9A-> 



SIR RUBBRT BOYOE— THE PREVALENCE. DISTRIBUTION AND 



with several silvery spots. Abdomen dark brown, unbanded, with pale rather 

 indistinct lateral spots on some of the last segments. The last segment with 

 two bright metallic spots ; venter with bands of the same metallic appearance 

 as those on the thorax. Legs black, femora with metallic white patches on 

 the inner surface ; tibise of the first two pairs of legs black, of the hind pair 

 with a white basal band, narrow on the upper surface but much deeper on the 

 ventral surface. Tarsi of the fore and mid legs with two rather indistinct 

 white bands ; hind pair with four bands, the third being very broad and the 

 fourth narrow. The two latter are separated by a small black band. 



Wings similar to those of Stegomyia fasciata. 



Length 4-4:'5 mm. 



The following synopsis may 

 three species : — 



Stegomyia fasciata. 

 Head. Distinct double median 



and marginal lines. 



Thorax. Dark brown, witli two 

 narrow yellowish-white 

 parallel median lines 

 and two silvery lateral 

 curved lines (lyre-pat- 

 tern). 



Abdomen. Dark, with white basal 

 bands and lateral ^pots. 



'^eys. Femora often with a 



distinct white line con- 

 tinuing- from the base 

 almost to the apex ; 

 white apical spot ; pale 

 ventrally. 



Tibiae black. Tarsi of 

 fore and mid pairs of 

 legs with two white 

 bands; hind pair with 

 five bands, the last joint 

 being all white. 



also assist the student in discriminating these 



Stegomyia sugens. 



Indistinct white median 

 line and lateral white 

 patches. 



Dark browii, with four 

 silvery- white spots on 

 the anterior part and 

 pale areas due to scat- 

 tered silvery scales. 



Dark brown, with white 

 basal bands and lateral 

 spots. 



Femora with a white 

 ring near the apex and 

 a white apical spot ; 

 scattered white scales 

 ventrally. 



Tibiae with a white 

 band near the middle, 

 more distinct in the hind 

 pair. Tarsi of fore and 

 mid pairs of legs with 

 three narrow white 

 bands ; hind pair with 

 five broad bands *, last 

 joint all white. 



Stegomyia africana. 

 Yellow ish spot in centre. 



Black, with two short 

 white metallic lines 

 directed upwards on the 

 anterior portion and a 

 spot of similar appear- 

 ance at the base of each 

 wing. 



Dark, unhanded, with pale 

 rather indistinct lateral 

 spots on some of the 

 last segments. The last 

 segment with two bright 

 metallic spots. 



Femora with metallic 

 patches on the inner 

 surface. 



Tibiae of fore and mid 

 legs black, of hind pair 

 with a white basal band 

 much broader on the 

 ventral surface Tarsi 

 of fore and mid pairs 

 with two indistinct 

 white bands ; hind pair 

 with four bands, the 

 third very broad and 

 the fourth very small. 



* These are deeper than those 

 in Steg. fasciata. 



