Characters in Paratrombium — Newell 
357 
SUMMARY OF CHARACTERS AND VARIANTS 
IN adults of Paratrombium 
la. Sensilla smooth (Fig. 77). 
lb. Sensilla distinctly barbed (Fig. 76). 
2. Number of setae on each anterolateral 
lobe of scutum (from constriction an- 
terior to area sensilligera to anterior ex- 
tremity, and omitting the medial setae). 
3a. Posterior end of crista metopica dis- 
tinctly swollen (Fig. 20). 
3b. Posterior end of crista metopica not 
swollen (Fig. 50). 
4. Number of setae on each genital sclerite. 
5. Number of setae on each para genital 
sclerite. 
6a. Row of denticles on tarsus of chelicera 
distinctly bent near the middle (Fig. 22). 
6b. Row of denticles on tarsus of chelicera 
forming a straight line (Fig. 55). 
7. Position of solenidion of palpal tarsus. 
8. Number of eupathidia on palpal tarsus. 
9. Length of tarsus I, female. 
10. Height of tarsus I, female. 
11. Length of tibia I, female. 
12. Length/height, tarsus I, female. 
13. Tarsus I/tibia I, female. 
14a. Hysterosomal setae tapering uniformly, 
peripectinate (Figs. 3-7). 
14b. Hysterosomal setae rounded distally, 
clavate, peripectinate (as in Paratrombium 
insulare Berlese 1910). 
14c. Hysterosomal setae diclavate, i.e., essen- 
tially clavate, but deeply bifid (as in P. 
divisipilli Feider 1948) . 
15. Body length, by sex. 
SUMMARY OF CHARACTERS AND VARIANTS 
in larvae of Paratrombium 
la. Postscutum with two setae in normal 
individuals. 
lb. Postscutum with four setae in normal 
individuals. 
2. Total number of postscutal and post- 
coxal setae. 
3a. Palpal tarsus with only two minute, peg- 
like setae terminally (oil immersion, 
Fig. 35). 
3b. Palpal tarsus with four setae here (not 
distinct except in most favorable ma- 
terial) . 
4. Position of Si. 
5. Position of e d on tarsus I. 
6 Position of fi. 
7. Position of s 2 . 
8. Position of f 2 . 
9a. Posterior claw reduced to a minute ves- 
tige about 4 fi long. 
9b. (Other variants?) 
10. Length of scutum/length of postscutum. 
11. Width of scutum/width of postscutum. 
12. Width of postscutum/length of post- 
scutum. 
13. Width of scutum, /x. 
14. Length of idiosoma of unengorged larva. 
Paratrombium bidactylus, new species 
female: Idiosoma 1820 /x long to tip of 
scutum, 1118 /x wide, length/width 1.63. 
Scutum (Fig. 20) widest at anterior end, the 
width equal to .62 of the median length. The 
Distribution of Character Variants, Adults 
1 
2 
3 
4 
5 
6 
7 
8 
9 
p.b 
a 
22-25 
a 
37-39 
26-29 
a 
.87-.92 
11 
486-491 n 
P. Cf 
b 
13-14 
b 
48-55 
ca. 55 
b 
.80-.85 
17-19 
423 n 
P.d. 
b 
? 
a 
? 
? 
p 
p 
? 
454-474 M (462) 
10 
11 
12 
13 
14 
15 
P.b 
153 m 
261 n 
3.24 
1.86-1.90 
a 
1820 ix* 
P. q .. 
144-149 m 
261—2 66 n 
2.84-2.94 
1.59-1.62 
a 
1768 ix* 
P.d. 
p 
232-261 /x (252) 
? 
(1.83) 
b 
$ 1638-1885 /x (1816) 
cf 1085-1740 ix (1402) 
* Based on females which had laid full complement of eggs. 
