218 Professor Trail on the [sess. lii, 



COLEOPTERA. 



CcutJioi'rhynchus sulcicollis, Gyll., on flowers of Erysimum 

 hieracifolium, at Christiania (galls roots of various 

 species of Brassica). 



C. contractus, Marsham, on flowers at Christiania (reared from 

 galls on roots of Brassica Sinapistrum, in Britain). 



Gymnetron Linarice, Panzer, at Christiania (galls roots of 

 Linaria vulgaris). 



G. noctis, Herbst., on flowers of Linaria vulgaris, at Chris- 

 tiania and at Drammen (larva lives in slightly deformed 

 ovaries of Linaria vulgaris). 



Hymenopteea. 



Nematus Salkis-cinerew, Eetz (sub nom. N. cinerco:, De Geer), 

 at Christiania and at Troms0 (produces pea-galls on 

 willows, see above). 



N. gallicola, Westw. (sub nom. N. Vallisnicri, Hart.), at 

 Christiania (produces oblong galls in the leaves of 

 various willows, projecting from both surfaces). 



N. Solid s-pc lit andr 03, Eetz. (sub nom. N. picntandrcc, De Geer), 

 at Christiania (produces woody swellings on the twigs 

 of various willows, especially on S. 2icntandra). 



N. clolichurus, Thomson, taken at Fokstuen, in Dovre (prob- 

 ably makes galls on one or more of the alpine 

 Nvillows). 



Hemipteha. 



Livia juncorum, Latr., on various flowers, especially on Com- 

 positse, at Christiania (galls young shoots of Juncus com- 

 munis). 



Schizoneura Ulmi, Linn., on Ulmus campcstris, near Chris- 

 tiania (causes the leaves to become fleshy, and to form 

 wide tubes, in which the Aphides live). 



Tetrav^ura Ulmi, De Geer, on leaves of Ulmus campcstris, 

 near Christiania (the galls are oval bodies, about 12 

 by 6 mm., rising from the upper surface of the leaf, to 

 which they are attached by a narrow pedicle ; the 

 Aphides live in the large central cavity). 



I^emphigus hursarius, Linn., on Populus pyra^nidcdis, neai' 

 Christiania (produces flask-shaped galls, about 12 mm. 

 in height, on the petioles ; an opening at the upper 

 end leads into the cavity occupied l)y the Aphides). 



