PROC. ENT. SOC. WASH., VOL. 20, NO. 7, OCT., 1918 159 



Lauientia edwardsii var. ruficorna (MacGillivray) 



Tenthredopsis ruficorna MacGillivray, Can. Ent., vol. 25, 1893, p. 242. 

 Kincaidia ruficorna MacGillivray, Can. Ent vol. 46, 1914, p. 137. 

 Astochus fletcheri MacGillivray, Can. Ent., vol. 46, 1914, p. 108. 



The color markings of the four specimens of this variety vary 

 so that it seems necessary to propose the above synonymy. 



These four specimens come from "Washington State;" East on, 

 Washington; Kalso, British Columbia. 



Laurentia diluta (Cresson) 

 Tenthredo diluta Cresson, Trans. Amer. Ent. Soc., vol. 8, 1880, p. 24. 



This species is represented in the National Collection by only 

 one specimen from Santa Cruza Mountains, California. 



Laurentia rubens (Cresson) 

 Tenthredo rubens Cresson, Amer. Ent. Soc., vol. 8, 1880, p. 24. 



Eight males and one female of this . species from Nevada; 

 Placer Co., Siskiyou Co., Santa Cruza Mountain, California; and 

 Kalso, British Columbia, are in the National Collection. They 

 show considerable variation in the amount of yellow on the cly- 

 peus and some of the specimens show some yellow on the scutel- 

 lum. It is possible that some of these may be the males of ed- 

 wardsii, but in the absence of proof it seems advisable to retain 

 the name for the time being. This is also supported by the fact 

 that there, is one female in the lot. This female has the abdomen 

 (beyond the propodeum) all rufous and except for the black 

 mesepisternum might be considered as ruficorna. Furthermore, 

 the species described as aldrichi by MacGillivray may be the fe- 

 male of some of the males in this series. 



Laurentia aldrichi (MacGillivray) 

 Astochus aldrichi MacGillivray, Can. Ent., vol. 46, 1914, p. 137. 



Except for the shape of the postocellar area and size there are 

 no characters, in the original description, to distinguish this from 

 edwardsii var. rubcorna. The female considered as rubens is 

 about the right size for aldrichi but the mesepisternum is black 

 and the postocellar area is without a median furrow. Sec also 

 remarks under Laurentia rubens. 



