154 



num amphibium, for such the plant proved to be, that the pink- 

 ish flowers grow in a dense head, from half an inch to two inches 

 long, barely rising on tolerably stout stems above the surface of 

 the water, where the oblong leaves float like lily pads. 



One naturally infers that the larvae infest the submerged 

 stems, the mature beetles leaving the water, like so many 

 other aquatic insects. The larvae of those European species, 

 of whose habits I have seen any notice, live in the stems and 

 roots of plants. I have never collected any other of our spe- 

 cies, and know nothing of their natural history. The habits of 

 Lixus rubellus, as mentioned herein, including its late appear- 

 ance, must account, I suppose, for the long disappearance from 

 our knowledge of a species which is probably really very com- 

 mon in its peculiar home. The description of Randall is quite 

 characteristic, and, so far as I am acquainted with our other 

 species, this is very easily distinguished. Frederick Blanchard. 



Lowell, 3fass., Feb. 1, 1876. 



On some Coleoptera from Florida. 



Hydroporus exiguus Aube\ which appears in Harold & Gem- 

 minger's Catalogue as Anodocliihis (Babington) exiguvs, with 

 A. maculatus Bab. as synonym, was unknown to Leconte in 

 his paper on North American Hydroporus (Proc. Acad. Nat. 

 Sci., 1855). In Leconte's list it appears as doubtfully belong- 

 ing to the North American fauna, and Crotch omitted it en- 

 tirely in his Revision of the Dytiscidae and in his Check List. 

 In the beginning of May, 1875, tins species was recovered by 

 Mr. H. G. Hubbard and myself, in the upper St. John River, 

 south of Lake Harney, several specimens having been found. 

 The characters given by Leconte, in his table (1. c), are suffi- 

 cient to recognize this very remarkable species. 



Hydnocera aegra Newm., distinct by its uniform red color, 

 occurs in several parts of Florida, although very rare. It is to 

 be found by sweeping the swampy meadows in the pine wood 

 lands, from March to June ; Temnopsoplius bimaculatus was 

 found always in company with it. 



Paehybrachys Umbatus Newm. [Cryjrtocephalus limbatus 



