194 ENTOMOLOGICAL NEWS [May, '17 



the preceding joint, legs with long slender bristles, more numerous, 

 but shorter, below than above. Mandibles with a slender blade and 

 the opposite portion tipped with a process of several curved teeth ; 

 palpi short and stout, last joint scarcely longer than the preceding 

 one. 

 Length, .8 mm. 



From Tempe, Arizona, December 14, 1911 (A. N. Wilson), 

 and Wagoner, Oklahoma, December 3, 1914, on wheat. 



TETRANYCHIDAE. 

 Tetranychus antillarum n. sp. (PI. XIV, fig. 5; PI. XV, fig. 13). 



Body yellowish, fully twice as long as broad, tapering at each 

 end, with long stout bristles above; two each side in front, the 

 anterior much shorter than the other, abdomen with five in a 

 submedian row each side, and a sublateral row of four bristles, 

 each as long as femur I. Legs shorter or barely as long as body, 

 legs I and IV subequal, leg II about two-thirds as long as leg I, 

 all with long bristles, one on the femur longer than the joint; claw 

 of tarsus strongly bent. Mandibles (inside view) very broad just 

 before tip, then suddenly concavely narrowed to the hook, which is 

 small. Palpi very small and inconspicuous. 



Length, .35 mm. 



On leaves of Leonotis nepetaefolia, August 6, 1912, Rio 

 Piedras, Porto Rico (T. R. Jones), also on Asclepias curassa- 



inca. 



TETRANOBIA n. gen. 



The stigmata are in a distinct horn each side at base of the 

 mouth parts. Legs moderately long, first pair as long as the 

 body; the tarsi are plainly shorter than the preceding joint, and 

 end in a single claw. The body is furnished with fine, simple 

 hairs like Tetranychus, and there is no four cleft plate on the 

 front margin. The palpi are stout and the thumb tipped with 

 fingers as in Tetranychus. 



Type Tetranychus longipes Bks., and includes also the fol- 

 lowing new species. 



Tetronobia decepta n. sp. (PI. XIV, fig. 3; PI. XV, fig. 15). 



Body about one and one-half as long as broad, broadest behind 

 the middle, and at this point very high ; clothed sparingly above with 

 a few, very short, simple bristles, mostly behind, but one pair on 

 front margin over the mandibles. Legs very slender; leg I as long 

 as body, II not half as long as leg I, III but little longer than II, 



