14 
Psyche 
[March - June 
these and the cave forms. The coloration is the most variable charac- 
teristic; some specimens are white save for the eyespots, while all 
others are almost totally blue. 
Pseudosinella gisini , new species 
Figures 25-30 
Facies typical of genus. Color white with a scattering of blue pig- 
ment particularly clear upon the dorsum of the head. Head elongate 
oval with two eyes per side located upon a single dark eyepatch. 
Antennae about three and one half times as long as cephalic diagonal 
with all segments subcylindrical in shape; fourth antennal segment 
without apical cone and showing definite signs of ringing; third seg- 
ment with apical organ of two curved, narrow, paddle-shaped setae 
with supporting rods along one margin. On the opposite side of the 
apex of third segment are five blunt finger-like setae. Second thoracic 
segment not humped. Fourth abdominal segment about four times as 
long as third. Unguis long and curved with external and lateral teeth 
minute and three inner teeth, basal pair small but clear and on a level, 
median unpaired tooth minute, visible only under highest magnifica- 
tion. Empodial appendage with slight basal internal swelling. Tenent 
hair finely clavate. Mucro with teeth subequal, apical tooth not sharp- 
ly upturned, basal spine heavy, reaching apex of anteapical tooth. An- 
terior macrochaetae as follows: dorsum of head with four interanten- 
nal setae forming the corners of a rectangle, and a row of eight setae 
forming a straight line along each antenna base; ventral surface with 
scattered setae over the anterior half of the median and lateral sur- 
faces. Second thoracic segment with two to three rows of setae along 
the anterior margin and a single row along the lateral margin. 
Type locality: Foxhole Cave no. 1, Greenbrier County, West Vir- 
ginia, VIII- 19 ’58. Barr coll. Also known from eight additional caves, 
all in Greenbrier County. 
Discussion 
The most prominent variation seen in the species concerns the 
median unpaired tooth of the unguis which may be entirely absent. In 
such forms the tenent hair is very weakly clavate so that this is visible 
only under highest magnification and with phase contrast. Although 
the typical form of this species is strikingly distinct from the typical 
form of P. hirsuta there are some specimens of the latter species which 
approach gisini in one or more characteristics (see discussion under 
P. hirsuta) ; however, the two can always be distinguished on a basis 
of the cephalic chaetotaxy and the tenent hair. 
