A PHYTOPTID GALL ON ARTEMISIA 281 



This mite causes a white or pinkish swelling on one side of the leaf of 

 Artemisia californica. At the infected point the leaf is often bent or some- 

 times sharply folded. The gall is composed of a woolly mass of tangled fibres 

 and stands out from two to four times the thickness of the leaf. The general 

 shape of the gall is indefinite, several gall areas often running together. 

 Very abundant at Claremont, California, on Artemisia californica. 



This species appears to be entirely distinct from the Briophyes artemisiae 

 Can., of Europe. 



A NEW SPIDER 



BY KARL R. COOLIDGE 



Epeira labyrinthea grinnelli n. var. 



Differs from the typical form, in the decidedly increased size, in the 

 coloration being more pronounced on the head, cephalothorax and abdomen^ 

 the bands of the legs, particularly on the femora, are wider and heavier; the 

 abdomen is wider and more pointed apically, more rounded basally, forming 

 an inverted cone, at the apex of which well underneath are the spinnerets. 



Habitat — Specimens from Palo Alto, Santa Clara County ; Pasadena, 

 Los Angeles County ; Lompoc, Santa Barbara County. B. labyrinthea 

 Hentz ranges throughout the entire United States, and south through 

 Mexico and Central America into the northern parts of South America. 

 It also occurs commonly in the Barbadoes and West Indies. As McCook 

 has previously noted and figured (Amer. Spid., vol. 3, pi. VII, Figs. 

 12, 12a, 1893), Pacific Coast and tropical representatives differ considerably 

 from those of the Atlantic seaboard, and are, I believe, worthy of good 

 subspecific rank, to which I have above given the name grinnelli, for my friend 

 Mr. Fordyce Grinnell, Jr., of Pasadena, California.- 



