ANDRIOUS CIRRATUS. 97 



12. ANDRIOUS CIRRATUS. 



PI. VI, figs. 1 (Cirratus) and 1 a (Callidoma) gall ; 

 PL XV, fig. 8. 



Cynips callidoma, Thorns., Opusc. Ent., 784 (?). 



Aphilothrix callidoma, Adler, xxxv, 182, pi. x, fig. 11 ; Licht. 



Cyn., 41, pi. i, fig. 11. 

 Andricus cirratus, Adler, 1. c, 182, pi. x, fig. 11 a ; Mayr, 

 Europ. Cyn., 19 and 28 ; Licht. Cyn., 42, 

 pi. i, fig. 11 a. 

 — callidoma, Mayr, Europ. Cyn., 19, 21, and 28. 



The agamic form is not to be recognised from the same form of 

 A. quadrilineatus (see p. 95). 



The remarkable gall of this insect issues from a 

 leaf -bud (usually from small twigs), and occurs be- 

 tween June and October. It differs from all other 

 galls in having a long peduncle at either end, the 

 basal being the larger, and is, when normally deve- 

 loped, longer than the gall itself, the apical peduncle 

 being much shorter, the longest I have seen not being 

 much more than half the length of the gall. The gall 

 proper is elongated, fusiform, broadly or sharply 

 rounded at the ends ; the surface generally smooth, 

 glabrous when mature ; the colour green or whitish- 

 green, sometimes with reddish longitudinal stripes, 

 and some examples are longitudinally furrowed. The 

 galls rarely hang downwards, usually they stand 

 out obliquely from the buds. 



The galls containing the makers fall to the ground 

 when ripe, but those with inquilines remain attached ; 

 while, again, these latter vary considerably in shape, 

 and have the peduncles very short or absent entirely. 



The largest gall I have seen has the basal peduncle 

 12, the gall 8, and the apical peduncle 5 mm. in length. 



Malpighi (Opera Omnia, t. i, p. 122, fig. 44) figures 

 a similar gall to this, but it may be the callidoma of 

 Griraud (Verh. z.-b. Ges. Wien, p. 348), which differs 

 from Adler's species in having the surface of the 

 gall " couverte d'une pubescence tres apparent, 



vol. iv. 7 



