RESEARCH IN BRITISH WEST AFRICA, ae 
in many places the pony extricated itself from the mud only with difficulty. 
In such swamps //. versicolor is practically always found. The River Mariga is 
crossed in canoes, but no blood-sucking flies were seen here, although two hours 
were spent in transferring loads and carriers. Plate X. illustrates the type of 
vegetation on the banks of the rivers in this part of the Protectorate. About 
half a mile further on is Mariga, a small town of about 200 inhabitants. Around 
the houses in the native town large pools of water were everywhere seen. These 
contained innumerable mosquito larvae and pupae, but careful search failed to 
reveal any imagines in the houses themselves. The larvae and pupae collected 
here have not yet been identified. One Tabanus subangustus was captured flying 
around the lamp on the table in the rest-house at 8 p.m. 
While we were encamped at Mariga, it rained heavily and_ persistently 
throughout the whole night and up to about 9a.m. The road to Bobi is very 
similar to that between Tegina and Mariga. There are numerous swamps and 
running streams, and two fairly large rivers have to be crossed. One, about a 
mile from Bobi, is very swift and deep, but not broad; here one specimen of 
T. subangustus, was captured at noon. ‘Three species of /laematopota were 
caught at Bobi: H. bullatifrons, H. lacessens, and two specimens of a species not 
yet described. 
The country from Bobi to Baeri is covered with moderately thick bush, but 
towards Baeriit is hilly, The road passes through numerous swamps, but there 
are no large rivers to be crossed. During the journey, HZ. bullatifrons and 
another specimen of the new species referred to above were caught. At Baeri 
Tabanus albipalpus and T. subangustus were secured, In the rest-house book 
the following note, dated 17. v. 07, appears: “ Tsetse-fly is found here” ; but 
none was seen during my visit on 3, ix, 10. On my horse were found several 
Amblyomma variegatum. 
The road from Baeri to Kontagora (20 miles) is through thin bush country 
and practically level ; four miles from Baeri, the Igberi River has to be crossed 
by means of calabashes. No blood-sucking insects of any description were seen 
during this journey. 
Kontagora is a large town of over 4000 inhabitants and is the headquarters of 
the Province of the same name. It stands about 1300 feet above sea-level, and is 
probably the highest point between Zungeru and Yelwa. Rivers to the west of 
this point, ¢.g., the Kontagora River, flow in a south-westerly direction directly 
into the Niger, while those to the east, eg., the Igberi River, flow south- 
easterly into the Kaduna, which itself is a large tributary of the Niger. The 
Residency is situated about two miles from the native town, and the surrounding 
district, though swampy in parts, is well cleared. The only blood-sucking fly 
seen was Hippobosea maculata, and this occurred in numbers around horses ; 
numerous Rhipicephalus simus were also found on these. A jigger, Dermatophilus 
penctrans, was obtained from the foot of a native. In the hospital, however, 
numerous flies, collected some time previously by medical officers and residents 
in this province, were examined and the data of these ought to be recorded 
here. From Kontagora itself, the only species were Tabanus biguttatus croceus, 
collected by Dr. McKinney in August, 1910, and Myzomyia costalis, collected 
