476 LIST OF DIPTERA. 



Ommatius Hecale, n. s., mas. et fem. ? Mas. Fuscus, thoracis vittis 

 duabus cinereo-fulvis, marginibus scutelloque cinereis, pectore 

 cano, antennis nigris, pedibus fiavis, tarsis obscurioribus, femori- 

 bus tibiisque apice nigris, alis limpidis, inari. ad costam dilatatis 

 cinereoque maculatis. 



Body brown : head as broad as the chest, covered with hoary 

 down, clothed behind and beneath with white hairs, beset behind 

 the eyes with a few black bristles ; tubercle of the eyelets furnished 

 with a few black hairs ; front clothed with a few white hairs ; cly- 

 peus armed with long white bristles : eyes 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, clothed with 

 long black hairs : feelers black; first and second joints beset with 

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

 joint long-conical, a little longer than the second ; bristle nearly twice 

 the length of all the preceding joints, adorned with many side bris- 

 tles : chest beset on each side and behind with a few white bristles, 

 adorned with two dull tawny grayish stripes ; fore chest, scutcheon, 

 hind chest and sides gray ; breast hoary : abdomen much narrower 

 than the chest and nearly twice its length, nearly linear from the 

 second segment to the tip, clothed with short pale yellow hairs, and 

 on each side, especially towards the base with longer hairs ; first and 

 second segments very short ; second segment with a slight tawny 

 tinge, broader, and more convex than the following segments ; 

 third and following segments long, successively decreasing in 

 length: third segment crossed by rows of black punctures: legs 

 yellow, clothed with pale yellow hairs, armed with pale yellow and 

 black spines ; tips of thighs and of shanks black ; hind feet black, 

 piceous at the base ; four front feet tawny, piceous towards the tips; 

 claws black, tawny at the base ; foot-cushions tawny : wings colour- 

 less, gray beneath the convex part of the fore border, which is less 

 widened than that of some other species ; wing-ribs ferruginous ; 

 veins black, ferruginous at the base ; poisers pale tawny. Fem, — 

 Feet black, piceous at the base ; hind feet quite black ; hind thighs 

 mostly black: wings with a very slight brown tinge, not widened. 

 Length of the body 7 lines ; of the wings 1 1 lines. 



a. ? 



b. ? From Mr. Children's collection. 



Ommatius Tarchetius, n. s. Fulvus, thoracis vittis quatuor fmcis, 

 pectore cano, abdomine fusco fasciis fulvis, antennis pedibusque 

 fulvis, alis subfulvis. 



Body tawny : head narrower than the chest, hoary and clothed 

 with white hairs behind and beneath ; front and clypeus clothed 



