OF WASHINGTON. 253 



larger of those of the tibia are barbed. Tarsus with a pair of blunt, conic 

 spines on the ventral face a short distance below the base of the large, 

 simple claw, otherwise armed only with scattering hairs, of which the 

 larger are barbed. 



First pair of legs very slender, considerably longer than the body, 

 consisting of 13 joints, the tarsus being 8-jointed; the tibia is subar- 

 ticulated near the base; the first tarsal joint is very small, the second is 

 nearly half as long as the others taken together; the third is as long as 

 broad, and the others are distinctly longer than broad. 



Second pair of legs slightly larger than the third and much smaller than 

 the fourth ; the coxa of the second legs bears a large, sharply conic proc 

 ess directed obliquely cephalad and laterad ; the coxae of the other legs 

 are prominent at the distal corner in front but are not produced; the 

 third and fifth joints of the last pair of legs are noticeably larger than in 

 the others, but the femur is not so robust as in Schizomus; the meta 

 tarsus has its three joints subequal ; to the last is movably articulated the 

 three-pronged claw, of which the inferior division is short and is directed 

 downward rather than forward. 



Cephalothorax suboval, apiculate in front, divided into five parts, of 

 which the anterior is much larger than all the others; behind this is a 

 pair of small, narrowly subtriangular transverse plates unknown in other 

 genera; these are followed by two others about as broad as long, similar 

 to those of the genus Triplomus. Behind this pair of plates is a transverse, 

 subarcuate sclerite which seems to belong to the thoracic rather than to 

 the abdominal region, although previous writers have not so reckoned it. 



Abdomen composed of n segments and a i-jointed caudal process; 

 eight of the abdominal segments are separated into two parts by a broad 

 lateral space which is slightly coriaceous, but not chitinized, while the 

 three distal segments are complete rings. The first ventral sclerite is en 

 larged at the expense of the second, and is much larger than the corre 

 sponding dorsal plate. The last segment is produced above into a blunt 

 process. 



Caudal appendage of supposed male with a short pedicel bearing a long, 

 narrow, subtriangular body, which tapers from an abruptly enlarged base 

 to a rather blunt apex. As in the other genera, the other sex has this 

 process reduced to a small, upcurved rudiment, not capitate or otherwise 

 enlarged. 



HUBBARUIA PENTAPELTIS, new Species. 



Plate III, figs. la-in. 



Length of body of supposed male n mm. ; width 1.5 mm.; length of 

 cephalothorax 3 mm.; of abdomen 6.3; of caudal appendage 1.7 mm. ; of 

 first pair of legs 1 1.2 ; the specimen supposed to be a female measures 

 about 6.5 mm. in total length, the abdomen being noticeably shorter and 

 more robust than in the male; this specimen may, however, be imma 

 ture. 



