1909.] NATURAL SCIENCES OF PHILADELPHIA. 231 



Mitopus australis n. sp. 



Pale brown, mottled with black, middle of eye-tubercles white. 

 Dorsum densely minutely granulate, two little elevations on the 

 anterior margin, each with three or four little teeth; eye-tubercles 

 spinulose, three first abdominal segments each with a submedian 

 pair of sharp spines, next two with four spines, last with two; each 

 segment with a few minute spinules, and on anterior border of abdomen 

 a curved series of minute spinules; legs with rows of very prominent 

 spinules, and at tips of femora and patellae are several larger spinules ; 

 coxse minutely spinulose, each spinule bearing a black hair. Femur, 

 patella, and tibia all thick and heavy, metatarsi and tarsi very slender, 

 femur I longer than width of body, II as long as body. Length 4.5 mm. 



From San Jose, Costa Rica (Tristan). 



Phalangium ornatipes n. sp. 



Body brown, paler below, dorsum darkest in front, a paler median 

 stripe which expands to sides at middle of length; palpi pale, brown 

 on base of femur, patella, and base of tibia; trochanters of legs pale 

 yellowish, also extreme bases of femora, rest of femora brown, patella 

 brown, with a pale streak above, tibia brown on base, paler beyond, 

 metatarsi and tarsi pale. Eye-tubercle smooth; a cluster of small 

 spines each side on front margin; palpi very short. Dorsum with 

 eight transverse rows of six spine-like tubercles, the median pair of 

 each row much larger than others, coxse slightly granulate, a small 

 white spine at anterior tip of each coxa, except I where it is on the 

 posterior tip. Legs rather short. Length 7 mm. 



From La Fortuna Cervantes (Tristan), Costa Rica. 



Liobunum biolleyi n. sp. 



Anterior part of cephalothorax brown, tubercle and middle part 

 black; abdomen black; coxse and venter pale brown, trochanters and 

 rest of legs black, tips pale, a prominent yellow spot at tip of hind coxa ; 

 two golden yellow spots each side near apex of abdomen above, and 

 sometimes a yellowish spot each side in front of these; palpi brown 

 on base, tarsus pale yellowish, mandibles pale. The cephalothorax is 

 pitted, and a narrow pitted band on base of the abdomen, then a large 

 area, densely pitted, occupying most of dorsum, and the posterior 

 segments each with a pitted band ; coxse and sternum granulate, venter 

 less strongly so; eye-tubercle with a few minute spicules above in 

 front; legs very long and slender. Length 6 mm. 



From Congrejal de Aserri (Pac), 800 meters, April (Biolley). 



