472 LIST OF DIPTERA. 



Ommatius Papus, n. s., mas. Fuscus, thoracis vittis tribus canis, 

 lateribus pectoreque fulvis, metathorace cano, antennis pedibusque 

 nigris, alisfuscis apice obscurioribus. 



Body dark brown : head large, as broad as the chest, covered 

 with tawny down, clothed behind and beneath with hoary hairs, be- 

 set behind the eyes with a row of black bristles ; tubercle of the 

 eyelets, front and sides of the crown covered with black hairs ; cly- 

 peus prominent, thickly beset with bright tawny hairs : eyes large, 

 bronze ; fore part flat, its facets much larger than those of the other 

 part : lip black, clothed at the tip with short tawny hairs ; palpi 

 black, beset with long black bristles : feelers black ; first and second 

 joints beset with long black bristles ; second joint about half the 

 length of the first ; third joint spindle-shaped, nearly as long as the 

 first; bristle much longer than all the preceding joints : chest 

 clothed with very short black hairs, beset on each side and behind 

 with black bristles, adorned with three hoary stripes ; sides and 

 breast tawny, with a hoary tinge : hind chest hoary : abdomen nar- 

 rower than the chest, and nearly twice its length, tapering from the 

 ' base to the tip, clothed with tawny hairs, especially on each side to- 

 wards the base ; first and second segments very short ; third and 

 following segments long, successively decreasing in length ; sexual 

 parts black, shining, rather large ; legs black, clothed with dark 

 tawny hairs and black bristles ; hips and thighs clothed with long 

 and paler hairs ; foot-cushions tawny : wings brown, darker towards 

 the tips ; wing-ribs piceous ; veins black ; poisers piceous. Length 

 of the body 10 lines ; of the wings 18 lines. 



Ommatius Lema, n. s., fern. Piceus, thoracis vittis tribus fulvis 

 maculisque duabus arcuatis albis, lateribus pectoreque canis, ab- 

 dominis segmentorum marginibus posticis ventreque cinereis, an- 

 tennis pedibusque nigris, tibiis rufis nigro variis, alis fuscis. 



Body piceous : head nearly as broad as the chest, covered 

 beneath with hoary down, above with yellow down, beset behind the 

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

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

 clypeus armed with very long pale yellow bristles, and on the hinder 

 part with a few black bristles : eyes large, bronze ; fore part nearly 

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

 its tip clothed with short tawny hairs ; palpi black, clothed with long 

 white hairs : feelers black ; first and second joints beset with short 

 black hairs; second joint much shorter than the first; third joint 

 short-conical, hardly more than half the length of the first and the 

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



