OF NORTHUMBEBLAND AND DURHAM. 149 



4. C. luteipalpis, St. Farg. Smith, Monog., 127, 5 ; C. elon- 



gatulus, Dahlb., Hym. Europ., I., 315, 196. 



Rather common. Mitford, Long Benton, Heaton, Haltwhistle, 

 and Lanercost. June and July. At Long Benton it makes its 

 nests in "blisters" of the lime on the garden wall, which it pro- 

 visions with Aphides from the roses at its foot. 



5. C. vari'us, St. Farg. Smith, Monog., 129, 7; C. spiui- 



pectus, Dahlb., Hym. Europ., I., 327, 215. 



Somewhat rare. Mitford and Lanercost. July. 



6. C. leucostoma, Linn. Dahlb., Hym. Europ., I., 341, 243; 



Smith, Monog., 131, 10. 



Not uncommon, Gibside, Mr. J. Hardy. In great numbers, 

 burrowing in decayed willows, and provisioning its nest with 

 Diptera, at Long Benton, in July. 



7. C. 2}odagricus, Van D. Dind. Shuck, Foss. Hym., 157, 



19 ; Smith, Monog., 134, 12. 



An abundant species. Long Benton, Mitford, Gibside, Halt- 

 whistle, and Lanercost. • July. 



8. C. quaclriynaculatus, Fab. Dahlb., Hym. Europ., I., 351; 



30 ; Smith, Monog., 142, 21. 



Apparently rare. I have three males taken at Gibside. 



9. C cetratus. Shuck. Dahlb., Hym. Europ., I., 337, 221 ; 



Smith, Monog., 145, 23; C. melanarius, Bold, Zool., 



XV., 5631. 

 Somewhat rare near Haltwhistle ; more plentiful near Laner- 

 cost, breeding in deca3dng wood, and provisioning its nest with 

 small Diptera. July. 



10. C. cribrarius, Linn. Dahlb., Hym., Europ., I., 353, 231 ; 

 Smith, Monog., 149, 27. 



Found abundantly throughout our district. It frequents sandy 

 places, and burrows in the ground, provisioning its nest with 

 Diptera. 



