588 Mr. C. L. Withycombe's Notes on 



have been seen feeding on Chionaspis salicis L. They can 

 be fed on red spider, and on pear trees larvae have been 

 found preying upon Bryohia praetiosa K., once on goose- 

 berry on the same mite. 



Enderlein (4) describes S. cvrtisiana End. as a species 

 distinct from S. aleurodiformis Steph., but I have already 

 shown this to be merely a variety (14). S. aleurodiformis 

 and curtisiana have both been bred, together v/itli inter- 

 mediate forms, from the eggs of one female. In nature 

 both forms occur together in approximately equal numbers. 



Parasemidalis annae Enderlein. 

 Wing expanse 5-6 mm. 



This species was first taken in June, 1922, at Oxshott 

 (14), it then being new to Britain. It somewhat resembles 

 Coniofteryx in size and form, but is decidedly blackish, 

 with a very sparse waxy coating. The media in hind- 

 wings is forked. Cross-vein from Cu^ to media strikes the 

 latter on the stem before fork point in both wings. 



The species occurs on conifers sparsely with C. pygmaea. 



Eggs (Plate XLIII, figs. 9 and 10) are laid attached by 

 their flat sides. They are of typical Coniopterygid pattern, 

 but rather short and broad. The micropylar cone is drawn 

 slightly upwards. Length -4 mm., colour white when laid. 



I have failed to rear, or even to find the larvae after 

 hatching. Fresh opportunities are hoped for next year. 



Helicoconis lutea Wallengren. 

 Wing expanse 8 mm. 



Although I have not taken this species personally, for 

 the sake of greater completeness a brief notice of the type 

 of larva may be of interest. 



The imago differs from all our other Coniopterygidae in 

 that it possesses paired eversible ventral sacs on abdominal 

 segments 1-5, there being also a rudimentar}'' pair on 

 segment 6 ; the external lobe of the maxilla is three- jointed 

 (one joint in Coniopteryginae) ; and the wing venation differs 

 in many respects. 



The species was first discovered in Britain in July 1915, 

 by J, W. H. Harrison (0), several specimens having been 

 taken on larch and birch at Wolsingham, Co. Durham. 



