﻿THE ENTOMOLOGIST 



Vol. XLVIII.l DECEMBEE, 1915. [No. 631 



SOME CONIOPTEEYGID^ IN THE NORTH, WITH 

 A DESCRIPTION OF A SPECIES NEW TO THE 

 BRITISH ISLES. 



By J. W. H. Hakrison, B.Sc. 



I HAVE spent a considerable amount of time during the past 

 few years in the investigation of the more obscure groups of our 

 local flora and fauna, with very successful results. Amongst 

 the species taken is a Neuropteron, Conwentzia piyieticola 

 (Euderlein), allied to, but very distinct from, the common 

 C. 2}sociformis (Curtis) ; this species of Enderlein's is new to the 

 British list. 



I first took this insect from larches, between Ormeby and 

 Nunthorpe stations, badly victimised by Chermis laricis ; subse- 

 quently I procured the insects with hosts of Coniopteryx tinei- 

 formis (Curtis) from silver fir (Abies pectinata). In both cases 

 the insect occurred in considerable numbers and, what is 

 specially noteworthy, without a single Conwentzia psoaformis. 

 Further work in similar localities, both in North-east Yorkshire 

 and South-west Durham, has proved the insect to be widespread 

 with us, and to have a range of altitude from sea-level to nearly 

 1200 ft. ■ 



In Lonsdale, in Cleveland, at a height of 800 ft., the insect 

 was beaten from larch in a mixed alder and larch wood in 

 company with C. psociformis. From holly and many deciduous 

 trees, on the outskirts of the same wood, only C. psociformis was 

 obtained, but in large numbers. 



Coniopteryx tineiformis is very common throughout our area 

 in the lowlands, but thins out as one ascends. I have taken it 

 from elm at sea-level at Greatham, South Durham, and likewise 

 at a height of 800 ft. from birch and alder on Eslor Nab and 

 in Lonsdale (both in Cleveland), and even at a height approach- 

 ing 1200 ft. near Wolsingham, in Durham, from oak. In the 

 intervening tracts it occurs on many trees in greater or less 

 abundance. 



Semidalis aleurodiformis (Stephens) is everywhere rare here, 



ENTOM. — DECEMBER, 1915. 2 A 



