*If small punctations are present in this group of three species, they are extremely shallow, irregular, and non-discrete. Do not confuse in this group exceptionally sparsely-punctate H. marginatum, which in all instances has a large, widely transverse, very strongly bulging genital apron not found in this group of species.

6. Genital apron a transverse oval, posteriorly deeply concave in profile. Scutal punctation usually small and regular, rarely coarse....

Genital apron strongly bulging
(convex) in profile..

7. Genital apron large, a widely transverse oval or triangle. Scutal punctations shallow, large ones restricted to anterior half, small ones widely scattered....

Genital apron an elongate triangle
flanked by two lobes, giving it a
trilobed appearance. Scutal puncta-
tions usually numerous, regularly
spaced, and medium-size posteriorly
and centrally with two rows of larger
and deeper punctations among them;
with larger punctations anteriorly
and in scapular fields....

.H. TRUNCATUM

Figures 188 and 189

..7

..H. MARGINATUM Figures 180 and 181

.H. IMPELTATUM Figures 172 and 173

Figures 158 and 159, C, dorsal and ventral views
Figures 160 and 161, 9, dorsal and ventral views

A to F, g genital area outline and profile.

A to C, partly engorged. D, fully engorged. E and F, unengorged.

HYALOMMA DETRITUM Schulze, 1919

(Including H. SCUPENSE Schulze, 1919)

(Figures 158 to 161)

THE SHINY HYALOMMA

NOTE: The some twenty synonyms of H. detritum, as presented by Delpy (1949B), are listed in the section on DISTRIBUTION below according to the political areas from which the specimens of each originate. It is impossible to believe that H. detritum had not been described as a species by some author somewhere prior to 1919, yet no contemporary specialist has come forth with a previous name for this species. Steps should be taken to stabilize the name H. detritum in order to prevent the further confusion that is bound to arise when an earlier name for this tick is inevitably dis covered. Special attention is called to the "biological race", H. scupense, discussed below.

DISTRIBUTION IN THE SUDAN

H. detritum occurs rarely in northern parts of the central Provinces of the Sudan. Additional collecting is necessary to determine its exact distribution here. It would be of some interest to know whether H. detritum has invaded the Sudan from the Red Sea coast or via the Nile Valley.

Kassala: Port Sudan (cattle; SVS). It is not known whether hosts of these specimens were local or transient animals.

Kordofan: Four males have been collected from Kordof an cattle at the Khartoum Quarantine station (January and February)