luded to the economy of Psc?i atrattis {P. ater Lat. ?), and my re- 

 marks have since been confirmed by Mr. A. Kennedy, who states 

 in the Phil. Mag. for Jan. 1837, that "this insect has been ex- 

 ceedingly numerous this year, using the straws in the thatch to 

 deposit its prey in, in some of which I have counted as many as a 

 hundred Aphides. The partitions appear to be made of the scrapings 

 of the inside of the straw cemented together. The egg is white 

 and semitransparent, and is attached to the abdomen of an Aphis 

 near the bottom of the cell. The males first appeared the begin- 

 ning of July, flying about the thatch and the neighbouring shrubs 

 in thousands. They disappeared about the end of the month. 

 The females did not become numerous until the 10th." — page 18. 



* 9,71(1 and 3rd suhmargvial cells, each receiving a recurrent nervure. 



1. compressicornis 7vz6. S • — T. atratum Fab. ? . — pallipes Spin, cf . 



— serraticornis Jur.pl. 8. Gen. 6. S • — ater Panz. 72. 7. c?. 



Rare, taken by Mr. Kirby in Suffolk, and I have once taken it 

 probably in the same county. 



2. atratus Panz. 98. 15. — ater Lat.? — pallipes Panz. 52. 26. (^ ? 



End of June, bred one male and many females, out of straws from 

 the roof of a summer-house at Bristol. 



** MiMESA Shuck. 2nd S2(b7nargi7ial cell receiving 2 recurre7it7ierviires. 



3. equestris Fah. — Curt. Brit. E7it.pl. 25. ? . — rw^a.Pa7iz. 96. 17. S' 



This pretty little species I took flying near Lyndhurst in the 

 New Forest the end of August 1822, and I have since taken it the 

 end of July on Hampstead Heath in company with Ce7xeris are- 

 naria, pi. 269. 



4. bicolor Jur. pi. 13. ^. 



Females taken with the last species on Hampstead Heath the end 

 of July ; also on Blackheath, and on banks of gravel at Coomb-wood. 



5. unicolor Van. Li7id. part 2. p. 105. 



Darent-wood, Mr. Shuckard; in posts and rails, North Wales, 

 Mr. F. Walker. 



The plant is Ra7iu7iculus Ficaria, Common Pilewort. 



