﻿162 JAS. J. SIMPSON—ENTOMOLOGICAL 



time, made extensive collections and also bred numerous species of mosquitos 

 from larvae. He has himself published a short report on his observations on 

 the district in a previous number of this Bulletin,* so that it is unnecessary 

 for me to enter into much detail here. I have, however, considered it advis- 

 able to include his list of blood-sucking insects for the sake of completeness, 

 along with some other species collected by me during my tour in the district. 



The country is for the most part covered with thick bush, and there is also 

 a large number of oil palms. It is well watered by several large rivers, the 

 most important of which are the Oshun, the Otin and the Shasha ; the first 

 and last-mentioned of these we have now traced from their mouths to their 

 source, from Epe through Ijebbu-Ode. 



The country is undulating and there are no extensive swamps ; to the north- 

 east are hills, which separate the Western Province from the Niger system ; 

 to the north-west open grass country extends through the district of Oyo to 

 the Shaki highlands ; to the south-east thick forest is found, merging into the 

 forest region of the Ondo district. 



Game is scarce, but a few antelope and some leopard are still to be found. 

 Of the domestic animals the most common are sheep ; goats are also abundant, 

 and in several places one finds a number of cattle, both the hump-backed or 

 " Zebu " variety from Northern Nigeria, and the small native breed. Horses 

 are often introduced from Northern Nigeria but seldom thrive. 



The following blood-sucking insects have been found in the district, but I 

 would draw attention to the paper, already cited, by Dr. Mayer on their distri- 

 bution, numbers and seasonal prevalence. 



Diptera. — Glossina palpalis, G. longipalpis, Stomoxys brunnipes, Stomoxys 

 nigra, Tabanus quadrisignatus, T. subangustus, T, pluto, Chrysops longicomis, 

 C. silacea, Hippocentrum versicolor, Haematopota decora, H. tenuicrus, Culex 

 decens, C duttoni, C. pruina, C. tigripes var. fuscus, C. zombaensis, Myzomyia 

 costalis, M. funesta, M. umbrosa, M. marshalli, Myzorliynchus mauritianus, 

 M. paludis, Mansonioides uniformis, Culiciomyia nebulosa, Ochlerotatus nigeri- 

 ensis, Stegomyia africana, S. fasciata S. sugens, Eretmopodites quinquevittatus 

 and Uranotaenia mayeri. 



Siphonaptera. — Ctenocephalus canis from dogs. 



MALLOPHAGA.f — Menopon nigrum (a new species), Nirmus varius, and Colpoce- 

 phalum semicinctum ; these were all obtained by the writer from a white-necked 

 raven (Corvultur albicollis), and Colpocephalum flavescens which was found on a 

 vulture. 



Ixodoidea. — Boophilus decolorants from cows, Rhipicepkalus simpsoni, Nutt. 

 and Warb., sp. n., on bush-rat and Rhipicepkalus neavei. 



It is interesting to note that from a bush-rat killed by me at Oshogbo, in 

 addition to the new species of tick mentioned above, two new worms were also 



* Bull. Ent. Res. IT, pt. 3, pp. 273-276 (1911). 



f Kellog and Paine, Bull. Ent. Res. IT, 2, pp. 147-151 (1911) 



