34 SYRPHID.E. 



A single male from Salisbury, S. Rhodesia (Q-. A. K. 

 Marshall}. 



28. Syrphus trisectus, Locw (1858). 



Very near fialteatus, but differing in its smaller size and 

 brighter orange abdomen ; the abdominal black bands are usually 

 not duplicated, that of the fourth segment generally being widely 

 interrupted in the middle; and the black supra-antennal spot is 

 always present. 



Of six specimens examined, only a male from Durban has the 

 duplicated bands well developed and shaped almost as in balteatus ; 

 this specimen also is the only one which has the black band on the 

 hind border of the fourth segment entire. The eyes are wholly bare, 

 even in the undescribed male, which entirely resembles the female, 

 except in the sexual differences. 



A male and a female from Durban (F. Mnir) ; three females 

 from British East Africa, one from Kenia Forest, near Luchi 

 River, 9. ii. 1911 (T. J. Anderson}, another from Ovanvi, 8. vii. 

 1910 (Dr. J. Puqli), and the third from Marsabit, 20. ix. 1911 

 (R. J. Stortly)\ a male from Obuasi, Ashanti. ll.viii. 1900 (Dr. 

 W. M. Graham}. This species was up to the present known only 

 from Caffraria, but has evidently a wide distribution throughout 

 the Ethiopian Region, where it replaces the European fialteatus. 



29. Syrphus redivivus. sp. n. 



c^ . Lenc/tli 10 mm. 



A narrow elongate species, with black striped face, yellow 

 antennae, three partly interrupted yellow abdominal bands, and black 

 genitalia. 



This species appears to belong to the auricollis-group, and its 

 allies among the described Ethiopian species are sckultzianus, Bex/d 

 (1908), citictifacies, Speiser (1910), and fees, Bezzi (1912). 



Head black ; frons and face yellow, the former more reddish ; a 

 black supra-antennal spot and a brown facial middle stripe reaching 

 the base of the antemue ; peristoma narrow, yellow; facial tubercle 

 rounded, large, prominent; frons clothed with long dark hair, 

 face with white hair on the side ; vertical triangle small, not 

 very prominent; eyes bare, with the upper facets larger; antenna 1 

 short, yellow, the third joint rounded, narrowly darkened above ; 

 middle postocular border with silvery hairs. Thorax shining, 

 yellowish towards the sides, but without any sharply detined yellow 

 stripe, clothed with long erect dark hair ; pleura? blackish grey, 

 yellowish on the hind angle of mesopleura ; breast shining black, 

 bare. Scutellum dark yellow, with black hair. Squamuke dirty 

 white, halteres yellow. Abdomen shining black, but second, third, 

 and fourth segments broadly dull velvety black .on disc ; its hair 

 is long and dark, but pale on the base; first segment black; second 

 with an ovate yellow spot on each side, placed in the middle and not 

 reaching the sides ; third and fourth each with two oblique spots, 



