CERATOPOGON. 215 



17. halteratus, Winn. ! Linn. Ent. vi. 28. 17. pi. 4. f. 17 (1852). 

 Mas, ater, antennarum pluina apice albo-nitente, thorace nitido, alis 

 hyalluis nigro-cinereo-pilom, venis pallidis apud costam fuscescentibus, 

 vena costali setosa, haUeribus apice lacieis, abdomine nigro-fusco, pills 

 nigro-cinereis, pedibus albido-pilosls, femoribus piceis, tiblis pallidioribus, 

 tarsis albldls. Long. \ ; alar. \\ lin. 



Male. Blach. Plumes of the antennre glisteniiig-wliite towards the 

 tips. Thorax deep blach, sldnhtg. Wings hyaline, with blackish-grey 

 hairs; veins pale, brownish towards the costa ; costal vein setose. 

 Halteres loilh the apical half of the club milk-white. Abdomen blackish- 

 brown, clothed icith blackish-grey hairs. Legs clothed with long tchitish 

 hairs ; femora piceous ; tibice paler ; tarsi whitish ; tips of their joints 

 darker. 



Not common. (E.) 



18. velox, Winn. ! Linn. Ent. vi. 28. 18. pi. 4. f. IS (1852). Foem. 

 niger, obscuriis, nigro-hirtus, alis hyalinis nigro-hirtis, vena costali valida 

 obscure nigra, halteribus albis nigro-petiolatis, pedibus piceis, tarsis fla- 

 vescentibns. Long. \ ; alar. 1 lin. 



Fern. Black, not shining, clothed with black hairs. Antenna? brown, 

 with black hairs, those of the last five joints glistening-white ; five 

 basal joints cylindrical, the three following more oval, the fifth apical, 

 long, elliptical. JFlngs hyaline, clothed with black hairs ; costal vein 

 thick, black. Halteres with tchite knobs. Hairs of the abdomen and 

 of the legs glistening-hoary. Legs piceous ; tarsi yellowish. 



Eare. (E.) 



19. frutetorum, Winn. ! Linn. Ent. vi. 29. 19. pi. 4. f. 12 (1852). 

 Mas et Fieni. niger, thorace suhnitido albido-pubescinte, alis hyalinis 

 albido-hirtis, venis pallidis apud costam fuscescentibus, halteribus apice 

 albis, abdomine obscure nigro-fusco albldo-plloso, pedibus palllde piceis 

 albldo-hlrtls, tarsis pallidioribus; Mas, antennarum plumis albidis ; 

 Fcem. antennis albo-pilosis. Long. \-\ ; alar, f lin. 



Male and Fern. Black. Third and fourth joints of the palpi occa- 

 sionally yellowish. Thorax sometchat shining, covered with short ichltish 

 down, which appears greyish in some aspects. Wings hyaline, apf)car- 

 ing glistening-white when seen on a dark surface, clothed with whitish 

 hairs ; veins pale, brownish towards the costa. Halteres with the apical 

 half, or the whole, of the club milk-white. Abdomen dull black Ish-brown, 

 clothed with long whitish hairs. Legs pale piceous, furnished with long 

 whitish hairs ; tarsi pale. Male. Plumes of the antennre glistening- 

 white towards the tips. Fern. Antenn<c with white hairs ; joints almost 

 cylindrical, closely joined together, the five last somewhat elongated. 

 Wings hardly glistening- white, their clothing generally thicker and 

 darker than that of the male. 



(E.) 



20. sylvaticus, Wiim.! Linn. Ent. vi. 29. 20. pi. 4. f. 20 (1852). 



