102 [October, 



jointed antennae are inerassated 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. 

 fecwiAatrix. 



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., 2, 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. moniliatus, Hart., in Grerm. Zeits., 3, p. 192. 



Eight other species of Andricus are briefly indicated by Hartig, 

 several of which might be found in this country. 



(To be continued.) 



ADDITIONS, &c., TO THE BEITISH TENTHREDINIDjE. 

 BY B. m'laCHLAN, T.L.S. 



Having undertaken, with the assistance of Mr. F. Smith, to work 

 out the British saw-flies for the general Catalogue purposed to be pub- 



