84 TRAUB & AUDY 
Euschongastia (Walchiella) calunosa n. sp. (figs. 36-45). 
Diagnosis of Larva . — In the segmentation of the legs (legs II and III 6-segmented) and in 
general characters, E. calunosa n. sp. is close to E. oudemansi (Walch 1922), E. lewthwaitei 
(Womersley 1952) and E. traubi (Womersley 1952) which are members of the genus Walchiella 
Fuller 1952, recognised by us provisionally as a subgenus of Euschongastia sensu lato. The new 
species is distinguishable from E. traubi in having the dorsal setae arising from normal if well- 
chitinised bases and not from platelets. It is distinguishable from E. oudemansi in having 
non-toothed chelicers, from both E. oudemansi and E. lewthwaitei in the shape and size of the 
large scutum, and further from E. lewthwaitei in having only 28 dorsal setae instead of 42. 
Description of Larva. — Body: Subovate, about 450x2904 in fairly engorged specimen. Eyes 2+2 
on ocular plate, anteriormost somewhat the larger. Gnathosome: Chelicers 3-4 times as long as broad at 
base; tricuspid cap prominent. Palpal formula N/b(3~4)/bbb, the sparsely branched setae with 2-6 
branchlets. Palpal claw 3-pronged but innermost ventral quite short, inapparent from dorsal aspect. 
Galeal seta nude. Palpal coxal seta well-plumed. Scutum: About 1.6 times as broad as long; anterior 
margin doubly but shallowly sinuate, the convexity median; lateral margins somewhat concave except at 
broadly rounded shoulders, especially near insertion of PL bristles; narrowing from rear to front; caudal 
margin sinuate, biconvex, the concavity median. Almost entirely punctate. Sensillae inserted slightly 
nearer posterior margin than anterior margin; with distinct ridges anterior to bases. Sensillae fusiform, 
about 58 x 9.54 (including petiolate base), setules dense, relatively long (54), AM seta submarginal; slightly 
more than 2/3 depth of scutum (SD) and a trifle longer than ALs. PLs somewhat less than half scutal 
depth. The scutal bristles densely clothed but the branches so short and appressed as to be inapparent. 
Standard Measurements in 
Microns, 
E. calunosa n. sp. 
AW PW 
SB ASB 
PSB 
A-P 
AL 
AM 
PL 
D.S 
PW 
Coxa if 
PW 
ASB 
PW 
A-P 
PSB 
SB-PL* 
72 
72 100 
43 32 
28 
42 
40 
47 
30 
57 
100/70 
3 -i 
2-37 
28/11 
Paratypes (io) Mean 
71 100 
43 33 
28 
42 
42 
49 
30 
58 
= 1.43 
1.42 
3.0 
2.37 
= 2.5 
3-3 
Range ( + or — ) 
6 6 
3 2 
2 
3 
4 
5 
3 
5 
0.05 
0.15 
0.08 
0.8 
Body Setae: Setal bases rather prominent (fig. 39, dorsal seta, and fig. 40, ventral) well sclerotized. Dorsal 
setae pinnatifid, often subpectinate, the branchlets fairly long and well separated; apical fifth of bristle 
usually nude, acuminate; those near midline longer (about 57^) lateral setae shorter (to 454), about 28-30, 
irregular due to displacement of lateral setae to points between rows, i.e. 2.64.4.6.4.2(2). Ventral setae 
42-48, about 19 4, subpectinate, pinnatifid, plus about 16 postanals caudal setae. Legs: Seta on each 
coxa plumed, well developed. Posterior margins of coxae relatively well sclerotized (cf. E. indicella). 
Sensory setae of legs as in E. indicella n. sp. 
Type Material. — Holotype and 25 paratypes ex Rattus rattus baluensis, a densely furred rat of the 
uppermost reaches of Mt. Kinabalu; Kamborangah, elev. 7,800 ft., 26. vii. 1951 (R. Traub). Holotype 
(U.S.N.M. 2115) in U.S. National Museum. Paratypes distributed as for E. indicella sp. nov. 
Euschongastia (Walchiella) asonluca n. sp. (figs. 46-53, p. 87). 
Diagnosis of Larva . — Separable from E. calunosa n. sp. in the small and differently shaped 
scutum; PW/'coxa-II ratio about 1.2, not 1.42; and in the relatively smooth dorsal setae, not 
pinnatifid. Separable from E. lewthwaitei in the smaller scutum, and in having 28 instead of 
42 dorsal setae, and separable from all other members of the subgenus Walchiella in the second 
dorsal seta of the first row being about twice as long as the others. 
Description of Larva. — Body: Subovate, about 163 x 2384 in somewhat engorged holotype. Eyes 2+2 
on ocular plate. Gnathosome: Chelicers rather broad, slightly less than three times as long as broad at 
base. Palpal formula N/N/NNb. Palpal claw 2-pronged, medial prong the longer. Palpal coxal seta 
plumose. Scutum: Somewhat trapezoidal, well chitinised, about 1.4 times as broad (at maximum) as long. 
Anterior and posterior margins slightly sinuate; lateral margins slightly convex, sloping forwards. Scutal 
setae with branchlets closely appressed to axis, appearing simple; short; (AM missing in all specimens 
examined); AL slightly longer than PL setae; AL about one-half depth of scutum. ALs submarginal; 
PLs somewhat displaced forward, away from caudal margin. Sensillae clavate, with distinct petiolate 
base, 40 x 174 with well-separated spicules about 54. Body Setae: Dorsal setae resemble scutal seta in 
that branchlets are usually inapparent; unusual in that second bristle (on each side) of first row typically 
twice as long as other setae. DS about 28, arranged 2. 6. 6. 2. 6.... the rest irregular; Ventral setae 22-24, 164, 
minutely serrate, plus 12-14 caudal setae. Legs: Coxal setae thinly plumed. Posterior margins of coxae 
fairly well sclerotized. Sensory setae of legs as in E. indicella n. sp. 
* SB-PL is distance from SB to PL. 
STUD. INST. MED. RES . 
