NO. 2167. SEVEN NEW SPECIES OF RED SPIDERS— liFOREGOR. 583 



median line near hind margin of abdomen. Body of female ovate, 

 widest across front region of abdomen, slightly obese for the size of 

 legs; cepahalo thorax rather evenly roimded anteriorly with a sUght 

 truncate border overlying the palpi; male elongate-sagitate in out- 

 line, legs conspicuously long for size of body. Mandibular plate 

 sUghtly over half as wide as long, tapering gradually forward, with 

 almost no emargination anteriorly. "Thumb" of palpus subcylin- 

 drical, beUing considerably at base, upper surface indented near cen- 

 tral point; tip of "thumb" bearing three "fingers," one at inferior 

 angle conical and three times as long as thick, one at superior angle 

 slender and eight times as long as thick; a slender "finger" between 

 these at inner angle which in size is intermediate between them. A 

 reduced "finger" and a slender spine arise side by side from the 

 indentation of the upper side of "thumb"; a hair arises latero-ven- 

 trally from near base of "thumb." The claw of the penultimate 

 joint reaches to the subbasal "finger. " Legs of female are of average 

 length, barely less than that of body; those of male are shghtly 

 more than half again as long as body. Femur nearly five times as 

 long as thick, from three-quarters again to twice as long as tarsus. 

 Tibia about a quarter again as long as patella, which is two and a 

 half times as long as trochanter. Kelative length of joints are 

 as follows: Coxa, 6; trochanter, 4; femur, 15; patella, 10.3; tibia, 

 12.7; tarsus, 8.5. Tip of tarsus not provided with a claw. The 

 usual series of foiu" capitate hairs arise from the end of the onychium. 



Type.— C&t. No. 20170, U.S.N.M. 



The type material from Mira Flores Station, Departmento of Piura, 

 Hacienda "San Jacinto," Peru, South America, October 15, 1912, 

 on papaya (Carica papaya). Collected by Mr. E. W. Rust. Allied 

 to T. latus of Europe, but closest to T. hanksi McGregor, from which 

 it may be distinguished as follows : 



T. hanksi: Body widest across middle of cephalo thorax ; length 

 of body of male barely exceeding width; 18 spatulate-serrate hairs 

 comprise the dorsal series of epidermal appendages; palpal "thumb" 

 with a single terminal "finger;" mandibular plate distinctly emar- 

 ginate. 



T. rusti: Body widest across anterior region of abdomen; length of 

 body of male two-thirds again as long as wide; 26 slightly serrate rod- 

 like hairs comprise the dorsal series of epidermal appendages; palpal 

 "thumb" with three terminal "fingers;" mandibular plate not 

 clearly emarginate. 



Notes. — ^Mr. Rust writes that — 



A bad infestation injures the large, tender leaves of the papaya in much the same 

 way that cotton is injured by T. bimaculatus. Very abundant, feeding on the upper 

 sides of medium-aged leaves, but very little web was seen. In short the species in 

 life behaves and appears so much like T. bimaculatits that I supposed from a super- 

 ficial examination that they were one and the same. In color, like T. bimaculatits, 

 ranging from yellowish and greenish to red. No predaceous species were noted. 



