94 
Psyche 
[June 
below. The anterior ventral setae, including the sternal 
setae, differ from the dorsal setae in that their barbs are 
slightly longer and arise from only two lines along the 
shaft rather than all over the shaft. The arrangement in 
indefinite rows is given below. 
Specimen 
Dorsal setae 
Ventral setae 
Total 
Type 
2-8— 5— 8-4-6-4 
+ 9 
2-2 + 16 
66 
456-2 
2— 6— 2-8-7— 7— 4 
+ 14 
2-2 + 16 
70 
456-1 
2-8-6-8— 6-8 
+ 18 
2-2 + 18 
78 
Material: These specimens were collected by 0. P. Pear- 
son at Caccacliara, 50 miles S.W. of Have, Peru, at an 
elevation of 16,000 feet. 
O. P. Pearson’s # Host Date Number of Specimens 
456 Punomys 13 September 2 + Type 
lemminus 1946 (MCZ No. 3027) 
Diagnosis : Tromhicula pearsoni can be distinguished 
from other members of the genus because while it has a 
pentagonal scutum it lacks whip-like setae on the third 
legs. In these characteristics it is similar to Tromhicula 
hiops n. sp. but can be distinguished from it most readily 
on the basis of the feathered dorsal seta on the palpal 
tibia in T. hiops, as opposed to the nude seta found in 
this position in T. pearsoni. 
Remarks: This species is named for the collector O. P. 
Pearson. 
Tromhicula biops n. sp. 
Figure 3 
Body: Elongated 462 microns by 200 microns, striae 
well developed, eyes two on either side at the level of the 
posterior lateral setae. No ocular plate present. Diam- 
eter of anterior eye 10 microns, posterior eye 8 microns. 
Anus about twice its length from the posterior end on the 
ventral side. 
Gnathosoma : Basal segments of clielicerae weakly angu- 
lar laterally, distal segments short with tricuspid cap. 
Palpal segment 1 with a feathered seta ; 2 with a feathered 
seta; 3 with a feathered seta; 4 with two branched setae 
and a ventral feathered seta, palpal claw with two small 
subequal dorso-lateral prongs and a stout longer median 
