46 
Argas persicus 
Fig. 25. Male; serial transverse sections through digit of left chelicera : a. at level of 
extremity of internal article and free margin of hood ; h. at level of upper portion 
of dorsal process; c. at level of place of fusion of dorsal process with internal article ; 
d. at level immediately below dorsal process; e. at level of lower portion of external 
article, showing divisions of flexor tendon of digit; /. at level of pore in base of 
internal article, showing extensor tendon and articulatory ligament of digit, x -500 
diam. 
Fig. 26. Female; tarsus rudimentary and pulvillium of leg I, showing Haller’s organ 
etc., X 125. 
Fig. 27. Larva ; terminal portion of tarsus and pulvillium, x 125. 
INDEX TO LETTERING ON PLATES I TO VI. 
AjB,C, By Ey F, G, H, I and K 
an. 
aii.ap. 
an. 771. 
an.v. 
a. por. 
b. e. 
b.ch. 
hue.can. 
buc.cav. 
cam. 
cam./, 
cap. 
car. 
cc.al. 
ch. 
cl. 
cV. 
cx.iy cx.iiy cx.iiiy cx.iv. 
ex.f. 
dc. 
d.ch. 
d.p. 
d. sal. 
e. a. 
fm. 
gen.ap. 
h. 
Hal.org. 
hd. 
h.g. 
h.m. 
Indicating levels of transverse sections of the capitulum 
on PI. V (see PI. IV, flg. 8 and PI. VI, fig. 21). 
anterior margin of body, 
anus. 
anal aperture, 
anal annulus, 
anal valve. 
area porosa of spiracle. 
basis capituli. 
expanded base of chelicera. 
buccal canal. 
buccal cavity. 
camerostome. 
camerostomal fold. 
capitulum. 
caruncle. 
alimentary coeca. 
chelicera. 
claws. 
roughened area on claws of larva 
coxae i to iv. 
coxal fold, 
disc. 
digit of chelicera. 
dorsal process, 
salivary duct, 
external article, 
femur. 
genital aperture, 
hypostome. 
Haller’s organ, 
hood. 
hypostomal gutter, 
hypostomal margin. 
