210 THE CANADIAN ENTOMOLOGIST 



Fig. 6. Hypopygium of Geranomyia avocetta; dorsal aspect. 



Fig. 7 . Hypopygium of Geranomyia avocetta; ventral aspect, 

 showing a portion of the hypopygium. 



Fig. 8. Hypopygium of Dicranomyia nehidosa; lateral aspect. 

 The apical appendages are not included. 



Fig. 9. Hypopygium of Dicranomyia nehulosa; dorsal aspect. 



Fig. 10. Hypopygium of Dicranomyia japonica; dorsal aspect. 



Fig. 11. Ovipositor of Ptychoptera japonica; lateral aspect. 



Fig. 12. Hypopygium oi Ptychoptera japonica; lateral aspect, 

 tg — 9th tergite. 



Fig. 13. Hypopygium of Ptychoptera japonica; 9th tergite, 

 dorsal aspect. • 



Fig. 14. Hypopygium of Ptychoptera japonica; 9th sternite, 

 ventral aspect. 



Fig. 15. Hypopygium of Ptychoptera japonica; guard of the 

 penis (?). 



Fig. 16. Hypopygium of Ptychoptera japonica; ventral appen- 

 dage. 



(to be CONTINUED.) 



DONACIA EMARGINATA KIRBY (COLEOPTERA.) 



A Biographic Note. 



BY L. B. woodruff, NEW YORK CITY. 



Donacia emarginata Kirby may gain its sustenance 

 from various water-loving plants, but that which it seems to find 

 superlatively to its taste near New York City is the Marsh-mari- 

 gold, Caltha paliistris. In a certain wooded swamp just outside the 

 city limits, always wet under foot and in April excessively "soft," 

 grow and bloom great masses of these glorious golden flowers; and 

 when they reach the zenith of their splendor, in almost every clump, 

 half buried under their stamens, are from one to several of these 

 graceful metallic beetles. The sturdy crowfoot cup gives them 

 secure support, and in them throughout the flowering period they 

 are to be found in breeding pairs. On the stems just above the 

 roots the pupal cocoons are attached, sometimes several in a row; 

 but when the swollen buds expand the beetles emerge, leave their 

 lowly dwellings, and, climbing up the stems, attain the scene of 



July, 1913 



