90 ANDEIOUS COLLAEIS. 



Gall. — Found in the terminal or lateral leaf-buds, 

 hidden as a rule by the scales, so that only the apex is 

 visible. Hard, woody, conical or oval, sometimes 

 almost roundish ; smooth, the apex narrowed to a 

 point, forming a blunt cone surrounded by a zone 

 differently coloured from the rest of the gall, being 

 usually brownish at the extreme apex, the rest being 

 yellowish. 



Schenck (1. c.) says that the galls remain in the bud 

 after the larvae have come to maturity ; but I believe 

 that it is only those galls tenanted by the inquilines 

 which stick to the buds, those frequented by the host 

 falling to the ground. The flies come out in April of 

 the second year, remaining thus eighteen months in 

 the gall. 



The inquilines are Synergus nervosus, and, according 

 to Schlectendal, S. E. Z., 1870, 341, 8. pallipes (pro- 

 bably a variety of 8. Ts chela). 



The same author bred Eurytoma verticillata, Nees, 

 from the galls. Brischke records Syntomaspis cau- 

 datus as a parasite. 



Sexual Form. — Black, shining, the base of the antennae pale ; the legs 

 testaceous ; the coxae at base, the base of the four anterior femora, and 

 the posterior, except at the apex, blackish or brownish; wings clear 

 hyaline, shining ; the mesonotum impunctate or only punctured at the 

 sides ; the mesopleurae shining, impunctate ; pronotum transversely 

 striolate; the scutellum rugulose. Antennae thickened towards the 

 apex, the twelfth and thirteenth joints not much longer than broad. 



The c? is similar, has the antennae lighter in tint, and with the third 

 antennal joint curved and thickened a little. 



Length 1| — 2 mm. 



Gall. — Forms irregular swellings on young aborted 

 leaves, or on the sides of more or less developed 

 leaves. At first they are hard and solid, but with 

 growth they expand and form a large internal cavity 

 of a more or less circular form, inside of which is the 

 brownish egg-shaped inner gall loose. In colour they 

 are always green, like the young leaves. Sometimes 

 they form terminal swellings which become hard and 

 bark-like externally, from which twigs and leaves may 



