1960 ] 
Christiansen — Genus Pseudosinella 
19 
Facies typical of genus. Color white without vestige of pigment. 
Head round, eyeless. All antennal segments subcylindrical ; apex of 
fourth segment blunt ; apical organ of third segment with two large 
elliptical pegs, constricted basally. Second thoracic segment slightly 
humped, head more or less prognathous. Fourth abdominal segment 
about three times as long as third. Unguis with only two strong 
basal internal teeth, arising at about same level and with one greatly 
enlarged. Empodial appendage with inner margin slightly truncate, 
and outer margin equipped with a prominent tooth on a distinct 
lamella. Tenent hair short and clavate. Mucro with apical tooth 
slightly longer than anteapical ; basal spine not attaining apex of 
anteapical. Anterior macrochaetae as follows : dorsum of head with a 
group of five at each antenna base and four interantennals. Another 
pair of setae can be seen near the lateral margins of the middle of the 
dorsum ; ventral surface with numerous scattered setae on the anterior 
third of the lateral and median portions. Anterior margin of the 
second thoracic segment with four to five rows of setae and a single 
row along the lateral margins. 
Type locality: epigeic “Station No. 36,” Massachusetts. Also re- 
corded as an epigeic form from several places in the vicinity of Boston 
and New Orleans. Cave distribution: known only from Limberlost 
Valley Cave, Newton County, Missouri. 
Discussion 
Recent collections from South America would seem to indicate 
that this species is widespread in Chile at least. I he fact that the 
epigeic collections in the United States have been limited to the 
vicinity of major ports makes it seem probable that this is an imported 
form here. Its one collection in a cave was in association with another 
troglophile species, Sinella caeca. Further collections will have to be 
made before anything can be said about the significance of this in- 
vasion. 
Pseudosinella espana, new species 
Figures 38-42 
Facies typical of genus. Color white without trace of pigment. 
Head oval, eyeless. Antennae one and one half times as long as 
cephalic diagonal, with the first three segments subcylindrical and 
fourth segment ellipsoidal ; apical organ of third segment with two 
paddle-shaped setae having central supporting rods. Second thoracic 
segment not strikingly humped. Fourth abdominal segment slightly 
more than three times as long as third. Unguis narrow and sickle- 
