460 Annals Entomological Society of America [Vol. VI, 



Generally distributed in Southern California on citrus trees, 

 also found on deciduous trees. A serious pest of stone and 

 pomaceous fruit trees in certain parts of Oregon. 



Tetranychus longipes Banks. 



Tetranychus longipes Banks— Proc. Entom. Soc. Wash., Vol. XIV., p. 27. (1912). 



This Species is so different from most of the other species in 

 the genus, that it might well be made the type of a new genus. 

 It has strong affinities with the genus Bryobia; in the general 

 shape of the body, in the length of the anterior pair of legs, in 

 the possession of the horn-like setae at the anterior end of the 

 cephalothorax. I have examined the tarsal appendages of leg 

 I, and find that with 2000 diameters magnification they are 

 very complicated, and do not consist of two simple claws as 

 Banks states. There is one large simple claw to the tarsus. 

 Above this and apparently fused with it is a chitinous projection 

 with many parallel hairs forming a comb. On either side of 

 the tarsal claw is a pulvillus-like structure, each of which has 

 several projecting tenent or other hairs. 



I have observed but one male specimen of this species, and 

 this specimen was very much dilapidated. What I have taken 

 to be the penis may be described as follows : 



Penis very large and long; much longer than the penis of any other 

 species examined. Inner lobe about one third as long as the shaft, 

 broadest at its base. Shaft long, curved, seta-like. Basilar lobe, hook, 

 and barb absent. 



From Springer, New Mexico; on grass (A gropyron) ; by C. 

 N. Ainslie. From Holtville, California; by Wildermuth. 



