516 H. Loew, Tab z. Bestimmen d. nordumerik. Arten d. Tipul. -Gattung Pachyrrhina. 



20. circumscripta Lw. 



ß. Joints of the flagellum pale at base; anteunae with more than 

 13 joints in both sexes. 

 * Stigma yellowish brown. 

 Apex of the wings not distinctly infuscated. 



21. eucera Lw. 



_ ** Stigma dark-brown. 



Apex of the wings distinctly infuscated. 



22. polytnera Lw- 



