HYMENOPTERA. 51 



2. Andrena convexiuscula, Kirby. Occasionally 



common, May and June. 



3. A. Afzeliella, Kirby. Common, April and May. 



4. A. fuscata, Kirby. Not common, April and May. 



5. A. dorsata, Kirby. Not common, July and 



August. 



6. A. parvula, Kirby. Common on flowers in May. 



7. A. nana, Kirby. Not common, June and July. 



8. A. labialis, Kirby. Abundant, May and June. 



9. A. chrysocles, Kirby. Common in June. 



10. A. albicrus. Occasionally common, May and 



June. 



11. A. aprilina, Smith. Rare. Taken by my father, 



May 12th, 1835, and May 15th, 1835. 



12. A. fulvago, Kirby. Not common, May. 



13. A. fulvescens. Smith. Very rare. Taken by 



my father, May 29th, 1840. 



14. A. denticulata, Kirby. Not common, July and 



August. 



15. A. Trimmerana, Kirby. Abundant, March and 



April. 



16. A. nigroaenea, Kirby. Abundant, April and May. 



17. A. atriceps, Kirby. Abundant, April and May. 



18. A. varians, Rossi. Common, April and May. 



19. A. helveola, Linn. Common, April and May. 



20. A. sestiva, Smith. Common, May and June. 



21. A. Gwynana, Kirby. Abundant from February to 



April. 



22. A. Clarkella, Kirby. Abundant, March and April. 



