CERATOPOGON. 211 



the tips. Hind tibiae somewhat incrassated. Fern. Antennae yellowish- 

 brown. Hind femora and hind tibiae incrassated. 



The larva feeds on the extravasated sap of the poplar. (E. ?) 



6. piceus, Winn. ! Linn. Ent. vi. 21. 6. pi. 3. f. 6 (1852). Mas 

 et Foem. nigro-piceus, pectoris lateribus nitidis, alis hyalinis nigro-hirtis, 

 basi fasciculoque costali trigono albidis, venis pallide fuscis apud costam 

 obscurioribus, halteribus abdominisque incisuris albidis, pedibus nigro- 

 piceis, tarsis albo-flavis, articulis apice fuscis ; Mas, antennarum pluma 

 apice albida, tibiis posticis nonnihil incrassatis ; Fcem. obscurior, an- 

 tennis flavo-fuscis, femoribus tibiisque posticis iucrassatis. Long. 1-1^ ; 

 alar. 2 lin. 



Male and Fern. Much resembles 0. Kaltenbachii. Piceous, almost 

 black. Sides of the pectus shining. Wings hyaline, with black down, 

 the base and a triangular costal tuft whitish ; veins pale brown, darker 

 towards the costa. Halteres and sutures of the abdomen whitish. Legs 

 bl'ackish-piceous ; tarsi whitish -yellow, their joints with brown tips. 

 Male. Plumes of the antennae glistening-whitish towards the tips. Hind 

 tibiae somewhat incrassated. Fern. Darker than the male. Antennae 

 yellowish-brown. Wings very thickly clothed with black hairs. 



(E.) 



7. ciliatus, Winn. ! Linn. Ent. vi. 21. 7. pi. 3. f. 7 (1852). Fcem. 

 niger, flavo-albo-hirto, antennis apices versus albido-pilosis, alis hyalinis 

 nigro-cinereo-pubescentibus, venis fuscis apud costam nigris, halteribus 

 albis, ventre nigro-fusco basi sordide flavo, pedibus piceo-fuscis flavido- 

 pilosis, tarsis albidis apice piceis. Long. 1-1 -g-; alar. 2 lin. 



Fern. Black. Antennae clothed with black hairs, which are glisten- 

 ing-white towards the tips ; joints from the first to the eighth thick, 

 oval ; the other five elliptical. Thorax shining, occasionally piceous, 

 beset with short yellow or yellowish-white hairs ; a whitish-yellow fleck 

 on each side of the pectus before the wings, on the fore pectus, and 

 on the fore coxae, lyings hyaline, with blackish-grey pubescence ; veins 

 brown, black towards the costa. Halteres white. Abdomen clothed 

 with short yellowish-white hairs ; under side blackish-brown, dingy- 

 yellow or brown towards the base. Legs piceous-brown, with yellowish 

 hairs ; femora and tibiae very slightly incrassated ; tibiae fringed with 

 pointed lancet-like scales; first, second, and third joints of the tarsi 

 whitish. 



Not common. (E.) 



8. crassipes, Winn. ! Linn. Ent. vi. 22. 8. pi. 3. f. 8 (1852). Mas 

 et Fcem. nigro-cinereus, thoracejlavo nigroque piloso, scutello nigro-hirto, 

 alis albidis cinereo-hirtis, venis pallidis apud costam fuscis, halteribus 

 albis, abdomine pedibusque uigro-fuscis nigro-cinereo-pilosis, femoribus 

 tibiisque robustis, tarsis albo-flavis apice nigro-fuscis ; Mas, antennarum 

 plumis apice albo-nitentibus ; Foem. antennis flavidis, apice fuscis. Long. 

 4-1 ; alar. 2 lin. 



