The Scottish Naturalist. 27 



C. costdla. — Frequent but local. May be beaten off birch at the 

 higher altitudes in July. It varies considerably in the size and 

 brilliancy of the costal streak. 



C xylostclla {harpella). — Not uncommon. May be easily bred 

 from honeysuckle in spring. Does not vary. 



Dcpressaria costosa. — Common, particularly at the higher alti- 

 tudes, wliere the furze is most abundant. August, &c. 



D. liturella. — Locally common. The larva may be taken full 

 fed in the rolled-up leaves of Centaurea nigra at the end of May 

 and beginning of June, and the. imago .on the flowers in the 

 evening and after dark with a lantern in August. 



D. umbellana. — Common in the same localities as costosa, in 

 August, &c. 



D. assimilclla. — Common among broom in the month of 

 June. 



D. arenella. — Common in autumn among thistles and knap- 

 weed. 



D. ajigelicelia. — To be taken also in several localities in August. 



B. ci}iifloiiella. — Mr. Herd has taken this insect on Moncreiffe 

 Hill. I have never met with it. 



D. applajia. — Abundant everywhere. I have taken this insect, 

 as also costosa and unibellana, in February and March, frequent- 

 ing the Cupressi in the evenings. 



D. ciliella. — I have beaten this insect from thatch in winter. 



D. pulcherrimella. — I have only one specimen, captured in 

 August in front of my house. As, however, the food-plant is 

 common, I presume I have overlooked it, although I have failed 

 to notice the larvae at work. 



D. nervosa. — The larvae are common in the stems of CEnanthe 

 crocata, and emerge in August in the imago state. 



D. heracliana. — The same as £>. nervosa, except that the 

 food-plant is Heraclium sphondylium. 



TEE NATURAL HISTOEY OF THE GALL-MAKING 



OYNIPIDH. 



ABOUT a year and a half ago, we briefly noticed (Sc. Nat., 

 IV. p. 117) the curious and interesting discovery of an 

 alternation of generations in the gall-making Cynipidae made by 

 Dr Adler of Schleswig. Mr Peter Cameron subsequently pub- 

 Hshed a paper (Sc. Nat., IV. p. 152) entitled ''Does Alternation 



