6 
Psyche 
[March - June 
i o') Basal inner ungual teeth clearly larger than others, typically 
six eyes per side P. duodecimpunctata 
ii ) Fourth antennal segment more than two times as long as 
cephalic diagonal P. ho net i n. sp. 
n') Fourth antennal segment less than one and seven-tenths times 
as long as cephalic diagonal 12 
12) Distance from distal base of largest inner ungual tooth to base 
of unpaired inner tooth less than half that from unpaired tooth 
to apex of unguis (See figure 44), macrochaetae present in 
median field of dorsum of head P. orha n. sp. 
12') Distance from largest basal inner tooth to median unpaired 
tooth at least half as great as distance from apical tooth to apex 
of unguis, macrochaetae absent from median field of dorsum of 
head 13 
13) One or both basal inner ungual teeth large and prominent (See 
figure 31 ), ratio of fourth antennal segment to cephalic diagonal 
less than .8 P. ar gen tea 
13') Both basal inner ungual teeth small (See figure 47), and/or 
ratio of fourth antennal segment to cephalic diagonal greater 
than .8 eyeless forms of P. hirsuta 
Explanation of Plate 1 
Figures 1-5: Pseudosinella duodecimpunctata. 1. Habitus, specimen from 
New River Cave, Giles Co., Va.; setae and pigment omitted; 19 X. 2. Hind 
claw, same specimen; 900 X. 3. Mucro, same locality; 900 X. 4. Apical 
organs, third antennal segments two different specimens, same locality; 900 X. 
5. Eyes and eye patch, same locality; 900 X. 
Figures 6-11: P. dubia n. sp. 6. Habitus, specimen from Granny Dean 
Cave, Washington Co., Ark.; setae and pigment omitted; 18 X. 7. Apical 
organ, third antennal segment, same specimen; 900 X. 8. Eye patch right 
side, same specimen; 250 X. 9. Mucro, same specimen; 500 X. 10. Hind claw, 
same specimen; 500 X. 11. Typical setae association of fourth abdominal 
segment, paratype; 900 X. 
Figures 12-16: P. sexoculata. 12. Habitus, specimen from Carlsbad Caverns, 
N. Mex., setae omitted, 30 X. 13. Mucro, same specimen, 900 X. 14. Apical 
organ third antennal segment, same specimen; 900 X. 15. Hind claw, same 
specimen; 900 X. 16. closeup of head, same specimen, A.-interantennal setae, 
B. -antennal base setae, C. -median field setae; 150 X. 
Figures 17-21: P. alba. 17. Habitus, specimen from Niagra Cave, Fillmore 
Co., Minn.; 30 X. 18. Hind claw, same specimen; 900 X. 19. Apical organ, 
third antennal segment, same specimen; 900 X. 20. Mucro, same specimen; 
900 X. 21. Right eye patch, specimen from Mystery Cave, Fillmore Co., 
Minn. ; 300 X. 
Figures 22-24: P. folsomi. 22. Apical organ, third antennal segment, speci- 
men from Limberlost Valley Cave, Newton Co., Mo.; 900 X. 23. Hind claw, 
same specimen; 900 X. 24. Mucro, epigeic specimen from Harahan, La.; 500 
X. 
