1898.] NATURAL SCIENCES OF PHILADELPHIA. 157 



DIPTERA COLLECTED BY DR. A. DONALDSON SMITH IN SOMALILAND, 



EASTERN AFRICA. 



BY CHAS. W. JOHNSON. 



The Diptera described and listed in this and the following paper 

 by Dr. Garry de N. Hough, were collected by Dr. Smith on his ex- 

 pedition through Somaliland from Berbera to Lake Rudolf, thence 

 southeast to the coast. 1 All of the specimens have been presented 

 to the Academy of Natural Sciences of Philadelphia by Dr. Smith. 



In studying this material I have had to depend entirely on de- 

 scriptions, and one important paper I have been unable to consult, 

 so that a few species have had to be set aside for the present. For 

 any error, therefore, that may occur in their identification, I wish to 

 beg kind indulgence. I also wish to express my sincere thanks to 

 Dr. Hough for his kindness in working up the Muscidse. 



CTJLICIDiE. 



Culex sp. 



Two specimens, Sheikh Husein. Oct. 7th. Too imperfect for deter- 

 mination. 



STRATIOMYID^. 

 Sternobrithes tumidus Loew. 



Sternobrithes tumidus Loew, Oefers. Kongl. Akad. Forhand., 264, 1856. 



One specimen, Sheikh Husein, October 3, 1894. 



TABANIDJE. 



Pangonia obesa Walker. 



Pangonia obesa Walker. Insecta Saund. I, 14. 



Five specimens 9 collected at Sheikh Husein, Sept. 20, 1894, 

 agree with Walker's description. 



Pangonia appendiculata Macquart. 



Pangonia appendiculata Macq. Dipt. Exot. I, 97, PI. 13, fig. 2. 

 ? Pangonia varicolor Wied. Auss. Zweifl., I, 100. 



One specimen ( <? ), Abula, November 25, 1884. 



Ckrysops stigmaticalis Loew. 



Chrysops stigmaticalis Loew. Dipt. -Faun. Ind-Afri. (101), 29, I860; 

 Oefers. Kongl. Akad. Forhand., 338, 1857. 



One specimen ( 9 ), Sheik Mahomet. November 9, 1894. 



1 See Dr. Smith's article and maps, in The Geographical Journal for August 

 and September, 1896. 



