THE NATURALIST'S CALENDAR 393 



April 21. May 23 Musca vomitoria (blue flesh fly) ap. 



22 Black snails abound. 

 22. May 25 Apple-treea fl. 



22. June II Large bat ap. 



23-29 Fragaria vesca (strawberry) fl. 



23 Erysimum alliaria (sauce alone) fl. 



24 Prunus avium (bird cherry) fl. 



24 Apis hypnorum ap. 

 24. May 28 Musca meridiana ap. 



25 Asilus (wolf-fly) ap, 



28. May 20 Papilio brassicae (great white cabbage 



butter-fly) ap. 



30. May 21 Libellulae (dragon-flies) ap. 



30. June 6 Acer majus (sycamore) fl. 



May I Bombylius minor ap. 



I. June II Glow-worm shines. 



1-26 Caprimulgus (fern-owl or goatsucker) 

 returns. 



I Ajuga reptans (bugle) fl. 



2-24 Gryllus campest. (field crickets) crink. 



2-26 Scarabaeusmelolontha (May chaffer) ap. 



3-30 Lonicera periclymen. (honeysuckle) fl. 



4-12 Lathraea squammaria (toothwort) fl. 



4. June 17 Shell-snails copulate. 



4 Small reed sparrow sings. 



5-17 Viburnum lantana (mealv tree) fl. 



10-30 Stoparola (flycatcher) ap, 



10. June 9 Apis longicornis ap. 



1 1 -1 3 Passer arund. minor (sedge bird) ap. 



13-15 Oak in male bloom. 



13 Papilio atalanta (admiral butter-fly) ap. 



14 Papilo cardamines (orange-tip butter- 



fly) ap. 



15-26 Fagus sylvat, (beech) fl. 



16 Acer campest. (maple) fl, 

 17-26 Berberis vulg. (barberry) fl. 



17 Papilio aegeria (wood Argus butter- 



fly) ap. 



18. June II Orange Uly fl. 



