LIST OF DIPTEKA. 873 



Musca Certima, n. s., fern. Cyaneo-viridis, capite luteo, thorace vittis 

 quinque purpureis, sculello cyaneo, abdomine albo micante, apice 

 aureo, segmentorum marginibus posticis cyaneis, palpis fulvis, 

 antennis pedibusque ferrugineis, femoribus nigro-ameis, alis sub- 

 cinereis. 



Body thinly clothed with black hairs and bristles : head tawny 

 above, luteous and clothed with bright tawny hairs in front and be- 

 neath ; a ferruginous stripe fringed with bristles between the eyelets 

 and the feelers ; epistoraa very prominent ; sides of the face beset 

 with very few bristles at the base : eyes red ; fore part flat, composed 

 of larger facets than those elsewhere : sucker black, clothed at the 

 tip with pale tawny hairs ; palpi tawny, slender, beset with black 

 bristles : feelers ferruginous, a little shorter than the face ; third 

 joint paler and shining at the base, about four limes the length of 

 the second, slightly decreasing in depth from the base to the tip, 

 which is rounded ; bristle ferruginous, much longer than the third 

 joint: chest bluish green, adorned with five dark purple stripes ; 

 scutcheon bright blue : abdomen elliptical, green, adorned with 

 white reflections, a little broader, but not longer than the chest ; 

 hind borders of the segments blue ; last segment brassy green, 

 adorned with golden reflections and clothed with some tawny hairs : 

 legs dark ferruginous, clothed with black hairs and bristles ; thighs 

 brassy black, with ferruginous tips ; foot-cushions tawny : wings 

 slightly gray ; shoulders tawny ; wing-ribs pitchy ; veins black ; 

 tip cross-vein forming hardly less than a right angle with the fourth 

 longitudinal vein, curved inward along the second quarter of its 

 length, straight from thence to the tip, joining the border a short 

 distance above the tip of the wing ; lower cross-vein straight for a 

 very short distance from the base, then having a very slight inward 

 curve, and afterwards a deeper outward curve ; scales whitish, with 

 pale yellow borders. Length of the body 4 lines ; of the wings 8 

 lines. 

 a. Florida. Presented by E. Doubleday, Esq. 



Musca Lyrcea, n. s., mas. Cyaneo-viridis, capite fulvo supra fusco, 



thorace vittis quatuor canis, scutelli disco purpureo, abdomine 



aneo-viridi, basi vitia et segmentorum marginibus posticis cya- 



neis, palpis fulvis, apice nigris, antennis pedibusque nigris, tibiis 



ferrugineis, femoribus posterioribus fulvo cinclis, alls subcinereis. 



Body clothed with black hairs and bristles : head covered with 



a pale yellow bloom on the sides of the face, tawny and clothed with 



pale yellow hairs on the sides of the peristoma ; a deep brown stripe 



fringed with bristles between the eyelets and the feelers ; epistoma 



prominent ; sides of the face beset with very few bristles at the 



4g 3 



