LIST OF DIPTERA. 473 



joints, adorned with numerous side bristles : chest clothed with 

 some black hairs, beset on each side and behind with a few black 

 bristles, adorned with three indistinct tawny stripes, and on each 

 side of the front with a semicircular white spot ; fore chest, scutch- 

 eon, hind chest, and breast hoary : abdomen narrower than the 

 chest, and less than twice its length, tapering from the base to the 

 tip, thinly clothed with very short tawny hairs, and at the tip with 

 some longer black hairs ; hind borders of the segments and under- 

 side gray ; first and second segments very short ; third and follow- 

 ing segments long, successively decreasing in length : legs black, 

 clothed with very short tawny hairs, armed with black spines ; 

 shanks very dark red, with black tips and streaks ; foot-cushions 

 dark tawny ; hips gray : wings brown ; wing-ribs piceous ; veins 

 black ; poisers tawny. Length of the body 9 lines ; of the wings 16 

 lines. 



a. New Holland. Presented by the Haslar Hospital. 



Ommatius Cceraebus, n. s., mas. et fern. Niger, thoracis vittis tri- 

 bus aureis, lateribus pectoreque flavis, antennis pedibusque nigris, 

 tibiis flavis apice nigris, alis subfuscis, mari. dilatatis. 



Body black : head narrower than the chest, covered behind and 

 beneath with hoary down, and above with pale yellow down, beset 

 behind the eyes with a row of black bristles, clothed beneath with 

 white hairs ; tubercle of the eyelets beset with a few black hairs ; 

 clypeus armed with many long pale yellow bristles, and on the 

 hinder part with a few darker bristles : eyes dark bronze, large ; 

 fore part flat, its facets larger than those of the other part : lip 

 black, clothed at the tip with short tawny hairs ; palpi black, red at 

 the tips, clothed with long black hairs : feelers black ; first and se- 

 cond joints covered with tawny down, beset with black hairs ; second 

 joint shorter than the first ; third joint long-conical, much longer 

 than the second; bristle nearly twice the length of all the preceding 

 I joints, adorned with numerous side bristles: chest clothed with 

 j a very few short black hairs, furnished on each side and behind with 

 some longer hoary hairs and with a few black bristles, adorned with 

 I three golden stripes ; side stripes connected by two oblique golden 

 bands with the sides of the chest, which are pale yellow like 

 the breast ; the latter has a hoary tinge : abdomen hardly half the 

 i breadth of the chest, and less than twice its length, tapering for 

 nearly one-third of the length from the base, linear, and nearly cy- 

 j lindrical from thence to the tip, clothed with hoary hairs on each 

 i side, and with a few black hairs at the tip ; first and second segments 

 I very short; third and following segments long, successively decreas- 

 ing in length : legs black, armed with black spines ; thighs and 



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