METACONOMMA.—PALPINUS, 577 
Trochanter iv. not dilate, with a spur on each anterior angle; femur iv. similar to femur iii., but with the 
denticles more numerous. The space between the spiracles is about one-third longer than the width of 
the first three opisthosomatic segments. 
Hye-tumulus forming a very stout, broad, erect, somewhat truncate cone, its extreme apex, however, ending 
in a sharp point, the eyes being situated one on each at the base. The five segmental strive of the dorsal 
scutum are very distinct (but not so deep as in Paramitraceras granulatus), the outer margin of the scutum 
being bordered with a row of fine closely adjacent granules; while the outer angles of each free segment 
have a short row of granules; ventral segments without granules. 
Colour. Body uniform brown, mandibles paler. 
Hab. Mexico, Teapa (H. H. Smith). 
Fam. PALPINIDZ, nov. 
The single species comprised in the Palpinide differs so entirely in some of the most important details of its 
structure from those of the allied groups of the Laniatores that one is compelled to make it the type of a 
new family. 
The sternal plate, though narrow and long as in other Laniatores, is broader in proportion, and is dilate 
opposite the coxe of legs i., forming a diamond-shaped termination. The palpi are long, slightly longer 
than the body, slender, cylindrical, unarmed, except for a small spur at the base of the trochanter ; the 
tarsus is almost as long as the tibia, while the tarsal claw is dilate basally and apically produced into a 
sinuous spine. The legs are short; femora ii. and iv. scarcely longer than the body, unarmed, except coxa 
and trochanter iii. and iv., ii. and iv. slightly shorter than i. and iii., while the tarsal claws are one in 
number on legs i. and ii., and two on iii. and iv., the latter with a white vesicle between them. ‘Tarsal 
segments, i. 2, not dilate; 11.3; ili. 3; iv. 4. The eye-tumulus, similar to that in Erginus, &c., is three 
times longer than broad (seen transversely). The third segment of the dorsal scutum has a pair of short 
coniform spines. The free segments have a marginal row of minute tubercles; otherwise the body is 
entirely smooth. The most noticeable character, however, lies in the sharp definition of three distinct 
segments on the sheath of the penis: the small apical sclerite, a second, elongate, coniform plate, separated 
by a fold of connective tissue from the third, a narrow transverse plate bearing the spiracles. 
A single genus, based upon several specimens of a single species, occurs in the 
collection. 
PALPINUS, gen. nov. 
Type P. levis, sp. n. Costa Rica. 
The generic characters will be found under those in the diagnosis of the family. 
1. Palpinus levis, sp. n. (Tab. LIV. figg. 7, 7 a-d, ¢.) 
Type, 3, in coll. Godman & Salvin. Total length 5 millim.; femur iv. 5-5 millim. 
The structural characters will be found under the diagnosis of the family. Tarsal segments, i. 2; ii. 3; li. 3; 
iv. 4. 
Colour. Very variable, olive-brown, mottled with darker brown ; the legs olive-brown, the coxa and trochanter 
sometimes paler. 
Hab. Costa Rica (Sarq). 
BIOL, CENTR.-AMER., Arachn. Opil., Vol. II., January 1905. 4xt 
