192 [January, 1S45. 



DONATIONS TO LIBRARY. 



Report of the Secretary of the Navy, communicating the re- 

 port of a board of examiners to make experimental trials 

 of plans and inventions for preventing explosions of steam 

 boilers. From Prof. Johnson. 



A report to the Navy Department of the U. S., on American 

 coals applicable to steam navigation and to other purposes. 

 By Walter R. Johnson, pp. 607. Washington, 1844. 

 From the Author. 



A communication from the American Philosophical So- 

 ciety was read, dated Dec. 6, 1844, acknowledging the receipt 

 of No. 5, Vol. 2, of the Proceedings. 



Mr. Haldeman exhibited specimens of the male and female, 

 and of the larva and pupa of Corydalus cornutus, and made 

 some remarks upon its habits and structure. The larva is 

 aquatic, but leaves the water and constructs a cavity beneath 

 a stone, in which it changes. The prothorax is much larger 

 in the larva than in the pupa and imago. The mandibles 

 and labrum are prominent at all stages ; the antennae very 

 small in the larva, and situated at the external base of the 

 mandibles. The male of the perfect insect is known by the 

 large arcuate mandibles, and both sexes present the re- 

 markable peculiarity of a vertical perforation through the 

 head, at the anterior base of the antennae. 



Stated Meeting, January 21, 1845. 

 Vice President Morton in the Chair. 



DONATIONS TO LIBRARY. 



Proceedings of the American Philosophical Society, Vol. 4, 

 No. 31, July to Dec. 1S44. From the Society. 



Esquisse d'une histoire de la Philosophic Chinoise : par G. 

 Pauthier. From the Author, through Mr. R. K. Haight. 



