THE CANADIAN ENTOMOLOGIST. 37 



NOTES ON COLEOPTERA.— No. 9. 



BY JOHN HAMILTON, M. D., ALLEGHENY, PA. 



FhUydrus, Can. Ent., XVI., 186. — The paragraph commencing with 

 " Philhydrus " should be corrected as follows : — Philydrus perplexus, 

 Lee, and P. Hami/toni, Horn, are found [on Brigantine Beach] in the 

 fresh water pools which form at the base of the sand-hills, with Hydro- 

 philus glaber and Copelatus glypkicus; while Phi/ydrus reflexipennis 

 occurs in the salt marshes under pieces of wood and recent tide-drift, 

 seeming to inhabit salt or very brackish water, as it has not been taken in 

 fresh water with the species mentioned. When the paragraph was 

 penned P. Hamiltoni, since described, was supposed to be reflexipennis^ 

 and the true reflexipennis a variety of ochraceiis. 



Philydrus fimbriatus. Can. Ent., XX., 63. — The variety noticed as 

 inhabiting hill and mountain rivulets has recently been described as a 

 species, and is Cymbiodyta Blanchardi, Horn. 



Cercyon iittoralis, Gyll. — This nice species occurred very abundantly 

 in September at Longport, near Atlantic City, New Jersey. It inhabits 

 under the softer grass washed from the Bay deposited on sand flats, and 

 which has remained there long enough for breeding purposes. Though 

 represented as very variable in colour and markings, the only differences 

 observed in several hundred individuals examined was that about one half 

 were entirely piceous black, while the remainder had the posterior fourth 

 of the elytra pallid. Cercyon has heretofore been much neglected by most 

 American collectors, but the genus having been recently monographed by 

 an able hand, and the species defined by characters usually of easy 

 observation, they are likely to become better known. All things con- 

 sidered, this species seems to be native in North Ahierica as well as in 

 Europe. Here it has been taken on Magdalen Island, Gulf of St. 

 Lawrence ; Coney Island, New York ; the New Jersey sea coast, and in 

 Illinois (Horn, monograph). In Europe, skirting the Western Mediter- 

 ranean shores, it follow the Atlantic Coast to N. Lat. 66° 50', and also 

 occurs in Northern Asia on the shores of the Obi. The Cercyons, so far 

 from being despicable, are very interesting beetles, and no genus of equal 

 extent contains so many forms common to the Old and New Worlds. 

 In fact, of the 25 American species monographed by Dr. Horn, 14 like- 

 wise occur in Europe. 



Trogophloeus convexulus, Lee. — Several examples (it occurred 

 abundantly) of this minute beetle were taken on the salt marshes near 



