90 
Psyche 
[ .) une 
tlie modified setae on the legs is that it will call attention 
to their presence and importance in the descriptions of 
trombiculid larvae. A nameless structure is more likely 
to be ignored than one for which a name is available. 
The above system of nomenclature will be adopted in 
describing the four species included in this paper. Spe- 
cial drawings of the legs (Figure I) have been made so 
that the modified setae can be shown in detail. 
Euschongastia phylloti n. sp. 
Body: Oval in shape, 560 microns long and 360 wide, 
striae over entire surface. A pair of subequal eyes with 
well developed corneas on each side of the body at the level 
of the posterior lateral scutal setae. Eyes about 15 mi- 
crons in diameter. Anal opening ventral. 
Gnathosoma: Chelicerae stout, basal segments with 
angular lateral expansions, distal segment with a hyaline 
tip that bears a dorsal tooth, a minute ventral tooth, and 
a pointed apex. Palpal segment 1 with a feathered seta; 
2 with a feathered seta; 3 with a seta that is nude or 
branched; 4 with a dorsal and ventral setae feathered and 
lateral seta nude or branched, palpal claw with two small 
dorso-lateral tines and one large median tine ; 5 with a 
spur, 5 ventral feathered setae, and one dorsal feathered 
seta. Galeal seta nude. No stigmata or tracheae present. 
Legs: Coxae I and II contiguous, coxa III about its own 
length posterior to coxa II. All coxae with a single seta 
except the right coxa of specimen #540-2 which has two 
setae. Sensory setae on legs as follows : 
I — 2 genualae, 1 microgenuala, 2 tibialae, 1 micro- 
tibiala, 1 spur, 1 micro spur lateral to the spur, 
1 subterminala, 1 parasubterminala, and 1 
pretarsala. 
II — 1 genuala, 2 tibialae, 1 spur, 1 micro spur posterior 
to the spur, and 1 pretarsala. 
Ill — 1 genuala and 1 tibiala. 
Each leg terminates in a pair of tarsal claws that are 
lateral to a medium longer and thinner claw-like em- 
podium. 
