92 
Psyche 
[June 
three setae on the scutum instead of five. It seems more 
desireable at present to expand the meaning of Euschon- 
gastia to include E. phylloti than to erect a new genus or 
to accept Ewing’s interpretation of Ascoschongastia. 
Trombicula pearsoni n. sp. 
Figure 2 
Body: Oval, 350 microns long by 250 mcirons wide, 
striae fine anteriorly coarser posteriorly, eyes opposite 
posterior lateral scutal setae, anterior eyes larger 18 mi- 
crons, posterior eyes 15 microns, both eyes on an indis- 
tinct ocular plate, anus ventral more than its own length 
from the posterior end in a partially engorged specimen. 
Gnathosoma: Chelicerae with rounded basal segments 
that are longer than the narrow dorsally curved distal 
segments. Each distal segment with a tricuspid cap, 
one tootli dorsal, one ventral, and one apical. Palpal 
segments evenly rounded laterally; segment 1 with a 
feathered seta ; 2 with a feathered seta ; 3 with a feathered 
seta with fewer barbs than seta on 2 ; 4 with a nude dorsal 
seta, a branched lateral seta, and a feathered ventral seta. 
Palpal claw with two small outer prongs and a large 
median prong. Palpal segment 5 with a basal spur and 
seven feathered setae. Galeal seta nude or with one or two 
barbs. No stigmata or tracheae present. 
Legs: Coxae in partially engored specimens nearly 
contiguous. Each coxa with a single feathered seta. 
Sensory setae on legs as follows : 
I — a microgenuala between a pair of genulae, a micro- 
tibiala lateral to the posterior of two tibialae, 
a micro spur anterior to the spur, a subter- 
minala and parasubterminala that arise from 
a single base, and a pretarsala. 
II — one genuala, 2 tibialae, a microspur posterior to 
the spur, and pretarsala. 
Ill — one genuala and one tibiala. 
Each leg is terminated by a pair of curved claws that 
arise on the lateral tip of the pretarsus. A thin claw-like 
empodium is present between the claws. 
Scutum: The scutum is roughly pentagonal, and is 
