168 HAL 



32. History and Transformations of Corydalus cornutus. Amer. 

 Acad. Art. Sci. 1848, 4. pi. 



33. History of Phalangopsis, a genus of Orthoptera, with three 

 new species, two of which form a subgenus. Am. Assoc. 184-9, 

 p. 346. 



34. On the Larva of Physoccelus inflatus. Am. Assoc. 1849, 

 p. &47. 



35. On four new species of Hemiptera of the genera Ploiaria, 

 Chermes, and Aleurodes ; and two new Hymenoptera parasitic in 

 the last- named genus. Am. J. Sci. 1850, IX. pp. 108-111. 



36. On the occurrence of a large species of Filaria (F. lycoscp, 

 Iconogr. Encyc. p. 48) in a species of Lycosa. Proc. Am. Phil. 

 Soc. 1847, IV. p. 356. 



37. Report on the Progress of Entomology in the United States du- 

 ring the year 1849. Proc. Acad. Philad. V. p. 5. 



38. On Apus affinis, a new species from the Hauaian (Sandwich) 

 Islands. Emmons Am. J. 1847> p. 192, fig. 



39. Clepsina scabra, a new species. Monogr. Univ. Moll. No. 1. 



40. On two new species of Tubifex observed at Pittsburg. J. Acad. 

 Philad. 1842, VIII. p. 331. 



41. On Hydrolimax, a new genus of Parenchymatous Worms. 

 Proc. Acad. Philad. I. p. 166. 



42. On Planaria gracilis, a new species. Supp. to Monogr. No. 1 , 

 1840. 



43. On Cercaria hyalocauda and bilineata, the former parasitic upon 

 Physa heterostropfta, and the latter upon Limnea catascopium. 

 Monogr. No. 1, and Supp. 1840. 



44. On Scolithus linearis, a new genus and species of Fossil Plant, 

 the most ancient organic remain in Pennsylvania. Supp. to 

 Monogr. 1840. Hall's Palaeontology of New York, I. p. 2, fig. 



45. On ^Eonia ebonina, a new species of Trilobites. Emmons' 

 Am. J. Oct. 1847, p. 191. 



46. Report on the supposed identity of Atops trilineatus, Emmons, 

 with Triarthrus Beckii, made to the Am. Assoc. 1847. Sill. Am. 

 J. ser. 2, V. p. 107. 



47. On a perfect American specimen ofPfiacops Hausmanni. Am. 

 Assoc. 1848. 



48. Anatomical examination of Salamandra erythronota and S. ci- 

 nerea, showing them to be distinct species. Proc. Acad. Philad. 

 III. p. 315. 



49. On several Fishes of the Susquehanna. J. Acad. Philad. VIII. 

 p. 330. Supp. to Monogr. (Cottus viscosus). 



50. On some Facts in Ornithology. Proc. Acad. Philad. I. p. 54. 



51. On the Insects of Mexico. Sill. Am. J. ser. 2, V. p. 435. 



52. Proposal to substitute the name Hypodon for Diodon, as a 

 genus of Cetacea. Proc. Acad. Philad. I. p. 127. Other pro- 

 posed substitutions. Id. I. p. 188; and in Entomology. Id. 

 1842, p. 191. 



53. Sketch of the Natural History (including Geology) of Lan- 

 caster County, Pennsylvania, 1844 (Appendix to a History of the 

 County). 



