i6 
Psyche 
[March - J une 
Facies typical of genus. Color white with scattered blue pigment 
particularly upon head. Head almost round when seen from above, 
often with traces of pigmentation on eyespot region ; eyeless ; antennae 
with third segment sub-conical in shape; fourth antennal segment 
much shorter than cephalic diagonal and with apex rounded, without 
apical cone. Apical organ of third segment of two strongly curved 
blunt pegs with an additional pointed peg off to one side. Thorax 
not humped and head prognathous. Fourth abdominal segment about 
four times as long as the third segment. Unguis with one or both basal 
teeth enlarged and a single median tooth prominent and projecting. 
Empodial appendage lanceolate with a very small external tooth. 
Tenent hair weakly clavate. Mucronal teeth subequal and basal 
spine attaining the apex of the median tooth. Anterior macrochaetae 
as follows: dorsum of head with four interantennal setae arranged in 
a narrow rectangle and with a small seta located in the center of 
this rectangle. Antennal bases with seven setae arranged 6-1 in a 
straight line along the base. Venter of head with a few scattered 
setae near the anterior margin. Second thoracic segment with three 
to four rows along the anterior margin and a single row of smaller 
setae along the lateral margin. 
Type locality: a grave, Washington, D. C. Range: known from 
caves in Missouri, Central Tennessee, and single localities in Ken- 
tucky, Virginia, Arkansas, Georgia and Washington, D. C. 
Discussion 
This species is almost as variable as P. hirsuta «nd in some forms 
the basic structure is very similar. The two species can always be sep- 
Explanation of Plate 3 
Figures 43-46: holotype of P. orha n. sp. 43. Habitus, setae omitted; 30 X. 
44. Hind claw; 500 X. 45. Apical organ, third antennal segment; 900 X. 
46. Mucro ; 500 X. 
Figures 47-58: P. hirsuta. 47. Hind claw, specimen from Ward Cave, 
Bedford Co., Tenn.; 350 X. 48. Unguis, another specimen same locality; 
350 X. 49. Hind unguis, specimen from Mill Creek Cave, Davidson Co., 
Tenn.; 250 X. 50. Apical organ, third antennal segment, same specimen as 
fig. 47; 900 X. 51. Habitus, topotype ; 18 X. 52. Mucro, same specimen as 
fig. 47; 900 X. 53. Mucro, topotype; 900 X. 54. Mucro, same specimen as 
fig. 49; 900 X. 55. Apical cone fourth antennal segment, specimen from Piper 
Cave, Smith Co., Tenn.; 900 X. 56. Antennal base setae, same specimen; 
250 X. 57. Thoracic profile, specimen from Gassaway Cave, Metcalfe Co., 
Ky. ; 30 X. 58. Thoracic profile, specimen from Pratt Cave, Pickett Co., 
Tenn.; 30 X. 
Figures 59-61: P. spinosa. 59. Mucro, specimen from Jared Hollow Cave, 
Putnam Co.. Tenn.; 900 X. 60. Apical organ, third antennal segment, speci- 
men from Payne Saltpeter Cave, Grundy Co., Tenn.; 900 X. 61. Hind 
claw, same specimen; 250 X. 
