Entomological Society. 8219 



2. H. luteipes, Erichson. The specimens exhibited were presented to me by Mr. . 

 Wollaston, and were obtained at Whittlesea Mere. I have seen other specimens 

 found bj Dr. Power in the London district. 



3. H. intermedia, Thorns., Kraatz. The two specimens laid before the Society 

 were found at Purley Down, by Dr. Power. I have seen no other British examples 

 of the species. 



4. H. paralella, Mannerh. This appears to be a northern species. I have seen a 

 series of specimens forwarded to Mr. Douglas by Mr. Gregspn, of Liverpool, and 

 since specimens taken by Mr. Hislop in Scotland. 



5. H. subterranea, Mulsant. The only specimen which I possess is from Paisley, 

 and was given me by Mr. Morris Young. 



6. H. lepida, Kraatz. This also appears to he a northern species. I possess a 

 specimen from Scotland, for which I am indebted to Mr. Andrew Murray. 



7. H. palleola, Erichson. I exhibit two specimens of this insect, which were sent 

 me (with the above name attached) by Mr. Liunell, who finds the insect, I am 

 informed, in the neighbourhood of Reigate. The species, I have no doubt, is cor- 

 rectly determined." 



The Rev. Hamlet Clark exhibited specimens of four species of Hydroporus hitherto 

 undescribed, and stated that descriptions would be given in the forthcoming number 

 of the ' Journal of Entomology ;' one of them was taken in Spain, the other three in 

 Great Britain : they were — 



1. Hydroporus Andalusiae, very nearly allied to H.Clarkii, Woll. (which was taken 

 in the Canaries) ; captured by Mr. Gray and Mr. Clark near Malaga, in May, 1856. 



2. H.severus, allied to H.assimilis, Payk.,AXii more closely to H.fuscitarsis, Aube ; 

 taken by Dr. Ernest Adams in a small river near Stowmarket, and by Mr. Clark in a 

 running stream near Horning Fen, in May, 1855. 



3. H. derelictus, allied to H. planus, F., and H. erythrocephalus, L. ; received 

 from the Orkneys in August, 1855. 



4. H. celatus, closely resembling H. vitiula, Er., and H. incertus, Aube ; taken 

 by Dr. Power in a stream in Bradgate Park, Leicestershire, in August, 1855, and in 

 a stream at Black Park, Uxbridge, in August, 1856, and by Mr. Brewer in a stream 

 in Tilgate Forest. 



Mr. Clark also exhibited Hydroporus 5-lineatus, Zetl., hitherto unrecorded as 

 British, but which had been taken several years ago by Mr. Waterhouse, probably in 

 the London district. 



Mr. Lubbock exhibited specimens of a small Hymenopterous insect swimming in 

 water by means of their wings ; the specimens were taken with a net in a pond near 

 Mr. Lubbock's residence in Kent, and had been recognized by Mr. Walker as Poly- 

 nema fuscipes, of the family Proctotrupidae. The fore wings were large, and profusely 

 fringed all round ; the hind wings small and very narrow : in the general appearance 

 of the insect there was nothing to suggest the probability of an aquatic habit : the 

 motion through the water did not appear to be in any way assisted by the legs, but 

 was due to the sharp jerking action of the wings. The insects were able to remain 

 three or four hours beneath the water, but required occasionally to swim to the sur- 

 face, or crawl thither up the stem of an aquatic plant, in order to breathe; so, at least, 

 it was to be inferred from the fact that specimens which had been confined for a whole 

 night, in such a manner as to be unable to reach the surface, were all found dead in 

 the morning. Mr. Lubbock had never seen the insect fly, but of the other species of 



