Bibliographical Notices. 479 



mals and their rapidity of motion. The species he calls Typhlo- 

 dromus Pyri {figs. 1-6). For the lime-tree mite he proposes 

 the name of Flexipalpus Tilice (figs. 8-10) ; and he calls the 

 green species last described, Sannio ruhrioculus (figs. 11, 12). 



EXPLANATION OF PLATE XIV. 



Fig. \. Larva of Typhlodromus Pyri. 



Fig. 2. Foot of the larva. 



Fig. 3. Rostrum of the larva. 



Fig. 4. Typhlodromus Pyri, 



Fig. 5. Its rostrum, with the antennal jaws. 



Fig. 6. Half-developed Typhlodromus. 



Fig. 7. Larva of another species of Typhlodromus. 



Fig. 8. Larva of Flexipalpus TilicB. 



Fig. 9. Flexipalpus Tilice. 



Fig. 10. Foot of the larva. 



Fig. 11. Sannio rubrioculus, j'oung. 



Fig. 12. Sannio rubrioculus, mature. 



BIBLIOGRAPHICAL NOTICES. 



Manual of the Botany of the Northern United States. 2nd Edition. 

 By Asa Gray, Professor of Natural History in Harvard University. 

 ^ 8vo. New York, 1856. 



We had the pleasure, in the year 1848, of recommending to bota- 

 nists the first edition of this excellent work, which consists of a con- 

 densed account of the plants of the Union, from Maine to Virginia 

 and Kentucky, and from the Atlantic to the Mississippi. The Flora 

 included in the present edition is therefore more extensive than that 

 treated of in the former. Moreover, the whole book has undergone 

 careful revision, and in many cases is improved. 



It is unnecessaiy to enter much into detail concerning such a work 

 from the pen of such a w'riter, but a few remarks may be allowable. 

 Illecebrece and Sderanthaceee are combined with Caryophyllacece, 

 as seems most natural, although the latter order is removed by some 

 botanists to the neighbourhood of Chenopodiacece, its relationship to 

 which is not apparent. It seems probable that the Sagina procumbens 

 of the States differs from that of Europe, for the latter does not 

 inhabit " springy places," nor do the characters, as found in the 

 European and American Floras, accord in a satisfactory manner. 

 Spergularia is employed as the name of the genus called Lepiyonum 

 by Wahlenberg and others. The latter is the older name, as applied 

 geuerically ; for the supposed origin of the former with Persoon is 

 erroneous, he using it only to designate a section. We wish that 

 Dr. Gray was alone in this departure from the recognized laws of 

 nomenclature. We are sorry to see JNIoquin-Tandon followed in the 

 arrangement and nomenclature of the Chenopodiacece. Surely a less 

 natural combination than that of Chenopodium rubrum, C. bonus- 

 henricus, and their allies with Blitu?n could not easily be found ; also 

 that eminent French botanist is singvilarly inattentive to the law of 



