arises from the radius 

 near its base,' and passes obliquely inwards, diverging some- 

 what widely from it. Four twigs are shown arising outwardly 

 from it, the first of which forks twice. 



The median divides near its base into two unequal 

 branches, the outermost of which remains simple for a good 

 portion of its length, forking into two twigs on the broken edge 

 of the wing. The inner branch, by repeated forking, gives rise 

 to live twigs. 



The cubitus follows a straight course towards the distal 

 end of the inner wing margin. On its outer side, a single twig 

 is given off, whilst on the inner side, six twigs arise at regular 

 intervals, the third one of the series forking. The next two 



