U. S. D. A., B. E. Tech. Ser. 20, Pt. II. F. I. I., March 4, 1911. 



TECHNICAL PAPERS ON MISCELLANEOUS FOREST 



INSECTS. 



II. THE GENOTYPES OF THE SAWFLIES AND WOODWASPS, OR 

 THE SUPERFAMILY TENTHREDINOIDEA. 



By S. A. RoHWER, 

 Agent and expert. 



INTEODUCTION. 



The following paper deals with the sawflies and horntails and 

 comprises the superfamilies Tenthredinoidea and Siricoidea *of Ash- 

 mead's classification; the Chalastogastra of Rev. F. W. Konow; the 

 Phyllophaga ( = Phytophaga) and Xylophaga of Cresson and authors; 

 or the genera Tenthredo and Sirex of Linnaeus. It is divided into two 

 parts ; the first part is an alphabetical catalogue of the generic names 

 used in Tenthredinoidea and Siricoidea with their type species; the 

 second part is composed of descriptions of the briefly characterized 

 genera and species described by the late William II. Ashmead. 



An effort has been made to include all the generic names used in 

 these two saperfamilies. In case of any omissions the author will 

 be most pleased to have these called to his notice.** 



AN ALPHABETICAL CATALOGUE OF THE GENERIC NAMES USED 

 IN THE TENTHREDINOIDEA, WITH THEIR TYPE SPECIES. 



THE DESIGNATION OF THE TYPE SPECIES OF GENERA. 



The necessity of having the types of genera fixed is now recog- 

 nized by almost every working systematic entomologist. In the 

 designation of the following genotypes the rulings and recommen- 

 dations of the International Commission on Zoological Nomenclature 

 have been followed. As these rulings and recommendations have 

 never been finally codified, and there are in a few cases apparently 

 contradictory statements, the personal equation has entered into 



« Address Bureau of Entomology, Department of Agriculture, Washington, D. C. 



69 



