148 [December, 



14- articulate, the two last joints being connate. Ovipositor shorter 

 than in Cynips, at least as long as the abdomen. Scutellum short, broad, 

 and flattened above, not much overhanging or concealing the meta- 

 thoracic declivity. Wings as in Oynips, but the radial cell shorter and 

 broader. 



The genus is barely indicated in Hartig's " Uebersicht der Gat- 

 tungen." I can find nothing structural, except the palpi, to warrant 

 its separation from Cynips. 



Teras terminalis, T'ab. 

 Entirely testaceous, glabrous ; the abdomen more or less slightly 

 fuscescent above. Eyes black. Ocelli red. Antennae after the fourth 

 joint more or less fuscous. Tips of the tarsi fuscous. Wings hyaline, 

 with brown nervures ; the usual portions incrassated. Apterous speci- 

 mens occur. ^ $ . Long. | — 1^ : alar. exp. 2 — 3| lin. 



G. terminalis, Eab. : Hart., in Germ. Zeits., 3, p. 193 ; 4, p. 407. 



The synonym G. ramuU, Lin., given by Hartig with a query, must 

 be struck out, see p. 8 of this volume, and cf. Dahlbom, Onychia och 

 Callaspidia, Tab. synopt. 2, sp. 45. The insect is well known, and its 

 gall — the oak-apple — still better. From May to August the imago 

 emerges in batches of 50 — 60 (each brood being of the same sex and 

 size) from the oak-apple. Sometimes a very minute oak-apple will 

 produce only one specimen. A curious account is given by Mr. Walker, 

 in the Zoologist (vol. iv., p. 1457), of parasites and casual insect 

 refugees* detected in a large mass of oak-apples collected at Southgate. 

 The list includes most of the orders of insects ; the number of the 

 Teras produced is estimated at 30,246, that of the interlopers at 24,417, 



CTo he continued.) 



A LIFE HISTOEY OF QBAOILABIA 8YRINGELLA. 

 BY CHARLES HEALT. 



Towards the end of the first week of May the imago of this little 

 garden pest generally makes its appearance, settling on, or flying over, 

 the lilac, privet, and ash. About a fortnight later, on examining the 

 under surface of the lilac, privet, and ash leaves, certain little whitish, 

 somewhat iridescent, blotches or undulating streaks are perceptible. 

 On closely examining one of these blotches by the aid of a lens, some 

 little oval-shaped elevations, which at first sight look like so many 

 bubbles, are observable, each of which, when placed under a microscope, 



[* See, also, Mr. C. G. Barrett's note in our present No., p. 153.— Eds,] 



