SYNOPSIS OP GALLS. 29 



67 (68) Not spindle-shaped ; the base dilated ; covered with white 



silky depressed hair ; the larval chamber separated from 

 the bottom by a hollow space. And. glandulae. 



68 (65) Glabrous. 



69 (72) Spindle-shaped, with a more or less longish peduncle ; green, 



often with reddish lines. 



70 (71) The peduncle as long or nearly as long as the gall ; June — 



August. Length 7 — 12 mm. And. callidoma. 



71 (70) The peduncle very short ; October. 6—8 mm. 



And. Maljoighii. 



72 (69) The galls oval or oblong, or irregular. 



78 (78) The galls not at all enveloped in the leaf-buds. 



74 (75) The gall very small (about 1 — 2 mm.), ovoid, granular, 



green ; June. And. gemmatus. 



75 (74) The gall not small, oblong, longer than broad. 



76 (77) Green, spotted with white, the apex without a sharp point. 



Length 5 — 6 mm. ; May and June. And. albojaunctatus. 



77 (76) Not spotted with white, covered with short whitish hair ; 



finely rugose, often keeled, brownish-yellow, reddish when 

 young. And. Clementinse. 



78 (79) More or less enveloped in the leaf-buds. 



79 (80) The gall completely enveloped in greatly developed leaf- 



scales, forming a miniature artichoke-like body. Length 

 from 20 mm. And. fecundatrix. 



80 (79) The gall not completely enveloped in the leaf-scales. 



81 (82) Irregularly pea-shaped, thin-walled; green or yellowish- 



white ; in April or beginning of May ; not much enveloped 

 in the leaf -scales, not woody. And. aprilinus. 



82 (81) Globular or ovoid, tapering towards the apes, hard and 



woody, appearing in the autumn. 



83 (84) Globular, 3 — 4 mm., green and smooth when fresh, when old 



reticulated ; its apex only appearing out of the bud, blunt, 

 usually yellowish. And. glohuli. 



84 (83) Ovoid, the apex sharply pointed. 2 — 3 mm. 



85 (86) The apex with a distinct nipple-like point, of a darker colour 



than the rest of the gall. And. collaris. 



86 (85) The apex not ending in a dark nipple-like point. 



And. autumnalis. 



87 (88) The apex of a terminal twig inflated, the inflation longer 



than broad, the cavity large, containing a loose small 

 brownish inner gall. And. curvator and inflator. 



88 (89) The twigs or leafstalk, or the midrib inhabited by the larvae, 



which cause more or less perceptible irregular swellings. 



And. noduli. 



89 (94) On the roots. 



90 (91) Polythalamous, large, brown, irregular, from one to three 



inches in length. " And. radicis. 



91 (92) Monothalamous, situated on the rootlets, often in clusters, 



irregular in shape. Biorhiza aptera. 



92 (93) In the bark, on the thick roots, or on the trunk, where there 



is a wound, the gall sunk in ^the young wood, cup- 

 shaped, conical at apex, the top falling off when old. 



And. corticis. 



93 (92) A swelling on the trunk where a wound has been, not differ- 



ing from the root-galls. And. radicis. 



