1898.] NATURAL SCIENCES OF PHILADELPHIA. 163 



spots, the upper one at the junction of the front and vertex ; face 

 light yellow, palpi yellow, proboscis black, occiput black, shining ; 

 antenna?, first and second joint and arista yellow, third joint black- 

 ish, and longer than the first and second taken together. Thorax 

 black with a hoary bloom which is more dense on the pleura? and also 

 forms a wide dorsal stripe, dorsum with numerous black bristles, 

 humeri shining, scutellum black with two lateral and two very long 

 apical bristles. Abdomen black, disc and a narrow dorsal line on 

 the last segment hoary, the lateral portion of the segments shining 

 black, venter hoary. Legs yellow with black hairs, outer half of 

 the anterior tibia? and the first joint of the tarsi black, with long 

 dense black hairs, tips of the posterior femora brownish. Wings 

 hyaline, iridescent in certain lights, veins yellow. 



One specimen, Sheikh Husein, October 3, 1894. 



This species may be distinguished from Anaphalantus pennatus 

 Loew, by the third joint of the antenna? being black, and the outer 

 half of the tibia? only, being black. 



TRYPETIDJE. 



Trypeta angusta Loew. 



Trypeta angusta Loew, Berl. Entom. Zeit., 1861,271, Taf. II, fig. 9. 

 One specimen, Sheikh Husein, October 11, 1894. 



SEPSIDJE. 



Sepsis costalis n. sp. 



Length 5 mm. Face and cheeks brown ; front, vertex and occi- 

 put black. Antenna? reddish-brown, proboscis black. Thorax and 

 abdomen black, opaque. Legs entirely black. Wings hyaline, 

 except the costal cell which is entirely black. 



Two specimens, Sheikh Husein, October 3, 1894. 



Sepsis sp. 



Two specimens, Sheikh Husein, October 3rd ; Ginea, November 



14, 1894. 



DIOPSID^E. 



Diopsis somaliensis n. sp. 



Length 7 mm. Head red, shining, with very sparse white hairs, 

 mouth parts and lateral prolongations that form the eye-stalks, 



brownish, the enlarged portion that forms 

 the base of the eye, dark brown, antenna? 

 reddish, arista? brown. 



Thorax black with a very short white 

 pubescence, scutellum black, spines yellow- 

 Fig. 3. ish, tips of the spines brown, halters light 



