S96 Messrs Murchison and Lycll o» the Tertiary 



Order OMOPTERA. 

 Fam. ApHiDiE. 



25. Aphis, of the middle size. 



20, 27. Obs. There are several small insects, some apterous, others with 

 very short wings, which I thought Thrips ; but the apex of the 

 abdomen is too obtuse for that group ; and, from the shortness of 

 their legs, they cannot, I think, be the larvje of any of the He- 

 miptera. 



Fam. Cercopidve. 



28. Tettigonia, exceedingly like T. spumaria, Linn. (Fig. 6.) 



29. Adraca? or it may belong to some of the neiglibouring genera, 

 Cixias, Delphax, or Cercopis (Fig. 5.) 



Order HEMIPTERA. 

 Fam. CoREiDiE. 



30. Miris, a small one. 



31. Lygceus, allied to /-. Abietis, Linn. 



32. Obs. There are many examples of different divisions of the Li/gai. 



33. Corixus, and cast not half the size of C. Ilyoscyami, Linn. 



Fam. PENTATOMIDiE. 



34. Cydnus, the size of C albotnarginatus. Fab. 



35. Pentatoma ? or it may be a Cydnm, the corners of the thorax being 



rounded : in form it resembles Tetyra, but it has a smaller scu- 

 telium. 



Order DIPTERA. 



Fam. TiruLiD^. 



36. Limnobia, female (Fig. 7.), allied to L. sexpunctaia., Fab., apparently 



fixed whilst at rest. 



37. Gnoriste ? (Fig. 8.), either struggling on its back, or in the attitude 



of depositing her eggs. 



38. Anotiier species, or the other sex of the former one. 



39. Mycetuphila? (Fig. 9.), walking, black, articulations of the body dis- 



tended by pressure. 



40. Mycetopliila ? a pale one. 



41. Nov. (Jen. (Fig. 10.), allied perhaps to Penthetria holosericea, Meig. ; 



but not being acquainted with the genus, I speak with uncer- 

 tainty. There are several examples of this insect : the one re- 

 presented seems to have been at rest ; the hinder legs are broken 

 off, and one of them is reversed, so that the tarsi nearly touch the 

 thigh. The palpi are long, and very perfect, and the antennae 

 are remarkably distinct. 



42. Nov. Gen. ? another species, or the other sex of the last. 



43. Bihio, male, and cast, allied to B. venosus, Meig. 



44. Several specimens of a genus between Bibio and Beris. 



Fam. STRATIONIDiE. 



45. Nov. Gen. (Fig. 12.), apparently allied to Sargus; but I am not ac- 



quainted with any genus of the family having the same nervure 

 in the wings. The antennae are no doubt distorted by pressure, 

 but they are too robust and short to belong to Beris or Xylopha- 

 gus. One of the halteres is discernible of this handsome and dis- 

 tinct insect, of which there is the cast. 

 Fam. Empid^e. 



46. Empis (Fig. 11.), a female, and cast. 



47. Obs. There are eight species of Empida, comprising apparently other 



species. 



Messrs Murchison and Lyell having received another box of 

 fossil insects from the same locality since the preceding obser- 



