162 Cincinnati Society of JVatural History. 



mandibles, b}' which it is scraped, after the manner suggested b}' Mr. 

 Wood, and alluded to, ante p. 46. I confess though, that I do not un- 

 derstand how the tongue can be brought between the mandibles. That 

 these bees (Andrenidce) do take nectar from flowers is certain, however, 

 both from seeing them in the act of probing for it, and from seeing it 

 flow to and fro the pharynx and the tongue through the mentum. And 

 although there is in the Andrenidw no membraneous sack in the lingua? 

 as there is in the Apidce — at least none that can be made to protrude 

 from thehaiiy sheath — and though the sheath is firmh' attached to the 

 tubular rod throughout its entire length, its hairs adhering to the rod 

 so as to greatly obscure it, and probably give rise to erroneous interpre- 

 tations of its character: yet the peculiar glands and organ which are 

 found in the mentum and basal parts of the trophi of the Aiyidce, and 

 which are most probably connected with the elaboration of hone}', are 

 found more or less modified in the Andrenidce ; and indeed in the trophi 

 of all of the aculeate Hymenoptera that I have examined. These 

 organs are very pretty and peculiar structures, and their investigation 

 will amply repay an}^ of our microscopists who are looking for " fresh 

 fields and pastures new." The field, however, is not strictly new, 

 though comparatively untrodden, as, since the publication of the paper 

 to which this note is additional, I have leai-ned from Dr. Hagen, that 

 Wolff" and Fritz Miiller have each been before me in demonstrating the 

 tubular character of a bee's tongue, the former in Apis, and the 

 latter in Melipona. The last edition of the Encyclopcedia Britannica 

 (art. Bee), however, persists in the error that a bee's tongue is not 

 tubular, but is solid. 



DESCRIPTION OF A NEW FA3IILY AND GENUS OF 



LOWER SILURIAN CRUSTACEA. 



By a. G. Wetherby. 



[Read before the Cincinnati Society of Natural History, November 5, 1878.] 

 In the American Journal of Science and Arts, Vol. III. (3d series), 

 p. 423, 1872, Prof. Meek published the description of a new fossil 

 from the Lower Silurian rocks at Cincinnati, based upon two speci- 

 mens found by Prof. G. W. Harper, of this citv. One of these is now 

 in the collection of Mr. C. B. Dyer, and the other in the Yale College 

 museum. It was some years before further examples of this remark- 

 able fossil came to light, but another specimen was finally discovered 

 by Mr. Geo. Vallandigham, which is now in the collection of S. A. 

 Miller, Esq., and still another, by Mr. W. J. Patterson (Plate I., fig. 

 5) now in his collection. These two specimens show few features in 



