Insects. 5049 



3. H. minutus, Dej. Apparently more rare than either of the pre- 

 ceding species. Stephens gives as localities Aberystwith, Southend. 



I have occasionally found the insects of this genus on the surface 

 of, but more frequently beneath, the mud. The entomologist, when 

 searching for them, will look out for little holes, the entrances to their 

 burrows, and, if possible, on mud which has become firm, at least on 

 the surface. Let him then, with his knife, peel off some of this drier 

 surface, and examine it carefully for their mines. By following them 

 up he will meet with the insects, if they are to be found in the loca- 

 lity. They seldom mine below an inch in depth from the surface. 



Genus Georyssus. 



] . G. pygmaeus, Fab. This species, the sole English representa- 

 tive of the family Georyssidae, is allied to the Parnidae and Heteroce- 

 ridae. " Southend," by Mr. Waterhouse ; damp places near London ; 

 " in Suffolk and Norfolk ;" and " in the Annan, near Moffat ;" are the 

 principal recorded localities. 



Genus Parnus. 



1. P. prolefericornis, Fab. Common everywhere, under rejecta- 

 menta, at the roots of wet grass. 



2. P. auriculatus, Illig. I have seldom met with this distinct spe- 

 cies. Wandsworth Common ; Kimpton ; Marton ; Pentland Hills. 



3. P. Dumerilii, Latr. So far as I am aware, this insect has not 

 been taken for several years in England. " Banks of Wandle," 

 "Garrett Green," "in Yorkshire," "banks of the Trent," are the 

 recorded localities. I am indebted to Mr. Janson for my example, 

 which was taken, many years ago, near Dorking, by Pelerin, who sup- 

 plied the principal London cabinets with the species. 



Genus Elmis. 



1. E. Volkmari, Panz. This handsome, large species is not 

 uncommon, and is widely distributed. 



2. E. variabilis, Leach. Not rare in the northern counties ; taken 

 in profusion, by Dr. Power, near Wallington ; North Wales; Carlisle ; 

 common in one of the deep lakes of Mull. 



3. E. lacustris, Steph. Allied to, but apparently distinct from, the 

 previous species. Tt is to be noticed that while E. variabilis, Leach, 

 is taken only or principally in the northern counties, E. lacustris, 

 Steph., has its metropolis in the southern. I have never been so 



XIV. R 



