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15. Adanal shields sickleshaped. Three

middle festoons may protrude. Posterő-
median groove shallow but usually dis
cernible. Punctations slightly more
dense bordering posteromedian groove.
Interstitial punctations varying from
absent to fairly mumerous but not
obscuring basic pattern. (Specimens
may integrade with R. s. simus)..

Adanal shields unusually wide, with
rounded outer and posterior margins
but with an elongated point at the
juncture of the posterior and the con
cave inner margin, this point reaches
the festoons. Scutum exceptionally
flat and broad...

16. Lateral grooves replaced by a line of
almost contiguous punctations. Pos
terior grooves merely faint, shagreened
lines. Punctations mumerous, close or
contiguous, mixed large and small.
(A mountain inhabiting species)..

Lateral grooves present. Other charac
ters various..

17. Posteromedian and paramedian grooves wide and deep (like those of R. s. sanguineus). Adanal shields typical ly broadly triangular (like those of R. s. sanguineus) but may be reduced to a pseudosickleshape. Punctations deep, dense, medium to large, some confluent; fewer laterally..

Posteromedian and paramedian grooves
long and very narrow or vague or
obsolete...

..R. S. SENEGALENSIS

Figures 305 and 306

.R. CUSPIDATUS Figures 257 and 258

.R. KOCHI

Figures 269 and 270

..17

[graphic]

.R. SULCATUS

Figures 309 and 310

..18

18.

Scutal punctations uniformly shallow, small or medium size, dense and close everywhere except in scapular areas, on festoons, outside lateral margins, and in narrow area just inside lateral margins. Posteromedian and paramedian grooves vague or obsolete. Adanal shields typically sickleshape (reduced in small specimens)....

Scutal punctations uniformly large, deep, dense but not contiguous in central area, variable in size in cervical area, fewer laterally. Posteromedian and paramedian grooves long and narrow. Adanal shields broadly triangular but with rounded margins, inner margin slightly con cave and more or less pointed at juncture with posterior margin, other junctures rounded...

.R. LONGUS

Figures 277 and 278

.R. COMPOSITUS Figures 253 and 254

FEMALES

1. Eyes convex or hemispherical, distinctly furrowed or in a depression...

Eyes flat or slightly rounded..

2. Eyes small, hemispherical, in a depres sion ("orbited"). Scutum with broadly rounded posterior margin; punctations dense, large and medium size, extending to lateral margins. Body reddish, legs saffron, scutum dark....

Eyes moderate, convex, with an en-
circling furrow. Scutum with posterior
margin sinuous, strongly converging pos
teriorly; moderate numbers of mostly
medium size punctations extending to
lateral margins only anteriorly..

3. Palpi markedly conical in outline.
Scutum longer than wide; lateral
grooves absent; lateral margin elevated;
cervical grooves pronounced; punctations
large and small mixed, fairly numerous.

[blocks in formation]

.2

.3

.R. E. EVERTSI Figures 267 and 268

..R. PRAVUS

Figures 287 and 288

.R. ARNOLDI
Figure 246

..4

..5

.9

5. Punctations exceptionally rugose, dense; cervical fields markedly reticulate.......

Punctations not exceptionally rugose; cervical fields mildly or nonreticulate...

6. Lateral grooves lacking; scutum slight ly wider than long; numerous moderate size punctations onto lateral ridges...

Lateral grooves present and distinct.. 7. Scutum no longer than or not so long as wide; posterior margin bluntly rounded; numerous large punctations; lateral ridges extending to posterior margin, raised, wide, glossy, mostly impunctate..

Scutum longer than wide; lateral ridges not markedly raised or glossy; with some punctations on lateral ridges..

8. Scutal punctations fairly large, deep, and uniform, dense, evenly distributed between lateral ridges, fewer on lateral ridges and beside lateral grooves; pos terior margin gradually rounded, non sinuous. Large tick...

Scutal punctations mixed medium to large
size; unevenly but densely distributed
and extending onto lateral ridges; pos
terior margin tapering and sinuous.
Medium size tick...

.R. SUPERTRITUS

Figures 315 and 316

..6

.R. KOCHI

Figures 271 and 272

.7

.R. COMPOSITUS Figures 255 and 256

..8

...R. LONGUS

Figures 279 and 280

..R. SULCATUS Figures 311 and 312

9. Punctations inconspicuous, obsolete
or rare, small, interstitials obsolete
or inconspicuous. Scutum generally
but not always longer than wide.
Small parasite of cane rats...

Punctations conspicuous, rare to
moderate numbers. Moderate to fairly
large size species......

10. Scutum with notably few, moderate or large, scattered punctations in central field..

Scutum with moderate to large number of
small, medium size, or large punctations...

11. Lateral grooves typically long and distinct (frequently reduced in R. s. simus, see page 752)..

Lateral grooves absent or typically
so short and indistinct as to be
questionable, frequently replaced by
several large, deep, punctations...

12. This and the following subspecies cannot be distinguished with certainty. Size moderate. Scutal posterior margin usually somewhat sinuous; punctations restricted to few of moderate size but deep, distinct, and widely scattered; interstitials normally few, rare, inconspicuous, sometimes fairly numerous but small and superficial..

Size fairly large. Other characters as
above, although punctations are often
somewhat larger than in subspecies
simus. Differentiated with certainty
only by association with male.....

.R. SIMPSONI

Figures 299 and 300

..10

..11

...16

...12

..13

.R. SIMUS SIMUS Figures 303 and 304

.R. SIMUS SENEGALENSIS
Figures 307 and 308

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