REPORT OF THE ENTOMOLOGICAL SECTION 129 



Tlie tick referred to in the last Eeport, issued by these Laboratories, as Manidnrpiif: 

 anniilatinf var. decolorata, has been determined by Professor Nuttall to be identical witii 

 Boophilus an.itrali.<. This species appears to be widely distributed throughout the southern 

 provinces, and a number of specimens has been received from Portuguese East Africa. 

 Ornithodoron aaviyniji has been taken by Mr. H. A. MacMichael in several parts of Kordofan, 

 and no fewer than three hundred and seventy specimens were collected, in the space of two 

 hours, from under a single tree by a well, a few miles N.N.E. of Khartoum North in August, 

 1909. This tick has been the subject of some investigations carried out by the Bacteriological 

 Section of these Laboratories. 



In the following synoptic table of Sudanese ticks, as far as possible, only those 

 characters which can readily be made out are utilised. Many of these characters are 

 those used by Salmon and Stiles in their work on the cattle ticks of the United States.* 

 This table is incomplete as regards some of the species of Amhlyomma owing to lack 

 of available material, but all the recorded members of this genus are nevertheless 

 mentioned. Ornithodoros moiibata, the transmitter of relapsing fever in Uganda and 

 elsewhere, is included, as it is more than possible that it occurs in the Bahr-El-Ghazal 

 and other southern provinces, and in any case it is useful to be able to distinguish between 

 it and the closely allied 0. ^avif/ni/i. It must be remembered that although this table 

 deals with all the species known at present to occur in this country — with the exception 

 of the undetermined species of Aponomma from a guinea-fowl — it is almost certain that 

 the names of others will have to be added to the list as time goes on. 



Synoptic T.\i)le op Sitd.^nese Ticks Synoptic 



Table 



(Scutum absent ... ... ... ... ... ... ... ... ... ... 2 



I Scutum present ... ... ... ... ... ... ... ... ... ... 7 



(Margin of body difl'ering in structure from general integument ... ... ... 3 



LMargin of body not differing in structure from general mtegument ... ... 5 



^Dorsum pitted by symmetrically arranged polygonal depressed areas bounded by 



3 j rugose ridges ... ... ... ... ,.. ... ... ... Anjan brnDipti 



^Dorsum not pitted by such depressed areas ... ... ... ... ... ... 4 



fBody longer than broad ... ... ... ... ... ... . . Argas per.''icus 



\ Body broader than long ... ... ... ... ... ... Argas vespertilionis 



J. (Body panduriform ; found in ear ... ... ... ... Ornithodoros megnini 



iBody oval G 



(Eyes present on supra-coxal fold ... ... ... ... Ornithodoros savignyi 



LEyes absent ... ... ... ... ... ... ... ... Ornithodoros: monbata 



("Palpi short, subtriaugular, not or only slightly longer than broad; capitiihnii sliort 8 



[Palpi longer than broad; capitulum long ... ... ... ... ... ... IS 



C Dorsal surface of capitulum hexagonal ... ... ... ... ... . . 9 



o - 



[Dorsal surface of capitulum rectangular ... ... ... ... ... 17 



(Stigmata comma-shaped ... ... ... ... ... ... ... ... ... 10 



I Stigmata nearlv round ... ... ... ... ... ... Boophilim ain'trali." 



lo|^^l^ " 11 



tlemale . . ... ... ... ... ... ... ... ... ... ... 14 



(Punctations on scutum unequal (large and small) ... ... ... ... ... 12 



(Punctations equal or nearly so ... ... ... ... ... ... ... . l.'j 



• Salmon and Stiles, (1902), Cattle Ticks of the United States, United States Dept. of Agriculture 



i; 



