Dr. Leach's group Xiphydriadae has been always included 

 by Latreille with his Tenthredinidae : it is not necessary here 

 to inquire whether it be expedient to establish two families, 

 but it is evident that Cephus does not belong to Dr. Leach's 

 group ; for the perfectly developed and trilobed labium and 

 long palpi show that its habits are similar to those of the 

 Tenthredinidae ; its posterior tibiae also, spurred towards the 

 middle, are similar to those of Hylotoma {pi. Q5) : and it is 

 stated by the learned naturalist of Paris, that the larvae of a 

 new species (C ahdominalis^ Lat.) live upon the flowering buds 

 of fruit-trees, and do them a great deal of mischief. 

 The following are British Cephi. 



1. C. Troglodyta JP.— P«/2^. 83. 12.—Klug. 49. pi. 6./ 1, 2. 



2. C. pygmaeus Linn. — King. 50. pi. 6./. 3. — spinipes Panz. 



1'6. 17.— Klug. 51. pi. 6. f. 4. a. 6.— viridator Fab. 



June, on flowers in fields; beginning of July, females 

 in abundance on white umbellate flowers on the sides 

 of roads near Dover, but not one male. Also upon 

 grass in woods at Southgate. 



3. C. pallipes Klug. in the Berlin Transactions, 53. pi. 6./. 6. 



4. C. floralis Klug. ditto pi. 6./. 5. a, h. 



5. C. analis King. 54. ;;/. 7. /. 1. — haemorrhoidalis Jur. pi. 7. 



Gen. 9. 



6. C. tabidus F.—Panz. 85. 11.— Klug. 56. pi. 7./. 3. a, h.— 



Took a pair at Dover with C pygmceus the beginning 

 of last July : found also upon grass in woods at South- 

 gate by Mr. F. Walker. 



7. C. pusillus ^tep. — punctatus Klug. 55. pi. 7. f.l.a^h ? 



8. C. Satyrus Panz. 85. 12. 



9. C. phthiscus Fab. Piez. 251. 5. 



10. C. femoratus. Curt. Brit. Ent.pl. 301. — On the 4th June, 

 1824, 1 took the specimen figured, off" an oak in a 

 meadow in the neighbourhood of Lyndhurst, Hamp- 

 shire. 

 The plant is Ranunculus arvensis (Corn Crowfoot). 



