1072 LIST OF DIPTERA. 



tawny at the base; scales white, of moderate size, fringed with 

 white h irs, the lower extending a little beyond the upper. Length 

 of the body 3^ — 4 lines ; of the wings 7 lines. 



Dacus basalis, n. s. Cyaneo viridis, capite fulvo supra subtusque 

 nigro, oculorum marginibus facieque albis, abdomine basisubtus 

 fulvo, palpis fulvis, antennis pedibusque ferrugineis, alls sub- 

 cinereis, costa nervisque transversis fusco nebulosis. 

 Body bluish-green : head tawny, black beneath and on the 

 crown ; a white stripe along each eye ; face white, its sides without 

 bristles ; epistoma prominent: eyes pitchy; fore part flat, its facets 

 much larger than those elsewhere : sucker black, clothed with tawny 

 hairs ; palpi tawny, rather large, beset with black bristles : feelers 

 ferruginous, full as long as the face ; third joint linear, slender, 

 pitchy towards the tip, more than four times the length of the 

 second; bristle slender, black, bare, tawny towards the base, much 

 longer than the third joint: chest covered with whitish bloom : ab- 

 domen linear, tawny towards the base beneath, much longer and 

 narrower than the chest : legs ferruginous, clothed with very short 

 black hairs ; feet pitchy towards the tips ; claws black ; foot-cushions 

 tawny : wings slightly gray, brown along the fore border from near 

 one-third of the length to the tip ; middle and lower cross-veins 

 clouded with brown, which has the darkest hue on the former ; wing- 

 ribs ferruginous; veins pitchy, ferruginous towards the base ; longi- 

 tudinal veins nearly straight; middle cross-vein very oblique ; lower 

 cross-vein nearly upright, parted by little less than its length from 

 the middle cross-vein, by much more than its length from the tip of 

 the wing, and by little more than one-fourth of its length from the 

 hind border ; poisers pale tawny. Length of the body 2f lines ; of 

 the wings 5 lines. 



a. Port Essington. From Mr. Gould's collection. 



b. ? 



Dacus trivittatus, n. s., mas. Piceus, capite fiavo vitta picea ornato, 



thorace jiavo trivittato* abdominis apice ferrugineo, palpis fuscis, 



antennis fulvis artieulo 3° supra piceo, pedibus piceis tibiis tar- 



sisque posticis femoribusque fulvis,alis limpidis ad costamfuscis. 



Body pitchy, clothed with very short yellow hairs : head and 



chest beset with a few black bristles : head yellow ; a broad pitchy 



stripe on the crown ; furrows of the face black, its sides without 



bristles; epistoma slightly prominent : eyes pitchy; fore part flat, 



its facets much larger than those elsewhere: sucker pitchy, clothed 



