170 W. M. GRAHAM- — 



and enclosing a large black mark, divided longitudinally by a stria, on either 

 side o£ the thorax. Scutellum yellow with 2 black bristles. Pleura dark 

 brown, crossed by a broad yellow band which ends in a nearly circular spot on 

 the sternopleura. Hypopleura with two yellow spots of nearly equal size. 

 Abdomen elongate, with obtuse apex ; 1st segment dark brown with a 

 yellow apical transverse line ; 2nd segment mostly yellow, with brown lateral 

 margins ; remainder of abdomen dark brown laterally, with a median broad 

 longitudinal yellowish band to the apex where it expands into a nearly 

 circular pale area. Down the middle of this band runs a dark brown, narrow, 

 longitudinal stripe the whole length of the abdomen. Venter pale brown 

 with 3 median brown spots. Legs wi(h the coxse dark brown, femora yellow 

 with the apical third brown, tibiae dark brown, tarsi brown with the first 

 joint yellow. Wings hyaline with pale brown veins. A brown costal band 

 divides at the base of the wing so as to leave the costal, and half the 

 subcostal, cell clear yellowy it then narrows, leaving the basal half of 

 1st posterior cell a clear yellow, and then expands into a large brown area 

 covering the apex of the wing and extending across it into the 2nd posterior 

 cell. Anal cell covered by a brown band extending to the edge of the wing 

 and into the 3rd posterior cell. Halteres : knob semitransparent white, stem 

 white. 



? . Ovipositor pale brown, cylindrical, with expanded base. 



Length of body 8 mm., wing 6*5 mm. 



Described from a female taken on a wall in the garden at Yaba, Lagos, 

 at 5 P.M., 12.ix.l909. 



Type in the British Museum. 



Remedial Measures. 



On the subject of prevention a similar statement will apply equally well to 

 both Ceratitis and Dams, A fruit infected by these flies cannot be cured, 

 and is a source of infection ; it should therefore be destroyed and care should 

 be taken to do so early enough to ensure the destruction of all the contained 

 maggots, before they escape into the earth. 



If the native fruits infected by these flies were identified, and when 

 infected destroyed, the flies could be greatly diminished in the course of a 

 couple of seasons. 



Infected fruit can be destroyed by burning or boiling. When the amount 

 is large and these means of destruction are not available, it is only necessary 

 to bury the infected fruit deep enough to prevent the fly, when it leaves 

 the pupa-case, from reaching the surface. A depth of two feet should be 

 sufficient to ensure this, especially if the earth filled in over the fruit is well 

 trampled down. 



Yaba. 28.V.10. 



