Sept. 1893 ] Banks: On Mexican Phalangida. 181 



SOME MEXICAN PHALANGIDA. 



By Nathan Banks. 



Cynorta mexicana, sp. nov. 



Length body, 6.5 mm. ; breadth, 4.5 mm. ; femur I, 2 mm.; femur II, 3.5 mm. 

 Dull yellow brown, tibiae darker, last palpal joint black. Dorsum nearly smooth, 

 eye tubercle low, smooth ; tibia of palpus very broad, last joint ending in a fine 

 curved claw; legs I, II and III nearly smooth, with fine hairs; venter smooth; 

 •dorsum of abdomen with low tubercles along each side to the hind femora, on hind 

 part of middle a pair of very small tubercles, scarcely evident, and behind them a 

 transverse row of four minute tubercles, the hind border of the shield and of the 

 next two segments with a row of small tubercles ; hind leg spinulate on femur, patella 

 and tibia, rather more strongly on last two, on inner side of femur near tip is a larger, 

 prominent, blunt spine. Readily known from our forms by larger size, absence of 

 markings, small tubercles, and armature of hind leg. 



Erginus mexicana, sp. nov. 



Length, 3.9 mm.; femur I, 1.7 mm.; femur II, 3.1 mm. Body almost uniform 

 pale yellowish, legs paler, nearly white. Dorsal surface evenly and rather roughly 

 granulate, eye-tubercle broad, low; basal joint of mandibles swollen above and 

 prominent, distinctly granulate; palpi appressed to mandibles, the femur broad, den- 

 ticulate above, below on inner margin with six blunt teeth, tibia very broad, concave 

 within, margins with bristles, tarsu; slender, one half length of the tibia, ending in a 

 long, fine, curved claw; venter and coxa; granulate; the margins of the very much 

 retracted segments denticulate; legs slender, finely granulate, fourth pair nearly as 

 long as second, but the fourth tarsus shorter than that of second leg. 



One specimen ; readily known by the blunt teeth under the femur 

 of palpus. 



Liobunum mexicanum, sp. nov. 



Length body 4 mm , femur I, 11 mm., femur II, 18 mm. Dark brown above, 

 nearly uniform, but fiintly showing a chocolate brown vase-mark on basal part of 

 abdomen ; beneath wholly pale ; palpi pale, brownish on base of the femora, above 

 on patellae, and at base and tip of the tibiae; mandibles pale ; legs brown, with scat- 

 tered pale dots on basal joints, often arranged in groups, coxae pale, trochanters brown- 

 ish, extreme tip of tibiae pale. Dorsum above quite finely and regularly granulate ; 

 eye-tubercle quite high, smooth, the eyes prominent ; last joint of palpus as long as 

 tibia and patella together, scarcely curved, each of the coxae I, II and III terminate 

 above next to the body in a small white spine. 



Amecameca [Barrett]. The specimen has but three legs on the right 

 side, leg II being absent and its coxa is rudimentary. 



Liobunum albipalpe, sp. nov. 



Length body 5 mm., femur I, 12 mm., femur II, 20 mm. Palpi white, basal 

 joints rather yellowish, mandibles pale yellowish ; cephalothorax black in center, 



