102 [October, 
jointed antennse are incrassated towards the apex, and have the first 
five joints testaceous, the rest fuscous. The longitudinal bands of the 
mesothorax are more obscure. Scutellum black. Abdomen fuscescent 
beneath and at the apex. 
Common on oaks, being, according to Hartig, an inquiline of G. 
fecundatrix. 
Andricus noduli, Hart. 
Black ; antennae at the base, abdomen, and legs, rufescent ; apex 
of the abdomen, and base of the posterior coxae, black : hinder tibiae 
fuscous, the tarsi pale ; ? . — The ^ is similar, but the antennae are 
hardly darker at the apex. Long. | ; alar. exp. If lin. 
Var. 1. Mesothorax with traces of three testaceous stripes at 
the back. 
Var. 2. Legs entirely testaceous. 
A. noduli, Hart., in Germ. Zeits., 3, p. 191 ; 3, p. 337. 
This species, according to Hartig, inhabits the young twigs of the 
oak, causing them to become distorted and loaded with excrescences. 
A twig one inch in length produced 30 flies, each issuing from a 
separate excrescence. It is common in England. 
Andricus moniliatus, Hart. 
Black ; squamulae and legs ferruginous, hinder coxae black at the 
base ; hinder tibiae sub-fuscous. Antennae moniliform. ^ . 
This is the whole of Hartig's description. I have four specimens 
which correspond to it, as far as it goes, but the only tangible character 
consists in the moniliform, or sub-moniliform antennae. These are 15- 
jointed, having the four basal joints testaceous. Mesothorax glabrous, 
black, narrower than the head ; sutures of the parapsides faintly marked. 
Scutellum black, hemispherical, sub-rugulose. Abdomen much shorter 
and narrower than the thorax, black, shining, narrowly testaceous at 
the base. Legs testaceous ; tips of the tarsi, and the hinder tibiae, 
pale fuscous. ^ . Long. \ — | ; alar. exp. 2 — 2i lin. 
A. moniliafus, Hart., in Germ. Zeits., 2, p. 192. 
Eight other species of Andricus are briefly indicated by Hartig, 
several of which might be found in this country. 
CTo be continued.) 
ADDITIONS, &c., TO THE BEITISH TENTHREDINID.^. 
BY E. m'lACHLAN, F.L.S. 
Having undertaken, with the assistance of Mr. E. Smith, to work 
out the British saw-flies for the general Catalogue purposed to be pub- 
