PROC. ENT. SOC. WASH., VOL. 20, NO. 4, APR., 1918 79 



on moist sand dunes almost at the ocean's edge. At the date 

 of the visit the plant, which is a vigorous growing shrub of 

 dense habit, was in an advanced fruiting condition, and the bolls 

 were harboring adult weevils in abundance. 



An examination of the material in the National Herbarium 

 has revealed the presence there of eleven sheets of G. davidsonii, 

 one from Guaymas, Sonora, and ten from Lower California 

 points as follows: Cape .San Lucas; Magdalena Island; San Jose 

 del Cabo; Agua Verde; Cerralvo; Tres Pachitas; Valle Flojo, 

 elev. 200 to 500 feet; Cerro Colorado, elev. 800 feet; Rodriquez, 

 elev. 1400 feet. These distributional data indicate that this 

 new boll weevil host occurs rather thoroughly throughout the 

 southern portion of Lower California at elevations varying from 

 sea level to 1400 feet, and as far northward on the east shore 

 of the Gulf of California as Guaymas. Later, a trip was made 

 southward from San Luis, Mexico, to a point near the head of 

 the Gulf about 15 miles south of La Bolsa, where no sign of this 

 cotton species was found, nor did it occur on the coast opposite 

 Tiburon Island. It will be of great interest to determine just 

 how far northward this new boll weevil host occurs, both in 

 Sonora and in Lower California. 



NEW SAWFLIES OF THE SUBFAMILY DIPRIONINAE (HYM.) 



BY S. A. ROHWER. 



Specialist in Forest Hymenoptera, U. S. Bureau of Entomology, 



Washington, D. C. 



For a number of years the author has been working on the 

 sawflies belonging to the subfamily Diprioninae and has practi- 

 cally completed a revision of the species, in which all of the 

 species known to him are characterized and notes on their biology 

 summarized. Because of the size and number of illustrations in 

 this manuscript revision it seems impossible to publish it at 

 present. It, therefore, seems desirable to publish a preliminary 

 paper, outlining the classification used and 'describing some of 

 the new species. 



Subfamily Diprioninae Enslin. 

 The following references refer only to the more recent authors: 



Lophyrides Koimvv. Gen. Insect. Fas. 27, 1905, p. 41. 



Lophorinae -MursiUivniy, Pn.c. U. S. Nat. Mus., vol. 29, 1906, p. 629. 



Monocteninae Alar^illivrny, Proc. U. S. Nat. .Mus., vol. 2'.), lUOli. p. 634. 

 Diprionidae Rnhwcr. Proc. Knt. Soc. Wash., vol. 13, 1911. p. 220. 

 [)/' jtriiin inin Muslin. Dcutsdi. Knt. Zoitschr., Beihef t . T.U2. p. 38. 



