36 MISCELLANEOUS STUDIES 



KEY TO CALIFORNIA SPECIES 



1. Wings hyaline 2 



- Wings with veins clouded (fig. 275) populicola (Thomas) 



2. Ill longer than VI (including spur) negundinis (Thomas) 



Ill not longer than VI (including spur) 3 



3. IV with secondary sensoria crucis Essig 



IV without secondary sensoria salicicola Essig 



32. Thomasia crucis Essig 



Figure 76 



Essig, Pom. Jour. Ent., vol. 4, p. 742, 1912 (orig. desc.). 

 Records. Salix macrostaohya, Santa Paula, August, 1911 (Essig). 



Essig once found this species on the leaves of willow near Santa 

 Paula. Since then it has never again been taken. The author has 

 had access to cotype specimens in Essig 's collection. 



33. Thomasia negundinis (Thomas) 



Thomas, 111. Lab. Nat. Hist., Bull. 2, p. 10, 1878. Chaitophorus (orig. 



desc.). 



Sanborn, Kan. Univ. Sci., Bull. 3, p. 35, 1904. Chaitophorus (desc.). 

 Davidson, Jour. Econ. Ent., vol. 3, p. 376, 1910. Chaitophorus (list). 

 Essig, Pom. Jour. Ent., vol. 4, p. 716, 1912 (list). 



Records. Acer negundo, Stanford University (Davidson) ; Salt Marshes, Palo 

 Alto, May, 1912 (Morrison). 



This species of Thanuisia is quite common on box elder in the 

 vicinity of Stanford University and Palo Alto. The author has never 

 taken specimens, nor had access to any. Morrison writes that 



* 



although he has never had access to eastern specimens of T. negundinis 

 (Thos.) for comparison he is not able to convince himself that the 

 western species is negundinis. The author is unable to form any 

 opinion at present, having never seen specimens, hence lists the species 

 as Davidson has done. 



34. Thomasia populicola (Thomas) 



Figures 77, 275 



Thomas, 111. Lab. Nat. Hist, Bull. 2, p. 10, 1878. Chaitophorus (orig. 



desc.). 



Essig, Pom. Jour. Ent., vol. 1, p. 98, 1909. Chaitophorus (desc.). 

 Essig, Pom. Jour. Ent., vol. 4, p. 716, 1912 (list). 



Records. Populus spp., Salix spp., Santa Paula (Essig) ; Eiverside, May, 1917; 

 Populus sp., Canton, Broadwater County, Montana, July, 1915, R. W. Haegele; 

 Edna Canon, Boxelder County, Utah, August, 1916, R. W. Doane. 



