ON T^NIOPTERYX PUTATA. 83 



afforded, yet Newman's description can hardly refer to anything 

 else than to my earlier T. trifasciata. The locality, New Lanark, 

 refers no doubt to the Eiver Clyde, near that place. The banks 

 of this river, which were my favourite hunting-grounds for 

 many years, produces in early spring two species of Tcenio- 

 'pteryx, both of which have short-winged males, but the reference 

 to the moniliform antennae can apply to my trifasciata alone. 



The British species of Tceniopteryx are three in number, viz. 

 piitata, Newman, risi, Morton, and nehulosa, Linne. 



Little needs to be said about the last-named, which is 

 separable from the others at a glance. Klapalek has placed it 

 in a separate genus, Nephelopteryx. If the two genera are 

 adopted, they may be distinguished thus : — 



Cubitus of the fore wings emitting two to four branches 

 outwards to the hind margin. Ventral plate {lamina 

 suhgenitalis) of the male long . . . Tmiiopteryx, Pict. 

 Cubitus of the fore wings emitting but one branch out- 

 wards to the hind margin. Ventral plate of the male 

 short ....... Nephelopteryx, Klap. 



In British examples of nehulosa the male, as has been 

 indicated, has frequently very much abbreviated wings, but not 

 always so ; specimens occasionally appear almost as full-winged 

 as Continental examples. Mr. Martin E. Mosely recently sent 

 me one from Dovedale in full-winged condition. It may be that 

 micropterism is more dominant in the North, but it is probably 

 not confined to that quarter. When the wings are full in the 

 male, it of course approaches in appearance to the female. The 

 shortest-winged males are very remarkable, sprawling creatures, 

 the legs appearing to be out of all proportion to the size of the 

 insect. The short-winged forms seem to have the apical pro- 

 cess of the valvida suhanalis shorter than is usual in the long- 

 winged condition (see fig. 7), but there is no very striking diffe- 

 rence, and there may be a certain amount of individual variation. 

 The short-winged male of nehulosa may also be separated from 

 the male of putata by the moniliform antennae of the latter. 

 The wing-markings in nehulosa are usually very vague, and I 

 cannot say that I have ever seen a female example with such 

 distinct fasciate markings in the wings as are shown in Albarda's 

 figure ('Annales de la Soc. Ent. Belg.' xxxiii. pi. i.). T. nehu- 

 losa appears very early, from February to April, according to 

 locahty and season, and it seems to last but a short time. 



The two other species, T. risi and T. putata, present no 

 difficulty in determination. The latter, as a rule, occurs earlier 

 than risi, but risi may be found as early as April along with 

 the others, while it continues to appear in higher districts even 

 to July. 



The differences between the two species may be tabulated 

 thus : — 



g2 



