CHIONASPIS SALICTS. 183 



spine-like, are arranged in three pairs, and followed 

 by a group of four or five others. 



Long. 1 1*25 mm. 



Immature female at period of fecundation (PL XIX, 

 fig. 5) short ovate, slightly narrowed behind ; seg- 

 mentation faint. Colour dull orange-yellow ; margin 

 of pygidium bright reddish crimson. At this stage 

 the puparium is narrowly pyriform (PL XIX, fig. 3), 

 and consists chiefly of the exuviae of the second- stage 

 female, which are of a dull madder-brown, covered by a 

 thin white secretion. Larval exuviae pale yellowish 

 brown. 



Puparium of the male (PL XIX, figs. 6, 7) white, 

 strongly tricarinate ; larval exuviae as in the female. 



Long. "50 1 mm. 



Winged male (PL XIX, fig. 9) dark crimson, orange- 

 crimson, or bright orange-red; antennae and legs 

 bright yellow. Stylus glassy and longer than abdo- 

 men. Apodema, a little paler than the rest of the 

 body, is not at all conspicuous. Wings hyaline. 



Apterous male (PL XIX, fig. 8) coloured, as the 

 winged form, from which it differs only in the absence 

 of wings and halters. 



Larva and ova dull reddish crimson. 



Habitat. Abundant on alder (Alnu-s glutinosa), 

 willow (Salix, spp.), and ash (Fraxinus excelsior), 

 throughout Cheshire, and in many parts of North 

 Wales. Common also near Leeds, Gloucester, and at 

 Stratford-on-Avon (Hodges), London district (Dr. 

 Wiltshire and Mr. Nicholson) ; in Norfolk, near King's 

 Lynn, and Briston; in Kent, at Bearsted (Green), and 

 near Orpington. In the last district I found this in- 

 sect a much more general feeder than I had anticipated. 

 In the roadside hedges it was abundant on Ulmus 

 campestris, Euomjmus europseus, Viburnum lantana, and 

 Acer campestre. On the first-named plant I could, for 

 long time, only detect the male puparia, which were 

 conspicuous by their numbers ; but by a careful 

 examination of the branches with a lens the female 



