CATALOGUE OF INSECTS. 623 



them have the curious habit of forming great rope-like masses when ready to 

 enter the pupal stage, travelling considerable distances sometimes to find a 

 suitable place. 



Where they occur in mushroom beds, fumigating frequently with tobacco or 

 pyrethrum to kill the adults inside, and keeping all windows closely screened 

 to prevent the entrance of specimens from outside, is the only practical measure 

 known to me. 



MACROCERA Meig\ 



M. clara Loew. Dunnfield, Del. Water Gap, VII, 8, 13, Clementon, VIII, 9. 

 M. forniosa Loew. Merchantville, V, 28, Del. Water Gap VII 12 ' Clemen 

 ton, VIII, 9. ' 



M. nebulosa Coq. Clementon, VI, 3, VIII, 9. 



M. hirsuta Loew. Dunnfield, Del. Water Gap, VII. 11. 



PLATYURA Meig. 



P. diluta Loew. Dunnfield, Del. Water Gap, VII, 11 15. 



P. mendosa Loew. Clementon, V, 30. 



P. tasniata Winn. Dunnfield, Del. Water Gap, VII, 12. 



P. elegans Coq. Shark River, VII, 12. 



P. inops Coq. Dunnfield, Del. Water Gap, VII, 8, 12. 



P. clausa Coq. New Brunswick (Sm). 



P. melasoma Loew. Del. Water Gap, VII, 12. 



ASYTSTDTJLTJM Latr. 

 A. montanum Roeder. Dunnfield, Del. Water Gap, VII, 11 15. 



NEOEMPHERIA O. S. 



N. balioptera Loew. Princeton, VII, 21, Westville, VIII, 23. 

 N. nepticula Loew. Merchantville, VI, 28. 

 N. didyma Loew. Woodbury, VI, 7. 



POLYLEPTA Winn. 

 P. tibialis Coq. Westville, VI, 6, Dunnfield, Del. Water Gap, VII, 8. 



SCIOPHILA Meigen. 



S. littoralis Say. Dover, VI, 17, Merchantville, VI, 28, Del. Water Gap, VII 



8, 13, Westville, VII, 21, Clementon, VI, 3 (Jn), New Brunswick' VIl' 



20 (Sm). 



HESPERODES Coquillett. 

 t 



H. johnsoni Coq. Delaware Water Gap, VII, 12. 



SYNTEMNA Winn. 

 S. polyzona Loew. Clementon, VI, 3. 



