54 Journal New York Entomological Society. [Voi. xii. 



Genus TETRANYCHOIDES Banks, 1904. 



In October, 1903, Mr. W. H. Volck, of Berkeley, Cal., sent me 

 some pieces of orange leaves infested with a mite unknown to him. The 

 mites were in colonies of two or three up to a dozen or more ; usually 

 in a slight depression of the leaf. Each colony was evident to the 

 unaided eye as a snow-white patch ; this appearance being due to the 

 fact that the moulted skins are retained attached to the spot. The 

 mites and their eggs are located amongst them. The mite rests with 

 its legs extended and the beak placed against the surface of the leaf. 

 The eggs are spherical and hyaline. Here and there on the leaf were 

 threads like those of the " red-spider " ; it is probable that these were 

 made by the mites. 



The mites at first glance looks very much like a Tydeus (Family 

 Eupodidse), but Tydeus is a predatory, solitary mite. The affinities 

 are with the genus Eupalopis Can., but it differs from this, as well as 

 from all others of the family Tetranychidfe in having the last joint of 

 the palpi attached to the tip of the preceding joint. On account of 

 the appearance of a colony of these creatures, the mite may be com- 

 monly called, " the orange white spot." 



Tetranychoides, new genus. 



A Tetranychid, with moderately slender, tapering legs, each with two very short 

 claws and a median pulvillus. Body transversely divided at anterior third ; beak 

 large, prominent. Palpus of five joints ; the basal short, the next rather shorter, the 

 third the largest, the fourth very short, the fifth about as long as the third, but not 

 one half the diameter of the other joints, cylindrical, and tipped with a fine bristle. 

 Legs in two groups ; no eyes. 



Tetranychoides californica, new species. (Plate II, Fig. i.) 



Pale yellowish, legs and palpi nearly hyaline. Body broadest at shoulders, 

 tapering behind, rounded in front. Legs about three fourths as long as the body, 

 palpi rather more than one half as long as leg I. The anterior tarsi show two long, 

 erect bristles above ; few other bristles on the legs. The body almost bare. Length 

 0.24 mm. 



In colonies on under surface of orange leaves, Watsonville, CaL 

 (Volck). 



Genus TENUIPALPUS Donn., 1877. 



In August, 1903, Mr. S. A. Pease sent from Redlands, Cal., some 

 bits of orange peel infested with a small pale mite. On examination 

 these were found to belong to the genus Temiipalpus, no species of 

 which had been recorded from this country. The mites were quite 

 numerous, and evidently do some damage, perhaps, however, not as 



