674 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



colorless, arising from rather prominent tubercles, densely clothed 

 with distally pointing barbules; subfrontal bristle one-fourth again 

 as long as frontal one. Body of female rotund-elliptical, length, 

 0.302 mm.; width, 0.259 mm. Male much less rotund, narrowed 

 baclovard; length, 0.237 mm.; width, 0.184 mm. Bristles about 22 

 in four rows, in length averaging about five-sevenths the width of 

 body. Mandibular plate three-fourths again as long as wide, nar- 

 rowed somewhat anteriorly to a rotund tip, which is distinctly 

 emarginate in the female. Palpi pale pink, like cephalothorax. 

 "Thumb" of palpus not greatly shortened axially, the thickness at 

 middle being about one-fifth in excess of its length, 

 bearing at its tip a slightly clavate "finger," whose 

 base is less than half as wide as the tip of ' ' thumb ;" 

 on its upper distal corner are two spine-like pseudo- 

 fingers; on upper side almost midway to base is 

 a greatly reduced "finger," about one-fourth as 

 thick as the terminal "finger," and between this 

 and base are two short stout hairs rather similar 

 to the pseudo-fingers. A hair, similar to the upper 

 basal one, arises laterally from the center of the 

 "thumb." The claw of the penultimate joint 

 Fig. 10.— paratetrany- rcaches just beyond the dorsal "finger." The legs 

 cHus lucis MCGREGOR. J ambcr-color, not quite as long as width of 



1, TIP OF MANDIBULAR i '1 _ '^ 



plate; 2,PENisAND HIND body. Fcmur thrcc aud ouc-half timcs as loug as 



?0RiIiN?Lr'''' ^' ^ "" "" ^^^' soinewhat exceeding tarsus. Tibia nearly a 

 third longer than patella, which is nearly twice the 

 length of the trochanter. Tip or tarsus bears a stout claw, which is 

 sickle-shaped ; six slender spurs, which are free to their bases, arise per- 

 pendicularly from the claw a short distance from its base. The usual 

 series of four tenent hairs are present, two on each side fusing to 

 form a swollen pedicel, which are set on the onychium on either 

 side of the main claw base. Relative lengths of leg joints as follows: 

 Coxa, 15; trochanter, 7; femur, 26; patella, 12; tibia, 15; tarsus, 23. 

 The collar trachea, opening medially in a pore, runs downward in an 

 almost straight line, and just above the ventral end bends sharply 

 backward and expands into an elliptical chamber, which is twice 

 the caliber of the hnear portion. 



Penis (see pi. 79, fig. 17) appears to be intermediate between the 

 TetranycJius himaculatus type and that of T. monticolus. The inner 

 lobe is rod-hke, slender, and over twice as long as the shaft; a well- 

 developed basilar lobe occurs dorsally; the shaft is comparatively 

 short and thick and is bent abruptly downward at an angle of over 

 90° from the main axis of the penis to form the stout hook; the hook 

 is about one-half the length of the shaft, and terminates in a rather 

 straight, unbarbed, very sharp spur. 



