185 



Nos. 2, 3, & 6 are parasites of No. 1. Nos. 2, 3, 6, 7, 8, & 10 are 

 parasites of No. 5. Nos. 13, 14, & 15 are parasites of No. 12. 

 Nos. 13, 14, 19, & 20 are parasites of No. 18. 



The genus Polemon is allied to Geelinius, Nyl. 



Pleurotropis is a genus divided by Forester from Entedon. 



Pachifneuron formosum is afterwards mentioned with doubt as a 

 parasite of Lipara liicens, and is suggested as parasite on a Syrphus. 



The same author has observed, on Triticum repens, some swellings, 

 which he believes to have been formed by one of the Diptera, and he 

 has reared from them the following parasites : — 1. Fimpla graminellod, 

 Grav. 2. Isosoma graminicola, Griraud. 3. I. linearis, Wlk. And, 4. 

 I. sociahilis, Giraud. 



Ghlorops tarsata has been reared in abundance from the reed by 

 Mr. Winter, and Pteromalus spectahilis, discovered by him, is probably 

 identical with Pteromalus liparce ; he has also discovered on the reed 

 some other species, which I purpose mentioning in a future communi- 

 cation. 



Hyphidrus variegatus. — I possess a specimen of this insect, taken some years ago 

 by a yonng man of the name of Kay, who resided at Bury, near Manchester. It is 

 believed that he took it in Delamere Forest, where there are natural lakes, but of 

 this I cannot feel quite certain ; the fact is however doubtless, that he did take it 

 in Lancashire or Cheshire. — E. Brown, Burton-on-Ti-ent, bth December, 1864. 



•^4,* I have examined Mr. Brown's specimen, which must certainly be referred 

 to the H. variegatus of Aahe. In Stephens' Illustrations (Mand. ii., 45) and Manual 

 (64, 490), a species of the same name is recorded as British, the localities given 

 being Wimbledon Common and Epping Forest ; but the insects therein referred to 

 are H. ovatus, which varies slightly. 



Mr. Brown's specimen is rather larger than the ordinary examples of the latter, 

 and more rounded ; the head is black, with a broad triangular ferruginous space in 

 front ; the thorax ferruginous, with two black spots at the middle of the hinder 

 margin, confluent near the scutellum ; the elytra yellowish-ferruginous, with the 

 base near the scutellum, a small humeral spot, and two or three broad and exceed- 

 ingly irregular bands, black. 



It has been pinned twice ; originally, with the usual skewer of the period, 

 through the left elyti-on ; subsequently, by Mr. Brown, with a fine pin, through the 

 right elytron. 



According to Aube (Spec. Gen. des Hydroc, 466, 11), this species is found in 

 the meridional parts of Europe, and the North of Afi-ica. 



Fairmaire (Faun. Ent. Fr., ii., 196, 2), states it to be found in the south and 

 central parts of France, but to be very rare in the north ; also, that in one locality 

 (La Teste) it is taken in brackish waters. According to Redtenbacher (Faun. 

 Austr., 85), it was on one occasion found near Vienna, amd then not scarcely. — 

 E. C. Rye. 



