136 NEUROTEEDS LJ1VIUSOULIS. 



and thorax shining, vertex distinctly aciculated, mesonotum finely 

 aciculated at the sides and indistinctly in the centre, which is strongly 

 shining. Abdomen compressed laterally, subovate, elongated. Wings 

 hyaline, immaculate. 

 Length 2 — 3 mm. 



The coloration of the legs is variable, some speci- 

 mens having a greater amount of yellow on the tibiae 

 and femora than others. The subovate abdomen, 

 which is longer than the head and thorax together, 

 shining thorax, brownish legs, and immaculate wings 

 serve to distinguish it from lenticularis and numismatis. 



Gall. — In shape irregularly circular, often more or 

 less incised, flat, bare, without stellate hairs ; the colour 

 green, greenish-yellow, or reddish ; the sides some- 

 times raised or curled, the centre with a distinct small 

 knob, this being sometimes surrounded by hairs. It 

 is found on the under side of the leaf, and never occurs 

 in great numbers on one leaf. Length 4 mm. 



From both lenticularis and fumipennis this gall is to 

 be usually recognised by the surface being bare or but 

 very sparsely haired. On the average it is smaller 

 than lenticularis, from which it differs in the very 

 distinct, clearly defined central knob, that of lenticu- 

 laris not being anything so distinct. It is larger than 

 fumipennis, and it is seldom that its border is so 

 clearly curled up as in that form. 



Inquiline. — Synergus Tschelci in April. 



Parasites. — Torymus sodalis, T. hibemans. 



Sexual Form. — Black, smooth, shining; the basal four or five joints 

 of antennae yellow, the rest often brownish or brownish-yellow, espe- 

 cially at the apex and on the under side ; legs whitish-yellow, the coxaa, 

 the greater part of femora, and sometimes the tibias brownish, seldom 

 entirely whitish-yellow ; ovipositor testaceous ; wings hyaline, imma- 

 culate ; nervures fuscous or pallid. 



The (^ has a trace of aciculation on the mesonotum ; the third joint 

 of the antennas but slightly curved, the petiole generally short, other- 

 wise as in 5 . 



Length 1 — 1 - 7 mm. 



The smallest species, and easily known by the hya- 

 line wings and white legs, more or less darkened on 

 the coxae and femora. 



Gall.. — Found on the edges of the leaves, the part 



